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Zhang Y, Ju J, Li M, Ma Z, Lu W, Yang H. Dose-dependent effects of polystyrene nanoplastics on growth, photosynthesis, and astaxanthin synthesis in Haematococcus pluvialis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 359:124574. [PMID: 39029865 DOI: 10.1016/j.envpol.2024.124574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 07/01/2024] [Accepted: 07/17/2024] [Indexed: 07/21/2024]
Abstract
Microalgae play an important role in aquatic ecosystems, but the widespread presence of micro- and nano-plastics (MNPs) poses significant threats to them. Haematococcus pluvialis is well-known for its ability to produce the antioxidant astaxanthin when it experiences stress from environmental conditions. Here we examined the effects of polystyrene nanoplastics (PS-NPs) at concentrations of 0.1, 1, and 10 mg/L on H. pluvialis over an 18-day period. Our results show that PS-NPs caused a significant, dose-dependent inhibition of H. pluvialis growth and a reduction in photosynthesis. Furthermore, PS-NPs severely damaged the morphology of H. pluvialis, leading to cell shrinkage, collapse, content release, and aggregation. Additionally, PS-NPs induced a dose-dependent increase in soluble protein content and a decrease in the production of extracellular polymeric substances. These findings indicate that PS-NPs has the potential to adversely affect both the physiology and morphology of H. pluvialis. An increase in reactive oxygen species and antioxidant enzyme activities was also observed, suggesting an oxidative stress response to PS-NPs exposure. Notably, the synthesis of astaxanthin, which is crucial for H. pluvialis's survival under stress, was significantly inhibited in a dose-dependent manner under strong light conditions, along with the down-regulation of genes involved in the astaxanthin biosynthesis pathway. This suggests that PS-NPs exposure reduces H. pluvialis's ability to survive under adverse conditions. This study enhances our understanding of the toxic effects of PS-NPs on microalgae and underscores the urgent need for measures to mitigate MNP pollution to protect aquatic ecosystems.
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Affiliation(s)
- Yingying Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China.
| | - Jian Ju
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Min Li
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Zhuyi Ma
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Wenyan Lu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Hui Yang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
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2
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de Jesús-Campos D, García-Ortega LF, Fimbres-Olivarría D, Herrera-Estrella L, López-Elías JA, Hayano-Kanashiro C. Transcriptomic analysis of Chaetoceros muelleri in response to different nitrogen concentrations reveals the activation of pathways to enable efficient nitrogen uptake. Gene 2024; 924:148589. [PMID: 38777108 DOI: 10.1016/j.gene.2024.148589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 05/07/2024] [Accepted: 05/17/2024] [Indexed: 05/25/2024]
Abstract
Nitrogen is the principal nutrient deficiency that increases lipids and carbohydrate content in diatoms but negatively affects biomass production. Marine diatom Chaetoceros muelleri is characterized by lipid and carbohydrate accumulation under low nitrogen concentration without affecting biomass. To elucidate the molecular effects of nitrogen concentrations, we performed an RNA-seq analysis of C. muelleri grown under four nitrogen concentrations (3.53 mM, 1.76 mM, 0.44 mM, and 0.18 mM of NaNO3). This research revealed that changes in global transcription in C. muelleri are differentially expressed by nitrogen concentration. "Energetic metabolism", "Carbohydrate metabolism" and "Lipid metabolism" pathways were identified as the most upregulated by N deficiency. Due to N limitation, alternative pathways to self-supply nitrogen employed by microalgal cells were identified. Additionally, nitrogen limitation decreased chlorophyll content and caused a greater response at the transcriptional level with a higher number of unigenes differentially expressed. By contrast, the highest N concentration (3.53 mM) recorded the lowest number of differentially expressed genes. Amt1, Nrt2, Fad2, Skn7, Wrky19, and Dgat2 genes were evaluated by RT-qPCR. In conclusion, C. muelleri modify their metabolic pathways to optimize nitrogen utilization and minimize nitrogen losses. On the other hand, the assembled transcriptome serves as the basis for metabolic engineering focused on improving the quantity and quality of the diatom for biotechnological applications. However, proteomic and metabolomic analysis is also required to compare gene expression, protein, and metabolite accumulation.
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Affiliation(s)
- Damaristelma de Jesús-Campos
- Departamento de Investigaciones Científicas y Tecnológicas de la Universidad de Sonora, Hermosillo-Sonora CP 83000, Mexico
| | - Luis Fernando García-Ortega
- Departamento de Ingeniería Genética, Centro de Investigación y Estudios Avanzados del IPN, Irapuato-Guanajuato Zip Code 36821, Mexico
| | - Diana Fimbres-Olivarría
- Departamento de Investigaciones Científicas y Tecnológicas de la Universidad de Sonora, Hermosillo-Sonora CP 83000, Mexico
| | - Luis Herrera-Estrella
- Institute of Genomics for Crop Abiotic Stress Tolerance, Plant and Soil Science Department, Texas Tech University, 79409 Lubbock, TX, USA; Unidad de Genómica Avanzada/LANGEBIO, Centro de Investigación y Estudios Avanzados del IPN, Irapuato-Guanajuato Zip Code 36821, Mexico
| | - José Antonio López-Elías
- Departamento de Investigaciones Científicas y Tecnológicas de la Universidad de Sonora, Hermosillo-Sonora CP 83000, Mexico.
| | - Corina Hayano-Kanashiro
- Departamento de Investigaciones Científicas y Tecnológicas de la Universidad de Sonora, Hermosillo-Sonora CP 83000, Mexico.
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Pessôa LC, Attar SBE, Sánchez-Zurano A, Ciardi M, Morillas-España A, Ruiz-Martínez C, Fernández I, Arrabal-Campos FM, Pontes LAM, Betania Alves da Silva J, Guimarães Cardoso L, Oliveira de Souza C, Acién G, de Jesus Assis D. Exopolysaccharides as bio-based rheology modifiers from microalgae produced on dairy industry waste: Towards a circular bioeconomy approach. Int J Biol Macromol 2024; 279:135246. [PMID: 39251008 DOI: 10.1016/j.ijbiomac.2024.135246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Revised: 08/14/2024] [Accepted: 08/30/2024] [Indexed: 09/11/2024]
Abstract
The feasibility of exopolysaccharides (EPS) production from cheese whey using Chlorella vulgaris was investigated as an example of circular bioeconomy application. The effects of dairy waste utilization in EPS biosynthesis and rheological properties were evaluated, comparing with both control conditions and commercial xanthan gum (CXG). A twofold increase in yield, up to 0.32 g L-1, was observed when Chlorella vulgaris was used for EPS production from whey rather than conventional fertilizers. Additionally, the EPS produced using cheese whey exhibited superior pseudoplasticity in the 0.4-1.0 (w/v) range compared to the control. The EPS from the whey wastewater contained functional groups similar to those of CXG (82.7 %). Moreover, the solutions containing 1 % biopolymer showed rheological profiles similar to those of the 0.4 % CXG. The molecular weight averages predominantly fell within the range of 284 to 324 kDa, as deduced using diffusion NMR, an innovative and rapid determination method for estimating EPS size. The potential applications of EPS notably extend beyond the dairy industry, reaching diverse market sectors, and thereby enhancing the competitiveness of microalgal biorefineries while contributing to the achievement of Sustainable Development Goals.
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Affiliation(s)
- Luiggi Cavalcanti Pessôa
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil; Senai Cimatec University Center, Environment Department, Salvador, Brazil.
| | - Solaima Belachqer-El Attar
- Department of Chemical Engineering, University of Almería, Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | | | - Martina Ciardi
- Department of Chemical Engineering, University of Almería, Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Ainoa Morillas-España
- Department of Chemical Engineering, University of Almería, Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Cristina Ruiz-Martínez
- Department of Chemistry and Physics, Research Centre CIAIMBITAL, University of Almería, Almería, Spain
| | - Ignacio Fernández
- Department of Chemistry and Physics, Research Centre CIAIMBITAL, University of Almería, Almería, Spain
| | | | - Luiz A M Pontes
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil
| | - Jania Betania Alves da Silva
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil; Center of Science and Technology, Mechanical Engineering Collegiate, Federal University of Recôncavo of Bahia, Cruz Das Almas, Bahia, Brazil
| | - Lucas Guimarães Cardoso
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil; School of Exact and Technological Sciences, University Salvador (UNIFACS), 41820-021, Salvador, Bahia, Brazil
| | - Carolina Oliveira de Souza
- Department of Bromatological Analysis, College of Pharmacy, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Gabriel Acién
- Department of Chemical Engineering, University of Almería, Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Denilson de Jesus Assis
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil; School of Exact and Technological Sciences, University Salvador (UNIFACS), 41820-021, Salvador, Bahia, Brazil.
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4
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Jin X, Fang Y, Li L, Hu M, Fang JKH, Khan FU, Huang W, Wang Y. Physiological responses of the microalga Isochrysis galbana exposed to polystyrene microplastics with different particle sizes. MARINE ENVIRONMENTAL RESEARCH 2024; 200:106645. [PMID: 39013227 DOI: 10.1016/j.marenvres.2024.106645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Revised: 07/05/2024] [Accepted: 07/06/2024] [Indexed: 07/18/2024]
Abstract
Due to continuous increase in marine plastic waste, microplastics are ubiquitous in the marine environment. However, there are few studies on the harmful effects caused by microplastics with different particle sizes, and the interaction between particle size and concentration requires further investigation. This study explored the differences in physiological and biochemical responses, photosynthesis and oxidative stress damage of the microalga Isochrysis galbana exposed to three different particle size microplastics. It was found that different particle sizes and concentrations of microplastics resulted in significant differences (p < 0.05) in the growth rate, photosynthesis, and oxidative stress level of I. galbana. With the decrease of the particle size and lowering concentration of microplastics, the growth rate, photosynthesis and oxidative stress levels of I. galbana were reduced. Significant differences in photosynthesis and oxidative stress levels were observed when I. galbana was exposed to smallest particle size and lowest concentration of microplastics. This study provides new insights about whether polystyrene microplastics of different particle sizes and concentrations exhibit complex effects on microalgae, and explores the underlying reasons for such effects. In short, this study predicts the exacerbating adverse effects of microplastic pollution on the primary productivity, with significant implications for marine food webs and ecosystem health.
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Affiliation(s)
- Xue'en Jin
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China
| | - Yuyang Fang
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China
| | - Li'ang Li
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China
| | - Menghong Hu
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China
| | - James Kar-Hei Fang
- Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, China
| | - Fahim Ullah Khan
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China
| | - Wei Huang
- Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China.
| | - Youji Wang
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China.
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5
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Natarajan L, Jenifer MA, Mukherjee A. Influence of algal-extracellular polymeric substances (EPS) on the pristine and combined toxicity of TiO 2 NPs and PSNPs in Artemia salina: Eco-corona enhances the toxic effects. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 282:116760. [PMID: 39029223 DOI: 10.1016/j.ecoenv.2024.116760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 07/13/2024] [Accepted: 07/16/2024] [Indexed: 07/21/2024]
Abstract
The study on the influence of Natural Organic Matter (NOM) over the individual and combined effects of different nanomaterials on marine species is pertinent. The current study explores the role of Extracellular Polymeric Substances (EPS) in influencing the individual and combined toxic effects of polystyrene nanoplastics (PSNPs) viz. aminated (NH2-PSNPs), carboxylated (COOH-PSNPs), and plain PSNPs and TiO2 NPs in the marine crustacean, Artemia salina. A. salina was interacted with pristine PSNPs, pristine TiO2 NPs, EPS incubated PSNPs, EPS incubated TiO2 NPs, binary mixture of PSNPs and TiO2 NPs, and EPS adsorbed binary mixture of PSNPs and TiO2 NPs for 48 h. The present study proves that, when compared to the pristine toxicity of PSNPs and TiO2 NPs, the coexposure of TiO2 NPs with PSNPs resulted in increased toxicity. The adsorption of algal EPS on the NMs (both in their pristine and combined forms) significantly increased the toxic nature of the NMs against A. salina. It was observed that with an increase in the hydrodynamic diameter of the particles, the mortality, oxidative stress, and ingestion of the NMs by A. salina increased. The uptake of Ti by A. salina from 8 mg/L TiO2 NPs, EPS adsorbed 8 mg/L TiO2 NPs, 8 mg/L TiO2 NPs + NH2-PSNPs and the EPS adsorbed mixture of 8 mg/L TiO2 NPs, 8 mg/L TiO2 NPs + NH2-PSNPs was observed to be 0.043, 0.047, 0.186, and 0.307 mg/g of A. salina. The adsorption of algal EPS on the NMs (both in their pristine and combined forms) significantly increased the toxic nature of the NMs against A. salina. The major outcomes from the current study highlight the role of EPS in exacerbating the toxicity of NMs in marine crustaceans.
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Affiliation(s)
| | - M Annie Jenifer
- VIT School of Agricultural Innovations and Advanced Learning, VIT, Vellore, Tamil Nadu, India.
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6
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Dai D, Gu R, Qv M, Lv Y, Liu D, Tang C, Wang H, Huang L, Zhu L. Performance evaluation of typical flocculants for efficient harvesting of Chlorella sorokiniana under different carbon application modes. CHEMOSPHERE 2024; 361:142563. [PMID: 38851498 DOI: 10.1016/j.chemosphere.2024.142563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 05/29/2024] [Accepted: 06/06/2024] [Indexed: 06/10/2024]
Abstract
In this study, the growth characteristics of microalgae cultured with different carbon sources were analyzed, and the flocculation characteristics under the influence of carbon sources were evaluated using three typical flocculants. The results showed that the organic carbon sources could significantly increase the content of extracellular proteins in microalgae. Specifically, the extracellular protein concentrations of microalgae cultured with pure BG-11, ethanol, sodium acetate and glucose were 18.2 29.2, 97.3, and 34.7 mg/g, respectively. During the flocculation process, microalgae cultured with sodium acetate exhibited a weak response to the flocculant because of excessive extracellular proteins inhibited flocculation. In addition, the flocculation efficiency was also less than 50.0% cultured with sodium acetate in all pH test ranges when alum and chitosan were used as flocculants. It could be inferred that the flocculant initially happened to charge neutralization with the negatively charged proteins in the solution and then bridged the charges with the microalgae. These findings provide insights into the effects of different carbon sources on microalgal flocculation, promising organic integration of microalgae wastewater treatment and harvesting.
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Affiliation(s)
- Dian Dai
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, China
| | - Ruoting Gu
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, China
| | - Mingxiang Qv
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, China
| | - Yuanfei Lv
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, China
| | - Dongyang Liu
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, China
| | - Chunming Tang
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, China
| | - Hanzhi Wang
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, China
| | - Lizhi Huang
- School of Civil Engineering, Wuhan University, Wuhan 430072, China
| | - Liandong Zhu
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, China; State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan, Hubei, 430072, China.
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7
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Gallo G, Imbimbo P, Aulitto M. The Undeniable Potential of Thermophiles in Industrial Processes. Int J Mol Sci 2024; 25:7685. [PMID: 39062928 PMCID: PMC11276739 DOI: 10.3390/ijms25147685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/05/2024] [Accepted: 07/07/2024] [Indexed: 07/28/2024] Open
Abstract
Extremophilic microorganisms play a key role in understanding how life on Earth originated and evolved over centuries. Their ability to thrive in harsh environments relies on a plethora of mechanisms developed to survive at extreme temperatures, pressures, salinity, and pH values. From a biotechnological point of view, thermophiles are considered a robust tool for synthetic biology as well as a reliable starting material for the development of sustainable bioprocesses. This review discusses the current progress in the biomanufacturing of high-added bioproducts from thermophilic microorganisms and their industrial applications.
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Affiliation(s)
- Giovanni Gallo
- Division of Microbiology, Faculty of Biology, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany;
| | - Paola Imbimbo
- Department of Chemical Sciences, University of Napoli Federico II, Complesso Universitario Monte Sant’Angelo, 80126 Napoli, Italy
| | - Martina Aulitto
- Department of Biology, University of Napoli Federico II, Complesso Universitario Monte Sant’Angelo, 80126 Napoli, Italy
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8
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Sousa JF, Amaro HM, Ribeirinho-Soares S, Esteves AF, Salgado EM, Nunes OC, Pires JCM. Native Microalgae-Bacteria Consortia: A Sustainable Approach for Effective Urban Wastewater Bioremediation and Disinfection. Microorganisms 2024; 12:1421. [PMID: 39065189 PMCID: PMC11278754 DOI: 10.3390/microorganisms12071421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Revised: 07/09/2024] [Accepted: 07/10/2024] [Indexed: 07/28/2024] Open
Abstract
Urban wastewater is a significant by-product of human activities. Conventional urban wastewater treatment plants have limitations in their treatment, mainly concerning the low removal efficiency of conventional and emerging contaminants. Discharged wastewater also contains harmful microorganisms, posing risks to public health, especially by spreading antibiotic-resistant bacteria and genes. Therefore, this study assesses the potential of a native microalgae-bacteria system (MBS) for urban wastewater bioremediation and disinfection, targeting NH4+-N and PO43--P removal, coliform reduction, and antibiotic resistance gene mitigation. The MBS showed promising results, including a high specific growth rate (0.651 ± 0.155 d-1) and a significant average removal rate of NH4+-N and PO43--P (9.05 ± 1.24 mg L-1 d-1 and 0.79 ± 0.06 mg L-1 d-1, respectively). Microalgae-induced pH increase rapidly reduces coliforms (r > 0.9), including Escherichia coli, within 3 to 6 days. Notably, the prevalence of intI1 and the antibiotic resistance genes sul1 and blaTEM are significantly diminished, presenting the MBS as a sustainable approach for tertiary wastewater treatment to combat eutrophication and reduce waterborne disease risks and antibiotic resistance spread.
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Affiliation(s)
- Joana F. Sousa
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.F.S.); (H.M.A.); (S.R.-S.); (A.F.E.); (E.M.S.); (O.C.N.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Helena M. Amaro
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.F.S.); (H.M.A.); (S.R.-S.); (A.F.E.); (E.M.S.); (O.C.N.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Sara Ribeirinho-Soares
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.F.S.); (H.M.A.); (S.R.-S.); (A.F.E.); (E.M.S.); (O.C.N.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- LSRE-LCM—Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Ana F. Esteves
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.F.S.); (H.M.A.); (S.R.-S.); (A.F.E.); (E.M.S.); (O.C.N.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- LSRE-LCM—Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Eva M. Salgado
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.F.S.); (H.M.A.); (S.R.-S.); (A.F.E.); (E.M.S.); (O.C.N.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Olga C. Nunes
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.F.S.); (H.M.A.); (S.R.-S.); (A.F.E.); (E.M.S.); (O.C.N.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - José C. M. Pires
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.F.S.); (H.M.A.); (S.R.-S.); (A.F.E.); (E.M.S.); (O.C.N.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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9
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Baldisserotto C, Gessi S, Ferraretto E, Merighi S, Ardondi L, Giacò P, Ferroni L, Nigro M, Travagli A, Pancaldi S. Cultivation modes affect the morphology, biochemical composition, and antioxidant and anti-inflammatory properties of the green microalga Neochloris oleoabundans. PROTOPLASMA 2024:10.1007/s00709-024-01958-7. [PMID: 38864933 DOI: 10.1007/s00709-024-01958-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 05/15/2024] [Indexed: 06/13/2024]
Abstract
Microalgae are considered promising sustainable sources of natural bioactive compounds to be used in biotechnological sectors. In recent years, attention is increasingly given to the search of microalgae-derived compounds with antioxidant and anti-inflammatory properties for nutraceutical or pharmacological issues. In this context, attention is usually focused on the composition and bioactivity of algae or their extracts, while less interest is driven to their biological features, for example, those related to morphology and cultivation conditions. In addition, specific studies on the antioxidant and anti-inflammatory properties of microalgae mainly concern Chlorella or Spirulina. The present work was focused on the characterization of the Chlorophyta Neochloris oleoabundans under two combinations of cultivation modes: autotrophy and glucose-induced mixotrophy, each followed by starvation. Biomass for morphological and biochemical characterization, as well as for extract preparation, was harvested at the end of each cultivation phase. Analyses indicated a different content of the most important classes of bioactive compounds with antioxidant/anti-inflammatory properties (lipids, exo-polysaccharides, pigments, total phenolics, and proteins). In particular, the most promising condition able to prompt the production of antioxidant algal biomass with anti-inflammatory properties was the mixotrophic one. Under mixotrophy, beside an elevated algal biomass production, a strong photosynthetic metabolism with high appression of thylakoid membranes and characteristics of high photo-protection from oxidative damage was observed and linked to the overproduction of exo-polysaccharides and lipids rather than pigments. Overall, mixotrophy appears a good choice to produce natural bioactive extracts, potentially well tolerated by human metabolism and environmentally sustainable.
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Affiliation(s)
- C Baldisserotto
- Department of Environmental and Prevention Sciences, University of Ferrara, C.So Ercole I d'Este, 32, 44121, Ferrara, Italy
| | - S Gessi
- Department of Translational Medicine, University of Ferrara, Via Fossato Di Mortara, 17-19, 44121, Ferrara, Italy
| | - E Ferraretto
- Department of Environmental and Prevention Sciences, University of Ferrara, C.So Ercole I d'Este, 32, 44121, Ferrara, Italy
- Department of Translational Medicine, University of Ferrara, Via Fossato Di Mortara, 17-19, 44121, Ferrara, Italy
| | - S Merighi
- Department of Translational Medicine, University of Ferrara, Via Fossato Di Mortara, 17-19, 44121, Ferrara, Italy
| | - L Ardondi
- Department of Environmental and Prevention Sciences, University of Ferrara, C.So Ercole I d'Este, 32, 44121, Ferrara, Italy
| | - P Giacò
- Department of Environmental and Prevention Sciences, University of Ferrara, C.So Ercole I d'Este, 32, 44121, Ferrara, Italy
| | - L Ferroni
- Department of Environmental and Prevention Sciences, University of Ferrara, C.So Ercole I d'Este, 32, 44121, Ferrara, Italy
| | - M Nigro
- Department of Translational Medicine, University of Ferrara, Via Fossato Di Mortara, 17-19, 44121, Ferrara, Italy
| | - A Travagli
- Department of Translational Medicine, University of Ferrara, Via Fossato Di Mortara, 17-19, 44121, Ferrara, Italy
| | - S Pancaldi
- Department of Environmental and Prevention Sciences, University of Ferrara, C.So Ercole I d'Este, 32, 44121, Ferrara, Italy.
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10
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Shin Y, Kim HJ, Choi TR, Oh SJ, Kim S, Lee Y, Choi S, Oh J, Kim SY, Lee YS, Choi YH, Bhatia SK, Yang YH. Identification of Oil-Loving Cupriavidus necator BM3-1 for Polyhydroxyalkanoate Production and Assessing Contribution of Exopolysaccharide for Vegetable Oil Utilization. Polymers (Basel) 2024; 16:1639. [PMID: 38931989 PMCID: PMC11207330 DOI: 10.3390/polym16121639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 05/22/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
Polyhydroxyalkanoates (PHA) have received attention owing to their biodegradability and biocompatibility, with studies exploring PHA-producing bacterial strains. As vegetable oil provides carbon and monomer precursors for poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(3HB-co-3HHx)), oil-utilizing strains may facilitate PHA production. Herein, Cupriavidus necator BM3-1, which produces 11.1 g/L of PHB with 5% vegetable oil, was selected among various novel Cupriavidus necator strains. This strain exhibited higher preference for vegetable oils over sugars, with soybean oil and tryptone determined to be optimal sources for PHA production. BM3-1 produced 33.9 g/L of exopolysaccharides (EPS), which was three-fold higher than the amount produced by H16 (10.1 g/L). EPS exhibited 59.7% of emulsification activity (EI24), higher than that of SDS and of EPS from H16 with soybean oil. To evaluate P(3HB-co-3HHx) production from soybean oil, BM3-1 was engineered with P(3HB-co-3HHx) biosynthetic genes (phaCRa, phaARe, and phaJPa). BM3-1/pPhaCJ produced 3.5 mol% of 3HHx and 37.1 g/L PHA. BM3-1/pCB81 (phaCAJ) produced 32.8 g/L PHA, including 5.9 mol% 3HHx. Physical and thermal analyses revealed that P(3HB-co-5.9 mol% 3HHx) was better than PHB. Collectively, we identified a novel strain with high vegetable oil utilization capacity for the production of EPS, with the option to engineer the strain for P(3HB-co-3HHx).
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Affiliation(s)
- Yuni Shin
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.S.); (H.J.K.); (T.-R.C.); (S.J.O.); (S.K.); (Y.L.); (S.C.); (J.O.); (S.K.B.)
| | - Hyun Joong Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.S.); (H.J.K.); (T.-R.C.); (S.J.O.); (S.K.); (Y.L.); (S.C.); (J.O.); (S.K.B.)
| | - Tae-Rim Choi
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.S.); (H.J.K.); (T.-R.C.); (S.J.O.); (S.K.); (Y.L.); (S.C.); (J.O.); (S.K.B.)
| | - Suk Jin Oh
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.S.); (H.J.K.); (T.-R.C.); (S.J.O.); (S.K.); (Y.L.); (S.C.); (J.O.); (S.K.B.)
| | - Suwon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.S.); (H.J.K.); (T.-R.C.); (S.J.O.); (S.K.); (Y.L.); (S.C.); (J.O.); (S.K.B.)
| | - Yeda Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.S.); (H.J.K.); (T.-R.C.); (S.J.O.); (S.K.); (Y.L.); (S.C.); (J.O.); (S.K.B.)
| | - Suhye Choi
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.S.); (H.J.K.); (T.-R.C.); (S.J.O.); (S.K.); (Y.L.); (S.C.); (J.O.); (S.K.B.)
| | - Jinok Oh
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.S.); (H.J.K.); (T.-R.C.); (S.J.O.); (S.K.); (Y.L.); (S.C.); (J.O.); (S.K.B.)
| | - So Yeon Kim
- Innovation Center, Lotte Chemical Ltd., Seoul 07594, Republic of Korea; (S.Y.K.); (Y.S.L.); (Y.H.C.)
| | - Young Sik Lee
- Innovation Center, Lotte Chemical Ltd., Seoul 07594, Republic of Korea; (S.Y.K.); (Y.S.L.); (Y.H.C.)
| | - Young Heon Choi
- Innovation Center, Lotte Chemical Ltd., Seoul 07594, Republic of Korea; (S.Y.K.); (Y.S.L.); (Y.H.C.)
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.S.); (H.J.K.); (T.-R.C.); (S.J.O.); (S.K.); (Y.L.); (S.C.); (J.O.); (S.K.B.)
- Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul 05029, Republic of Korea
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.S.); (H.J.K.); (T.-R.C.); (S.J.O.); (S.K.); (Y.L.); (S.C.); (J.O.); (S.K.B.)
- Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul 05029, Republic of Korea
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11
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Minari GD, Piazza RD, Sass DC, Contiero J. EPS Production by Lacticaseibacillus casei Using Glycerol, Glucose, and Molasses as Carbon Sources. Microorganisms 2024; 12:1159. [PMID: 38930541 PMCID: PMC11205391 DOI: 10.3390/microorganisms12061159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/24/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
This study demonstrates that Lactobacillus can produce exopolysaccharides (EPSs) using alternative carbon sources, such as sugarcane molasses and glycerol. After screening 22 strains of Lactobacillus to determine which achieved the highest production of EPS based on dry weight at 37 °C, the strain Ke8 (L. casei) was selected for new experiments. The EPS obtained using glycerol and glucose as carbon sources was classified as a heteropolysaccharide composed of glucose and mannose, containing 1730 g.mol-1, consisting of 39.4% carbohydrates and 18% proteins. The EPS obtained using molasses as the carbon source was characterized as a heteropolysaccharide composed of glucose, galactose, and arabinose, containing 1182 g.mol-1, consisting of 52.9% carbohydrates and 11.69% proteins. This molecule was characterized using Size Exclusion Chromatography (HPLC), Gas chromatography-mass spectrometry (GC-MS), Fourier-transform infrared spectroscopy (FTIR), and proton nuclear magnetic resonance spectroscopy (1H-NMR). The existence of polysaccharides was confirmed via FT-IR and NMR analyses. The results obtained suggest that Lacticaseibacillus casei can grow in media that use alternative carbon sources such as glycerol and molasses. These agro-industry residues are inexpensive, and their use contributes to sustainability. The lack of studies regarding the use of Lacticaseibacillus casei for the production of EPS using renewable carbon sources from agroindustry should be noted.
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Affiliation(s)
- Guilherme Deomedesse Minari
- Institute of Biosciences, São Paulo State University (Unesp), Rio Claro 13506-900, Brazil; (G.D.M.); (D.C.S.)
| | - Rodolfo Debone Piazza
- Institute of Chemistry, São Paulo State University (Unesp), Araraquara 14800-903, Brazil;
| | - Daiane Cristina Sass
- Institute of Biosciences, São Paulo State University (Unesp), Rio Claro 13506-900, Brazil; (G.D.M.); (D.C.S.)
| | - Jonas Contiero
- Institute of Biosciences, São Paulo State University (Unesp), Rio Claro 13506-900, Brazil; (G.D.M.); (D.C.S.)
- Institute on Research in Bioenergy, São Paulo State University (Unesp), Rio Claro 13500-230, Brazil
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12
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Hosseini SP, Mousavi SM, Jafari A. Exploring biosynthesis strategies to boost the yield of exopolysaccharide-protein blend from Bacillus arachidis SY8(T), an isolated native strain, as a potent adsorbent for heavy metals removal. Int J Biol Macromol 2024; 271:132634. [PMID: 38797297 DOI: 10.1016/j.ijbiomac.2024.132634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 04/30/2024] [Accepted: 05/23/2024] [Indexed: 05/29/2024]
Abstract
This investigation centers on the synthesis of a polysaccharide-protein blend produced by an isolated native strain (99.12 % phylogenetic affinity with Bacillus arachidis SY8(T)). The primary objective was to investigate the production of extracellular polymeric substances (EPS) under diverse stress conditions, encompassing exposure to heavy metal ions, salt, and toxic agents. Additionally, the impact of environmental parameters, namely pH, inoculation percentage, and time, on the production was investigated. Subsequently, the study examined the biosorption potential of the EPS produced for Pb(II), Cu(II), and Mn(II). The EPS obtained was thoroughly characterized via various tests. Rheological evaluations of an EPS solution (2 wt%) confirmed its pseudo-plastic and non-Newtonian fluid properties, while TGA analysis demonstrated its thermal stability up to 600 °C. Additional analyses, including GPC, FTIR, and H-NMR, provide further insights into the produced EPS. The best conditions for EPS production are determined: 5 % NaCl salt, serving as an effective stress inducer, and 37 °C, pH 6, with a 5 % inoculation, over 96 h. EPS demonstrates remarkable removal efficiencies of 99.9, 99.4 and 78.9 % for Pb(II), Cu(II), and Mn(II), respectively. These findings highlight the potential of EPS as an effective agent for removing heavy metal ions.
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Affiliation(s)
- Seyedeh Parvin Hosseini
- Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran
| | - Seyyed Mohammad Mousavi
- Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran; Modares Environmental Research Institute, Tarbiat Modares University, Tehran, Iran.
| | - Arezou Jafari
- Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran.
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13
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Li L, Chai W, Sun C, Huang L, Sheng T, Song Z, Ma F. Role of microalgae-bacterial consortium in wastewater treatment: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 360:121226. [PMID: 38795468 DOI: 10.1016/j.jenvman.2024.121226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 04/17/2024] [Accepted: 05/21/2024] [Indexed: 05/28/2024]
Abstract
In the global effort to reduce CO2 emissions, the concurrent enhancement of pollutant degradation and reductions in fossil fuel consumption are pivotal aspects of microalgae-mediated wastewater treatment. Clarifying the degradation mechanisms of bacteria and microalgae during pollutant treatment, as well as regulatory biolipid production, could enhance process sustainability. The synergistic and inhibitory relationships between microalgae and bacteria are introduced in this paper. The different stimulators that can regulate microalgal biolipid accumulation are also reviewed. Wastewater treatment technologies that utilize microalgae and bacteria in laboratories and open ponds are described to outline their application in treating heavy metal-containing wastewater, animal husbandry wastewater, pharmaceutical wastewater, and textile dye wastewater. Finally, the major requirements to scale up the cascade utilization of biomass and energy recovery are summarized to improve the development of biological wastewater treatment.
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Affiliation(s)
- Lixin Li
- School of Environment and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, 150022, China.
| | - Wei Chai
- School of Environment and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, 150022, China
| | - Caiyu Sun
- School of Environment and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, 150022, China
| | - Linlin Huang
- School of Environment and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, 150022, China
| | - Tao Sheng
- School of Environment and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, 150022, China
| | - Zhiwei Song
- School of Environment and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, 150022, China
| | - Fang Ma
- State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
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14
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Nazloo EK, Danesh M, Sarrafzadeh MH, Moheimani NR, Ennaceri H. Biomass and hydrocarbon production from Botryococcus braunii: A review focusing on cultivation methods. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171734. [PMID: 38508258 DOI: 10.1016/j.scitotenv.2024.171734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 03/13/2024] [Accepted: 03/13/2024] [Indexed: 03/22/2024]
Abstract
Botryococcus braunii has garnered significant attention in recent years due to its ability to produce high amounts of renewable hydrocarbons through photosynthesis. As the world shifts towards a greener future and seeks alternative sources of energy, the cultivation of B. braunii and the extraction of its hydrocarbons can potentially provide a viable solution. However, the development of a sustainable and cost-effective process for cultivating B. braunii is not without challenges. Compared to other microalgae, B. braunii grows very slowly, making it time-consuming and expensive to produce biomass. In response to these challenges, several efforts have been put into optimizing Botryococcus braunii cultivation systems to increase biomass growth and hydrocarbon production efficiency. This review presents a comparative analysis of different Botryococcus braunii cultivation systems, and the factors affecting the productivity of biomass and hydrocarbon in Botryococcus braunii are critically discussed. Attached microalgal growth offers several advantages that hold significant potential for enhancing the economic viability of microalgal fuels. Here, we propose that employing attached growth cultivation, coupled with the milking technique for hydrocarbon extraction, represents an efficient approach for generating renewable fuels from B. braunii. Nevertheless, further research is needed to ascertain the viability of large-scale implementation.
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Affiliation(s)
- Ehsan Khorshidi Nazloo
- UNESCO Chair on Water Reuse, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Moslem Danesh
- UNESCO Chair on Water Reuse, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran; Department of Petroleum Drilling and Refining, Kurdistan Technical Institute Sulaimaniya, Iraq; Department of Biomedical Engineering, Qaiwan International University, Sulaimaniya, Iraq
| | - Mohammad-Hossein Sarrafzadeh
- UNESCO Chair on Water Reuse, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Navid Reza Moheimani
- Algae R&D Centre, Murdoch University, Murdoch, Western Australia 6150, Australia; Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Perth 6150, Australia
| | - Houda Ennaceri
- Algae R&D Centre, Murdoch University, Murdoch, Western Australia 6150, Australia; Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Perth 6150, Australia.
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15
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Silva C, Santos JI, Vidal T, Silva S, Almeida SFP, Gonçalves FJM, Abrantes N, Pereira JL. Potential effects of the discharge of wastewater treatment plant (WWTP) effluents in benthic communities: evidence from three distinct WWTP systems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:34492-34506. [PMID: 38709406 PMCID: PMC11136724 DOI: 10.1007/s11356-024-33462-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 04/21/2024] [Indexed: 05/07/2024]
Abstract
Wastewater treatment plant (WWTP) effluents can be sources of environmental contamination. In this study, we aimed to understand whether effluents of three different WWTPs may have ecological effects in riverine recipient ecosystems. To achieve this, we assessed benthic phytobenthos and macroinvertebrate communities at three different locations relative to the effluent discharge: immediately upstream, immediately downstream and 500-m downstream the effluent discharge. Two approaches were employed: the ecological status classification as defined in the Water Framework Directive (WFD) based on biological indicators; constrained multivariate analysis to disentangle the environmental drivers (physicochemical variables and contaminants, namely metals, polycyclic aromatic hydrocarbons, pharmaceuticals, and personal care products) of ecological changes across the study sites. The results showed inconsistencies between the WFD approach and the multivariate approach, as well as between the responses of macroinvertebrates and diatoms. The WWTP effluents impacted benthic communities in a single case: macroinvertebrates were negatively affected by one of the WWTP effluents, likely by the transported pharmaceuticals (other stressors are essentially homogeneous among sites). Given the findings and the scarcity of consistent evidence on ecological impacts that WWTP effluents may have in recipient ecosystems, further research is needed towards more sustainable regulation and linked environmental protection measures.
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Affiliation(s)
- Carlos Silva
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
- Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Joana Isabel Santos
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
- Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Tânia Vidal
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
- Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Susana Silva
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Salomé Fernandes Pinheiro Almeida
- Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
- GeoBioTec - Geobiociências, Geotecnologias E Geo-Engenharias, University of Aveiro, Aveiro, Portugal
| | - Fernando José Mendes Gonçalves
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
- Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Nelson Abrantes
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
- Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Joana Luísa Pereira
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.
- Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.
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16
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Zhu Y, Chen Y, An G, Zhang C, Yang J, Yang R, Chen G, Yang Y. Significance of homogeneous operation in light-assisted fixed-bed bioprocess under ammonia stress: Optimization, long-term operation and metagenomic analysis. BIORESOURCE TECHNOLOGY 2024; 399:130568. [PMID: 38467264 DOI: 10.1016/j.biortech.2024.130568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/08/2024] [Accepted: 03/08/2024] [Indexed: 03/13/2024]
Abstract
Activating microbes with light is a promising strategy for addressing ammonia-stressed anaerobic digestion (AD). However, as a critical in-process parameter, homogenous operation, in light-assisted AD amended by bio-fixed bed has received limited attention. This research endeavors to establish a uniform-illuminated biosystem and assess its practical feasibility through a 90-day semi-continuous operation at pilot scale under solar light illumination. With optimal stirring mode (intermittent stirring for 3 min every 15 min), robust methane yields were achieved across various organic loads, reaching 88.7-94.3% of theoretical yield under high ammonium stress (3500 mg/L). The metagenomic analysis unveiled that uniform illumination triggered synergistic effects in AD, fostering a diversified microbial consortium, enhancing carbohydrate and methane metabolism, and facilitating the formation of an electroactive bio-cluster. This study underscores the significance of homogenous illumination in AD systems for efficient waste-to-energy conversion, highlighting the implementation of solar light as a greener approach for scale-up application.
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Affiliation(s)
- Yunxin Zhu
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Yujia Chen
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Guangqi An
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Cheng Zhang
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Jingwei Yang
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Rongyong Yang
- Shanghai High Victory Science and Technology Co., Ltd., 4688 Jinshan Avenue, Shanghai 201512, China
| | - Guoping Chen
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yingnan Yang
- Graduate School of Life and Environmental Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
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17
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Pichaiyotinkul P, Leksingto J, Sukkasam N, In-Na P, Incharoensakdi A, Monshupanee T. Erythromycin mediates co-flocculation between cyanobacterium Synechocystis sp. PCC 6803 and filamentous fungi in liquid cultivation without organic compounds. Sci Rep 2024; 14:9640. [PMID: 38671026 PMCID: PMC11053131 DOI: 10.1038/s41598-024-60016-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
Photoautotrophic cyanobacteria assimilate the greenhouse gas carbon dioxide as their sole carbon source for producing useful bioproducts. However, harvesting the cells from their liquid media is a major bottleneck in the process. Thus, an easy-to-harvest method, such as auto-flocculation, is desirable. Here, we found that cyanobacterium Synechocystis sp. PCC 6803 co-flocculated with a natural fungal contamination in the presence of the antibiotic erythromycin (EM) but not without EM. The fungi in the co-flocculated biomass were isolated and found to consist of five species with the filamentous Purpureocillium lilacinum and Aspergillus protuberus making up 71% of the overall fungal population. The optimal co-cultivation for flocculation was an initial 5 mg (fresh weight) of fungi, an initial cell density of Synechocystis of 0.2 OD730, 10 µM EM, and 14 days of cultivation in 100 mL of BG11 medium with no organic compound. This yielded 248 ± 28 mg/L of the Synechocystis-fungi flocculated biomass from 560 ± 35 mg/L of total biomass, a 44 ± 2% biomass flocculation efficiency. Furthermore, the EM treated Synechocystis cells in the Synechocystis-fungi flocculate had a normal cell color and morphology, while those in the axenic suspension exhibited strong chlorosis. Thus, the occurrence of the Synechocystis-fungi flocculation was mediated by EM, and the co-flocculation with the fungi protected Synechocystis against the development of chlorosis. Transcriptomic analysis suggested that the EM-mediated co-flocculation was a result of down-regulation of the minor pilin genes and up-regulation of several genes including the chaperone gene for pilin regulation, the S-layer protein genes, the exopolysaccharide-polymerization gene, and the genes for signaling proteins involved in cell attachment and abiotic-stress responses. The CuSO4 stress can also mediate Synechocystis-fungi flocculation but at a lower flocculation efficiency than that caused by EM. The EM treatment may be applied in the co-culture between other cyanobacteria and fungi to mediate cell bio-flocculation.
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Affiliation(s)
| | - Jidapa Leksingto
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Nannaphat Sukkasam
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Pichaya In-Na
- Research Unit on Sustainable Algal Cultivation and Applications, Chulalongkorn University, Bangkok, 10330, Thailand
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Aran Incharoensakdi
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
- Academy of Science, Royal Society of Thailand, Bangkok, 10300, Thailand
| | - Tanakarn Monshupanee
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
- Research Unit on Sustainable Algal Cultivation and Applications, Chulalongkorn University, Bangkok, 10330, Thailand.
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18
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Elleuch J, Drira M, Ghribi I, Hadjkacem F, Pierre G, Khemakhem H, Michaud P, Fendri I, Abdelkafi S. Lead removal from the aqueous solution by extracellular polymeric substances produced by the marine diatom Navicula salinicola. ENVIRONMENTAL TECHNOLOGY 2024:1-13. [PMID: 38619982 DOI: 10.1080/09593330.2024.2338456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 03/27/2024] [Indexed: 04/17/2024]
Abstract
Microbial extracellular polymeric substances (EPS) have recently emerged as significant contributors in diverse biotechnological applications. Extracellular polymeric substances (EPS), produced by a Navicula salinicola strain, have been studied for potential applications in a specific heavy metal (lead (Pb II)) removal from wastewater. The optimisation of operational parameters, mainly pH, Pb and EPS concentrations, using the Box-Behnken design (BBD) was undertaken to enhance lead uptake. The higher Pb adsorption capacity reached 2211.029 mg/g. Hydroxyl, carbonyl, carboxyl, phosphoric, and sulfhydryl groups were identified quantitatively as potential sites for Pb adsorption. EPS exhibited a notable flocculation rate of 70.20% in kaolin clay at a concentration of 15 mg/L. They demonstrated an emulsifying activity greater than 88%, showcasing their versatile potential for both sedimentation processes and stabilising liquid-liquid systems. EPS could be excellent nonconventional renewable biopolymers for treating water and wastewater.
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Affiliation(s)
- Jihen Elleuch
- Laboratoire de Génie Enzymatique et Microbiologie, Equipe de Biotechnologie des Algues, Ecole Nationale d'Ingénieurs de Sfax, University of Sfax, Sfax, Tunisia
| | - Marwa Drira
- Laboratory of Biotechnology and Plant Improvement, Center of Biotechnology of Sfax, Sfax, Tunisia
| | - Imtinen Ghribi
- Laboratory of Plant Biotechnologies Applied to the Improvement of Plants, Faculty of Sciences of Sfax, University of Sfax, Sfax, Tunisia
| | - Farah Hadjkacem
- Laboratoire de Génie Enzymatique et Microbiologie, Equipe de Biotechnologie des Algues, Ecole Nationale d'Ingénieurs de Sfax, University of Sfax, Sfax, Tunisia
- CNRS, Clermont Auvergne INP, Institute Pascal, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Guillaume Pierre
- CNRS, Clermont Auvergne INP, Institute Pascal, Université Clermont Auvergne, Clermont-Ferrand, France
- Laboratory of Multifunctional Materials and Applications (LaMMA), (LR16ES18), Faculty of Sciences of Sfax, University of Sfax, Sfax, Tunisia
| | | | - Philippe Michaud
- CNRS, Clermont Auvergne INP, Institute Pascal, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Imen Fendri
- Laboratory of Plant Biotechnologies Applied to the Improvement of Plants, Faculty of Sciences of Sfax, University of Sfax, Sfax, Tunisia
| | - Slim Abdelkafi
- Laboratoire de Génie Enzymatique et Microbiologie, Equipe de Biotechnologie des Algues, Ecole Nationale d'Ingénieurs de Sfax, University of Sfax, Sfax, Tunisia
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19
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Aditya L, Vu HP, Johir MAH, Mao S, Ansari A, Fu Q, Nghiem LD. Synthesizing cationic polymers and tuning their properties for microalgae harvesting. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 917:170423. [PMID: 38281644 DOI: 10.1016/j.scitotenv.2024.170423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/09/2024] [Accepted: 01/23/2024] [Indexed: 01/30/2024]
Abstract
This study reports a facile technique to synthesize and tune the cationic polymer, poly(3-acrylamidopropyl)trimethylammonium chloride (PAPTAC), in terms of molecular weight and surface change for harvesting three microalgae species (Scenedesmus sp., P.purpureum, and C. vulgaris). The PAPTAC polymer was synthesised by UV-induced free-radical polymerisation. Polymer tuning was demonstrated by regulating the monomer concentration (60 to 360 mg/mL) and UV power (36 and 60 W) for polymerisation. The obtained PAPTAC polymer was evaluated for harvesting three different microalgae species and compared to a commercially available polymer. The highest flocculation efficiency for Scenedesmus sp. and P. purpureum was observed at a dosage of 25 mg-polymer/g of dry biomass by using PAPTAC-90, resulting in higher flocculation efficiency than the commercial polymer. Results in this study show evidence of effective neutralisation of the negative charge surface of microalgae cells by the produced cationic PAPTAC polymer and polymer bridging for effective flocculation. The obtained PAPTAC polymer was less effective for harvesting C. vulgaris, possibly due to other factors such as cell morphology and composition of extracellular polymeric substances of at the cell membrane that may also influence harvesting performance.
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Affiliation(s)
- Lisa Aditya
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2220, Australia
| | - Hang P Vu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2220, Australia
| | - Md Abu Hasan Johir
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2220, Australia
| | - Shudi Mao
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2220, Australia
| | - Ashley Ansari
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2220, Australia
| | - Qiang Fu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2220, Australia.
| | - Long D Nghiem
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2220, Australia.
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20
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Debnath S, Muthuraj M, Bandyopadhyay TK, Bobby MN, Vanitha K, Tiwari ON, Bhunia B. Engineering strategies and applications of cyanobacterial exopolysaccharides: A review on past achievements and recent perspectives. Carbohydr Polym 2024; 328:121686. [PMID: 38220318 DOI: 10.1016/j.carbpol.2023.121686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 11/08/2023] [Accepted: 12/08/2023] [Indexed: 01/16/2024]
Abstract
Cyanobacteria are ideally suited for developing sustainable biological products but are underdeveloped due to a lack of genetic tools. Exopolysaccharide (EPS) is one of the essential bioproducts with widespread industrial applications. Despite their unique structural characteristics associated with distinct biological and physicochemical aspects, EPS from cyanobacteria has been underexplored. However, it is expected to accelerate in the near future due to the utilization of low-cost cyanobacterial platforms and readily available information on the structural data and specific features of these biopolymers. In recent years, cyanobacterial EPSs have attracted growing scientific attention due to their simple renewability, rheological characteristics, massive production, and potential uses in several biotechnology domains. This review focuses on the most recent research on potential new EPS producers and their distinct compositions responsible for novel biological activities. Additionally, nutritional and process parameters discovered recently for enhancing EPS production and engineering strategies applied currently to control the biosynthetic pathway for enhanced EPS production are critically highlighted. The process intensification of previously developed EPS extraction and purification processes from cyanobacterial biomass is also extensively explained. Furthermore, the newly reported biotechnological applications of cyanobacterial exopolysaccharides are also discussed.
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Affiliation(s)
- Shubhankar Debnath
- Bioproducts Processing Research Laboratory (BPRL), Department of Bio Engineering, National Institute of Technology, Agartala 799046, India
| | - Muthusivaramapandian Muthuraj
- Bioproducts Processing Research Laboratory (BPRL), Department of Bio Engineering, National Institute of Technology, Agartala 799046, India.
| | | | - Md Nazneen Bobby
- Department of Biotechnology, Vignan's Foundation for Science Technology and Research, Guntur 522213, Andhra Pradesh, India
| | - Kondi Vanitha
- Department of Pharmaceutics, Vishnu Institute of Pharmaceutical Education and Research, Narsapur, Medak, Telangana, India
| | - Onkar Nath Tiwari
- Centre for Conservation and Utilization of Blue Green Algae, Division of Microbiology, Indian Agricultural Research Institute (ICAR), New Delhi 110012, India.
| | - Biswanath Bhunia
- Bioproducts Processing Research Laboratory (BPRL), Department of Bio Engineering, National Institute of Technology, Agartala 799046, India.
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21
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Wang FQ, Bartosik D, Sidhu C, Siebers R, Lu DC, Trautwein-Schult A, Becher D, Huettel B, Rick J, Kirstein IV, Wiltshire KH, Schweder T, Fuchs BM, Bengtsson MM, Teeling H, Amann RI. Particle-attached bacteria act as gatekeepers in the decomposition of complex phytoplankton polysaccharides. MICROBIOME 2024; 12:32. [PMID: 38374154 PMCID: PMC10877868 DOI: 10.1186/s40168-024-01757-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 01/04/2024] [Indexed: 02/21/2024]
Abstract
BACKGROUND Marine microalgae (phytoplankton) mediate almost half of the worldwide photosynthetic carbon dioxide fixation and therefore play a pivotal role in global carbon cycling, most prominently during massive phytoplankton blooms. Phytoplankton biomass consists of considerable proportions of polysaccharides, substantial parts of which are rapidly remineralized by heterotrophic bacteria. We analyzed the diversity, activity, and functional potential of such polysaccharide-degrading bacteria in different size fractions during a diverse spring phytoplankton bloom at Helgoland Roads (southern North Sea) at high temporal resolution using microscopic, physicochemical, biodiversity, metagenome, and metaproteome analyses. RESULTS Prominent active 0.2-3 µm free-living clades comprised Aurantivirga, "Formosa", Cd. Prosiliicoccus, NS4, NS5, Amylibacter, Planktomarina, SAR11 Ia, SAR92, and SAR86, whereas BD1-7, Stappiaceae, Nitrincolaceae, Methylophagaceae, Sulfitobacter, NS9, Polaribacter, Lentimonas, CL500-3, Algibacter, and Glaciecola dominated 3-10 µm and > 10 µm particles. Particle-attached bacteria were more diverse and exhibited more dynamic adaptive shifts over time in terms of taxonomic composition and repertoires of encoded polysaccharide-targeting enzymes. In total, 305 species-level metagenome-assembled genomes were obtained, including 152 particle-attached bacteria, 100 of which were novel for the sampling site with 76 representing new species. Compared to free-living bacteria, they featured on average larger metagenome-assembled genomes with higher proportions of polysaccharide utilization loci. The latter were predicted to target a broader spectrum of polysaccharide substrates, ranging from readily soluble, simple structured storage polysaccharides (e.g., laminarin, α-glucans) to less soluble, complex structural, or secreted polysaccharides (e.g., xylans, cellulose, pectins). In particular, the potential to target poorly soluble or complex polysaccharides was more widespread among abundant and active particle-attached bacteria. CONCLUSIONS Particle-attached bacteria represented only 1% of all bloom-associated bacteria, yet our data suggest that many abundant active clades played a pivotal gatekeeping role in the solubilization and subsequent degradation of numerous important classes of algal glycans. The high diversity of polysaccharide niches among the most active particle-attached clades therefore is a determining factor for the proportion of algal polysaccharides that can be rapidly remineralized during generally short-lived phytoplankton bloom events. Video Abstract.
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Grants
- AM 73/9-3 Deutsche Forschungsgemeinschaft,Germany
- SCHW 595/10-3 Deutsche Forschungsgemeinschaft,Germany
- TE 813/2-3 Deutsche Forschungsgemeinschaft,Germany
- RI 969/9-2 Deutsche Forschungsgemeinschaft,Germany
- BE 3869/4-3 Deutsche Forschungsgemeinschaft,Germany
- SCHW 595/11-3 Deutsche Forschungsgemeinschaft,Germany
- FU 627/2-3 Deutsche Forschungsgemeinschaft,Germany
- RI 969/9-2 Deutsche Forschungsgemeinschaft,Germany
- TE 813/2-3 Deutsche Forschungsgemeinschaft,Germany
- AM 73/9-3 Deutsche Forschungsgemeinschaft,Germany
- AWI_BAH_o 1 Biological Station Helgoland, Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research
- AWI_BAH_o 1 Biological Station Helgoland, Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research
- Max Planck Institute for Marine Microbiology (2)
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Affiliation(s)
- Feng-Qing Wang
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Daniel Bartosik
- Institute of Pharmacy, University of Greifswald, Felix-Hausdorff-Straße 3, 17489, Greifswald, Germany
- Institute of Marine Biotechnology, Walther-Rathenau-Straße 49a, 17489, Greifswald, Germany
| | - Chandni Sidhu
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Robin Siebers
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Straße 8, 17489, Greifswald, Germany
| | - De-Chen Lu
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
- Marine College, Shandong University, Weihai, 264209, China
| | - Anke Trautwein-Schult
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Straße 8, 17489, Greifswald, Germany
| | - Dörte Becher
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Straße 8, 17489, Greifswald, Germany
| | - Bruno Huettel
- Max Planck Genome Centre Cologne, Carl von Linné-Weg 10, 50829, Cologne, Germany
| | - Johannes Rick
- Alfred Wegener Institute for Polar and Marine Research, Biologische Anstalt Helgoland, Helgoland, 27483, Germany
| | - Inga V Kirstein
- Alfred Wegener Institute for Polar and Marine Research, Biologische Anstalt Helgoland, Helgoland, 27483, Germany
| | - Karen H Wiltshire
- Alfred Wegener Institute for Polar and Marine Research, Biologische Anstalt Helgoland, Helgoland, 27483, Germany
| | - Thomas Schweder
- Institute of Pharmacy, University of Greifswald, Felix-Hausdorff-Straße 3, 17489, Greifswald, Germany
- Institute of Marine Biotechnology, Walther-Rathenau-Straße 49a, 17489, Greifswald, Germany
| | - Bernhard M Fuchs
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Mia M Bengtsson
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Straße 8, 17489, Greifswald, Germany.
| | - Hanno Teeling
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany.
| | - Rudolf I Amann
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany.
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22
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Zhang S, Cao J, Zheng Y, Hou M, Song L, Na J, Jiang Y, Huang Y, Liu T, Wei H. Insight into coagulation/flocculation mechanisms on microalgae harvesting by ferric chloride and polyacrylamide in different growth phases. BIORESOURCE TECHNOLOGY 2024; 393:130082. [PMID: 38006984 DOI: 10.1016/j.biortech.2023.130082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/18/2023] [Accepted: 11/19/2023] [Indexed: 11/27/2023]
Abstract
FeCl3 and polyacrylamide (PAM) had been used to investigate the effect of coagulation, flocculation, and their combination on algae cells and extracellular organic matter (EOM) at different phases. PAM tended to aggregate particle-like substances, while FeCl3 could interact with EOM. The content of EOM kept rising during the algae growth cycle, while OD680 peaked at about 3.0. At stationary phase Ⅰ, the removal efficiencies of UV254, turbidity and OD680 of the suspension conditioned with FeCl3 + PAM reached (88.08 ± 0.89)%, (89.72 ± 0.36)% and (93.99 ± 0.05)%, respectively. Nevertheless, PAM + FeCl3 exhibited the worst efficiency because of the release of EOM caused by the turbulence. The results suggested that algal cells served as a coagulation aid to facilitate floc formation, while excessive EOM deteriorated harvesting performance. The process of FeCl3 + PAM at stationary phase Ⅰ appears to be a promising technology for microalgae harvesting.
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Affiliation(s)
- Siqi Zhang
- School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Jingyi Cao
- School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Yajiao Zheng
- School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Meifang Hou
- School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Lili Song
- School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Jiandie Na
- School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Yiqiang Jiang
- School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Yichen Huang
- School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Tianyi Liu
- School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China
| | - Hua Wei
- School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China.
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23
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Lu Z, Cheng X, Xie J, Li Z, Li X, Jiang X, Zhu D. Iron-based multi-carbon composite and Pseudomonas furukawaii ZS1 co-affect nitrogen removal, microbial community dynamics and metabolism pathways in low-temperature aquaculture wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 349:119471. [PMID: 37913618 DOI: 10.1016/j.jenvman.2023.119471] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/03/2023]
Abstract
Aerobic denitrification is the key process in the elimination of nitrogen from aquaculture wastewater, especially for wastewater with high dissolved oxygen and low carbon/nitrogen (C/N) ratio. However, a low C/N ratio, especially in low-temperature environments, restricts the activity of aerobic denitrifiers and decreases the nitrogen elimination efficiency. In this study, an iron-based multi-solid carbon source composite that immobilized aerobic denitrifying bacteria ZS1 (IMCSCP) was synthesized to treat aerobic (DO > 5 mg/L), low temperature (<15 °C) and low C/N ratio (C/N = 4) aquaculture wastewater. The results showed that the sequencing batch biofilm reactor (SBBR) packed with IMCSCP exhibited the highest nitrogen removal performance, with removal rates of 95.63% and 85.44% for nitrate nitrogen and total nitrogen, respectively, which were 33.03% and 30.75% higher than those in the reactor filled with multi-solid carbon source composite (MCSC). Microbial community and network analysis showed that Pseudomonas furukawaii ZS1 successfully colonized the SBBR filled with IMCSCP, and Exiguobacterium, Cellulomonas and Pseudomonas were essential for the nitrogen elimination. Metagenomic analysis showed that an increase in gene abundance related to carbon metabolism, nitrogen metabolism, extracellular polymer substance synthesis and electron transfer in the IMCSCP, enabling denitrification in the SBBR to be achieved via multiple pathways. The results of this study provided new insights into the microbial removal mechanism of nitrogen in SBBR packed with IMCSCP at low temperatures.
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Affiliation(s)
- Zhuoyin Lu
- School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building and Urban Science, South China University of Technology, Guangzhou, 510641, China
| | - Xiangju Cheng
- School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building and Urban Science, South China University of Technology, Guangzhou, 510641, China.
| | - Jun Xie
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Zhifei Li
- School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building and Urban Science, South China University of Technology, Guangzhou, 510641, China; Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Xiangyang Li
- Guanghuiyuan Hydraulic Construction Engineering Co., Ltd., Shenzhen, 518020, China; Guangdong Engineering Technology Research Center of Smart and Ecological River, Guangzhou, 510640, China
| | - Xiaotian Jiang
- Guanghuiyuan Hydraulic Construction Engineering Co., Ltd., Shenzhen, 518020, China
| | - Dantong Zhu
- School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building and Urban Science, South China University of Technology, Guangzhou, 510641, China
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24
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Belachqer-El Attar S, Morillas-España A, Sánchez-Zurano A, Pessôa LC, Pinna-Hernández MG, de Jesus Assis D, López JLC, Acién G. Influence of culture media composition on the rheology of microalgae concentrates on a large scale. N Biotechnol 2023; 77:90-99. [PMID: 37532220 DOI: 10.1016/j.nbt.2023.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/16/2023] [Accepted: 07/30/2023] [Indexed: 08/04/2023]
Abstract
The role of microalgae in the production of bioproducts and biofuels, along with their ability to provide a sustainable pathway for wastewater treatment, makes them promising alternatives to conventional processes. Nevertheless, large-scale downstream processing requires an understanding of biomass rheology that needs to be addressed further. This study aimed to characterize microalgal concentrates rheologically in different culture media. The presence of bacteria was quantified by photorespirometry and plate counting techniques. The culture medium was found to significantly influence viscosity, with primary wastewater exhibiting the highest viscosity and seawater plus pig slurry the lowest. The concentration of heterotrophic bacteria was directly related to the viscosity. Extracellular polysaccharides (EPS) in supernatant exhibited an inverse viscosity trend compared to biomass concentrates, with pig slurry cultures having higher concentrations. These findings emphasize the profound influence of culture medium and EPS on the rheology of microalgal biomass, underscoring the need for continued research aimed at facilitating and optimizing large-scale downstream processes within the framework of a circular economy and the attainment of the Sustainable Development Goals (6,8, and 12).
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Affiliation(s)
- Solaima Belachqer-El Attar
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain.
| | - Ainoa Morillas-España
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Ana Sánchez-Zurano
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Luiggi Cavalcanti Pessôa
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil; Senai Cimatec University Center, Environment Department, Salvador, Brazil
| | - María Guadalupe Pinna-Hernández
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Denilson de Jesus Assis
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil; School of Exact and Technological Sciences, University Salvador, Salvador, Bahia, Brazil
| | - José Luis Casas López
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Gabriel Acién
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
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25
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Das P, Halder G, Bal M. A critical review on remediation of microplastics using microalgae from aqueous system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 898:166425. [PMID: 37598972 DOI: 10.1016/j.scitotenv.2023.166425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/30/2023] [Accepted: 08/17/2023] [Indexed: 08/22/2023]
Abstract
Microplastics (MPs) are deemed to be a global concern due to their harmful negative effects on the aquatic environment and human beings. MPs have a significant impact on both fresh and marine water ecosystems. In many countries, there is concern about the deleterious consequences of MPs on human health due to the presence of MPs in aquatic life for higher intake of marine food (fish and shellfish). Exposure to MPs causes fish to suffer from growth retardation, neurotoxicity, and behavioural abnormalities and it affects human as well. It causes oxidative stress, neurotoxicity, cytotoxicity, and immune system disruption after being ingested to these contaminated fish in human body. Due to these reasons, it has become imperative to find ways to resolve this problem. This review paper represents a pioneering endeavor by consolidating comprehensive information on microplastic-polluted Indian riverine ecosystems and effective MPs removal methods into a single, cohesive document. It meticulously evaluates the principles, removal efficiency, benefits, and drawbacks of various techniques, aiming to identify the most optimal solution. Furthermore, this paper provides a comprehensive exploration of the interesting interactions between MPs and microalgae, delving into the intricate processes of hetero-aggregation. Additionally, it shines a spotlight on the latest advancements in understanding the efficacy of microalgae in removing MPs, showcasing recent breakthroughs in this field of research. Moreover, the work goes beyond conventional assessments by elucidating the characteristics of MPs and exploring diverse influencing parameters that impact MPs removal by microalgae and also addresses the potential future aspects. This thorough investigation uncovers important factors that could significantly contribute to the development of more efficient and sustainable remediation strategies.
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Affiliation(s)
- Payal Das
- Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur, West Bengal 713209, India
| | - Gopinath Halder
- Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur, West Bengal 713209, India
| | - Manisha Bal
- Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur, West Bengal 713209, India.
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26
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Saad MH, Sidkey NM, El-Fakharany EM. Identification and statistical optimization of a novel alginate polymer extracted from newly isolated Synechocystis algini MNE ON864447 with antibacterial activity. Microb Cell Fact 2023; 22:229. [PMID: 37932753 PMCID: PMC10629183 DOI: 10.1186/s12934-023-02240-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 10/28/2023] [Indexed: 11/08/2023] Open
Abstract
Cyanobacteria are a potential source of promising secondary metabolites with different biological activities, including antibacterial, antiviral, antifungal, antiprotozoal, and anticancer activities. To combat the emergence of antibiotic resistance, there is an urgent requirement for new drugs, and cyanobacteria metabolites can constitute alternative new antibacterial medication. The chemical complexity of their exopolysaccharides indicates that they have the potential to be bioactive molecules with many biological activities. The present study aimed to produce and optimise a novel alginate polymer from a newly isolated cyanobacterium, S. algini MNE ON864447, in addition to its promising antibacterial activity. We successfully isolated a new cyanobacterium strain, S. algini MNE ON864447 from the Nile River, which produces alginate as an extracellular polymeric substance. The isolated cyanobacterial alginate was identified using a set of tests, including FTIR, TLC, HPLC, GC-MS, and 1H NMR. Plackett-Burman statistical design showed that working volume (X1), the incubation period (X2), and inoculum size (X3) are the most significant variables affecting the production of alginate. The highest alginate production (3.57 g/L) was obtained using 4% inoculum size in 400 mL medium/L conical flask after 20 days of the incubation period. The extracted alginate showed potent antibacterial activity against both Gram-negative and Gram-positive bacteria and Streptococcus mutants (NCTC10449) are the most sensitive tested pathogen for purified cyanobacterial alginate with inhibition zone diameters of 34 ± 0.1 mm at 10 mg/mL of purified alginate while Vibro cholera (NCTC 8021) the lowest sensitive one and showed inhibition zone diameters of 22.5 ± 0.05 mm at the same cyanobacterial alginate concentration. This antibacterial activity is a critical step in the development of antibacterial drugs and presents a new challenge to fight against multi-resistant bacteria.
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Affiliation(s)
- Mabroka H Saad
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research andTechnological Applications (SRTA-City), New Borg AL Arab, Alexandria, Egypt
- Botany & Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch), Cairo, Egypt
| | - Nagwa M Sidkey
- Botany & Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch), Cairo, Egypt
| | - Esmail M El-Fakharany
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research andTechnological Applications (SRTA-City), New Borg AL Arab, Alexandria, Egypt.
- Pharmaceutical and Fermentation Industries Development Centre (PFIDC), City of Scientific Research and Technological Applications (SRTA-City), New Borg Al-Arab, Alexandria, Egypt.
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27
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Najar-Almanzor CE, Velasco-Iglesias KD, Nunez-Ramos R, Uribe-Velázquez T, Solis-Bañuelos M, Fuentes-Carrasco OJ, Chairez I, García-Cayuela T, Carrillo-Nieves D. Microalgae-assisted green bioremediation of food-processing wastewater: A sustainable approach toward a circular economy concept. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118774. [PMID: 37619389 DOI: 10.1016/j.jenvman.2023.118774] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 07/23/2023] [Accepted: 08/09/2023] [Indexed: 08/26/2023]
Abstract
Wastewater disposal is a major environmental issue that pollutes water, causing eutrophication, habitat destruction, and economic impact. In Mexico, food-processing effluents pose a huge environmental threat due to their excessive nutrient content and their large volume discharged every year. Some of the most harmful residues are tequila vinasses, nejayote, and cheese whey. Each liter of tequila generates 13-15 L of vinasses, each kilogram of cheese produces approximately 9 kg of cheese whey, and each kilogram of nixtamalized maize results in the production of 2.5-3.3 L of nejayote. A promising strategy to reduce the contamination derived from wastewater is through microalgae-based wastewater treatment. Microalgae have a high adaptability to hostile environments and they can feed on the nutrients in the effluents to grow. Moreover, to increase the viability, profitability, and value of wastewater treatments, a microalgae biorefinery could be proposed. This review will focus on the circular bioeconomy scheme focused on the simultaneous food-processing wastewater treatment and its use to grow microalgae biomass to produce added-value compounds. This strategy allows for the revalorization of wastewater, decreases contamination of water sources, and produces valuable compounds that promote human health such as phycobiliproteins, carotenoids, omega-3 fatty acids, exopolysaccharides, mycosporine-like amino acids, and as a source of clean energy: biodiesel, biogas, and bioethanol.
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Affiliation(s)
- Cesar E Najar-Almanzor
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jal., Mexico
| | - Karla D Velasco-Iglesias
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jal., Mexico
| | - Regina Nunez-Ramos
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jal., Mexico
| | - Tlalli Uribe-Velázquez
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jal., Mexico
| | - Minerva Solis-Bañuelos
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jal., Mexico
| | - Oscar J Fuentes-Carrasco
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jal., Mexico
| | - Isaac Chairez
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jal., Mexico; Tecnologico de Monterrey, Institute of Advanced Materials for the Sustainable Manufacturing, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jal., Mexico
| | - Tomás García-Cayuela
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jal., Mexico
| | - Danay Carrillo-Nieves
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jal., Mexico.
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D'ors A, Sánchez-Fortún A, Cortés-Téllez AA, Fajardo C, Mengs G, Nande M, Martín C, Costa G, Martín M, Bartolomé MC, Sánchez-Fortún S. Adverse effects of iron-based nanoparticles on freshwater phytoplankton Scenedesmus armatus and Microcystis aeruginosa strains. CHEMOSPHERE 2023; 339:139710. [PMID: 37532199 DOI: 10.1016/j.chemosphere.2023.139710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/29/2023] [Accepted: 07/31/2023] [Indexed: 08/04/2023]
Abstract
Zero-valent nano-iron particles (nZVI) are increasingly present in freshwater aquatic environments due to their numerous applications in environmental remediation. However, despite the broad benefits associated with the use and development of nZVI nanoparticles, the potential risks of introducing them into the aquatic environment need to be considered. Special attention should be focused on primary producer organisms, the basal trophic level, whose impact affects the rest of the food web. Although there are numerous acute studies on the acute effects of these nanoparticles on photosynthetic primary producers, few studies focus on long-term exposures. The present study aimed at assessing the effects of nZVI on growth rate, photosynthesis activity, and reactive oxygen activity (ROS) on the freshwater green algae Scenedesmus armatus and the cyanobacteria Microcystis aeruginosa. Moreover, microcystin production was also evaluated. These parameters were assessed on both organisms singly exposed to 72 h-effective nZVI concentration for 10% maximal response for 28 days. The results showed that the cell growth rate of S. armatus was initially significantly altered and progressively reached control-like values at 28 days post-exposure, while M. aeruginosa did not show any significant difference concerning control values at any time. In both strains dark respiration (R) increased, unlike net photosynthesis (Pn), while gross photosynthesis (Pg) only slightly increased at 7 days of exposure and then became equal to control values at 28 days of exposure. The nZVI nanoparticles generated ROS progressively during the 28 days of exposure in both strains, although their formation was significantly higher on green algae than on cyanobacteria. These data can provide additional information to further investigate the potential risks of nZVI and ultimately help decision-makers make better informed decisions regarding the use of nZVI for environmental remediation.
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Affiliation(s)
- A D'ors
- Dpt. of Pharmacology and Toxicology, Universidad Complutense de Madrid (UCM), w/n Puerta de Hierro Ave, 28040, Madrid, Spain
| | - A Sánchez-Fortún
- Dpt. of Pharmacology and Toxicology, Universidad Complutense de Madrid (UCM), w/n Puerta de Hierro Ave, 28040, Madrid, Spain
| | - A A Cortés-Téllez
- Environmental Toxicology Laboratory, Faculty of Chemistry-Pharmacobiology, Universidad Michoacana de San Nicolás de Hidalgo, 403 Santiago Tapia St, 58000, Morelia, (Michoacán), Mexico
| | - C Fajardo
- Dpt. of Biomedicine and Biotechnology, Universidad de Alcalá (UAH), w/n San Diego Sq, 28801, Alcalá de Henares, Spain
| | - G Mengs
- Technical and R&D Department, Ecotoxilab SL, 10 Juan XXIII, 28550, Tielmes, Spain
| | - M Nande
- Dpt. of Biochemistry and Molecular Biology, Complutense University, w/n Puerta de Hierro Ave, 28040, Madrid, Spain
| | - C Martín
- Dpt. of Biotechnology-Plant Biology, Universidad Politécnica de Madrid (UPM), 3 Complutense Ave, 28040, Madrid, Spain
| | - G Costa
- Department of Animal Physiology, Faculty of Veterinary Sciences, Complutense University, w/n Puerta de Hierro Ave, 28040, Madrid, Spain
| | - M Martín
- Dpt. of Biochemistry and Molecular Biology, Complutense University, w/n Puerta de Hierro Ave, 28040, Madrid, Spain
| | - M C Bartolomé
- Environmental Toxicology Laboratory, Faculty of Chemistry-Pharmacobiology, Universidad Michoacana de San Nicolás de Hidalgo, 403 Santiago Tapia St, 58000, Morelia, (Michoacán), Mexico.
| | - S Sánchez-Fortún
- Dpt. of Pharmacology and Toxicology, Universidad Complutense de Madrid (UCM), w/n Puerta de Hierro Ave, 28040, Madrid, Spain.
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29
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Shitanaka T, Higa L, Bryson AE, Bertucci C, Vande Pol N, Lucker B, Khanal SK, Bonito G, Du ZY. Flocculation of oleaginous green algae with Mortierella alpina fungi. BIORESOURCE TECHNOLOGY 2023; 385:129391. [PMID: 37364649 DOI: 10.1016/j.biortech.2023.129391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/22/2023] [Accepted: 06/23/2023] [Indexed: 06/28/2023]
Abstract
Microalgae are promising sources of valuable bioproducts such as biofuels, food, and nutraceuticals. However, harvesting microalgae is challenging due to their small size and low biomass concentrations. To address this challenge, bio-flocculation of starchless mutants of Chlamydomonas reinhardtii (sta6/sta7) was investigated with Mortierella alpina, an oleaginous fungus with high concentrations of arachidonic acid (ARA). Triacylglycerides (TAG) reached 85 % of total lipids in sta6 and sta7 through a nitrogen regime. Scanning electron microscopy determined cell-wall attachment and extra polymeric substances (EPS) to be responsible for flocculation. An algal-fungal biomass ratio around 1:1 (three membranes) was optimal for bio-flocculation (80-85 % flocculation efficiency in 24 h). Nitrogen-deprived sta6/sta7 were flocculated with strains of M. alpina (NVP17b, NVP47, and NVP153) with aggregates exhibiting fatty acid profiles similar to C. reinhardtii, with ARA (3-10 % of total fatty acids). This study showcases M. alpina as a strong bio-flocculation candidate for microalgae and advances a mechanistic understanding of algal-fungal interaction.
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Affiliation(s)
- Ty Shitanaka
- Department of Molecular Biosciences & Bioengineering, University of Hawai'i at Mānoa, Honolulu, HI 96822, United States
| | - Lauren Higa
- Department of Molecular Biosciences & Bioengineering, University of Hawai'i at Mānoa, Honolulu, HI 96822, United States
| | - Abigail E Bryson
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, United States
| | - Conor Bertucci
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, United States
| | - Natalie Vande Pol
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, United States
| | - Ben Lucker
- Trait Biosciences, Los Alamos, NM 87544, United States
| | - Samir Kumar Khanal
- Department of Molecular Biosciences & Bioengineering, University of Hawai'i at Mānoa, Honolulu, HI 96822, United States; Department of Civil and Environmental Engineering, University of Hawai'i at Mānoa, Honolulu, HI 96822, United States
| | - Gregory Bonito
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, United States.
| | - Zhi-Yan Du
- Department of Molecular Biosciences & Bioengineering, University of Hawai'i at Mānoa, Honolulu, HI 96822, United States.
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30
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Ugya AY, Chen H, Wang Q. Microalgae biofilm system as an efficient tool for wastewater remediation and potential bioresources for pharmaceutical product production: an overview. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 26:131-142. [PMID: 37382505 DOI: 10.1080/15226514.2023.2229920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
The role of microalgae in wastewater remediation and metabolite production has been well documented, but the limitations of microalgae harvesting and low biomass production call for a more sustainable method of microalgae utilization. The current review gives an insight on how microalgae biofilms can be utilized as a more efficient system for wastewater remediation and as potential source of metabolite for pharmaceutical product production. The review affirms that the extracellular polymeric substance (EPS) is the vital component of the microalgae biofilm because it influences the spatial organization of the organisms forming microalgae biofilm. The EPS is also responsible for the ease interaction between organisms forming microalgae biofilm. This review restate the crucial role play by EPS in the removal of heavy metals from water to be due to the presence of binding sites on its surface. This review also attribute the ability of microalgae biofilm to bio-transform organic pollutant to be dependent on enzymatic activities and the production of reactive oxygen species (ROS). The review assert that during the treatment of wastewater, the wastewater pollutants induce oxidative stress on microalgae biofilms. The response of the microalgae biofilm toward counteracting the stress induced by ROS leads to production of metabolites. These metabolites are important tools that can be harness for the production of pharmaceutical products.
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Affiliation(s)
- Adamu Yunusa Ugya
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
- Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, China
- Department of Environmental Management, Kaduna State University, Kaduna State, Nigeria
| | - Hui Chen
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
- Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, China
| | - Qiang Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
- Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, China
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31
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Mora-Godínez S, Contreras-Torres FF, Pacheco A. Characterization of Silver Nanoparticle Systems from Microalgae Acclimated to Different CO 2 Atmospheres. ACS OMEGA 2023; 8:21969-21982. [PMID: 37360473 PMCID: PMC10286254 DOI: 10.1021/acsomega.3c01914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/23/2023] [Indexed: 06/28/2023]
Abstract
Green synthesis of metallic nanoparticles using microalgae exposed to high CO2 atmospheres has not been studied in detail; this is of relevance in biological CO2 mitigation systems where considerable biomass is produced. In this study, we further characterized the potential of an environmental isolate Desmodesmus abundans acclimated to low and high CO2 atmospheres [low carbon acclimation (LCA) and high carbon acclimation (HCA) strains, respectively] as a platform for silver nanoparticle (AgNP) synthesis. As previously characterized, cell pellets at pH 11 were selected from the biological components tested of the different microalgae, which included the culture collection strain Spirulina platensis. AgNP characterization showed superior performance of strain HCA components as preserving the supernatant resulted in synthesis in all pH conditions. Size distribution analysis evidenced strain HCA cell pellet platform (pH 11) as the most homogeneous AgNP population (14.9 ± 6.4 nm diameter, -32.7 ± 5.3 mV) followed by S. platensis (18.3 ± 7.5 nm, -33.9 ± 2.4 mV). In contrast, strain LCA presented a broader population where the size was above 100 nm (127.8 ± 14.8 nm, -26.7 ± 2.4 mV). Fourier-transform infrared and Raman spectroscopies showed that the reducing power of microalgae might be attributed to functional groups in the cell pellet from proteins, carbohydrates, and fatty acids and, in the supernatant, from amino acids, monosaccharides, disaccharides, and polysaccharides. Microalgae AgNPs exhibited similar antimicrobial properties in the agar diffusion test against Escherichia coli. However, they were not effective against Gram (+) Lactobacillus plantarum. It is suggested that a high CO2 atmosphere potentiates components in the D. abundans strain HCA for nanotechnology applications.
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Affiliation(s)
- Shirley Mora-Godínez
- Tecnologico
de Monterrey, Escuela de Ingenieria y Ciencias, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico
| | - Flavio F. Contreras-Torres
- Tecnologico
de Monterrey, The Institute for Obesity Research, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico
| | - Adriana Pacheco
- Tecnologico
de Monterrey, Escuela de Ingenieria y Ciencias, Ave. Eugenio Garza Sada 2501, Monterrey, N.L. 64849, Mexico
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32
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Lee HE, Lee JH, Park SM, Kim DG. Symbiotic relationship between filamentous algae ( Halomicronema sp.) and extracellular polymeric substance-producing algae ( Chlamydomonas sp.) through biomimetic simulation of natural algal mats. Front Microbiol 2023; 14:1176069. [PMID: 37293230 PMCID: PMC10244577 DOI: 10.3389/fmicb.2023.1176069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 05/03/2023] [Indexed: 06/10/2023] Open
Abstract
To lower the cost of biomass harvesting, the growth of natural biofilm is considered to be an optimal alternative to microalgae aggregation. This study investigated algal mats that naturally agglomerate into a lump and float on water surfaces. Halomicronema sp., a filamentous cyanobacterium with high cell aggregation and adhesion to substrates, and Chlamydomonas sp., which grows rapidly and produces high extracellular polymeric substances (EPS) in certain environments, are the main microalgae that make up selected mats through next-generation sequencing analysis. These two species play a major role in the formation of solid mats, and showed a symbiotic relationship as the medium and nutritional source, particularly owing to the large amount of EPS formed by the reaction between EPS and calcium ions through zeta potential and Fourier-transform infrared spectroscopy analysis. This led to the formation of an ecological biomimetic algal mat (BAM) that mimics the natural algal mat system, and this is a way to reduce costs in the biomass production process as there is no separate treatment process for harvesting.
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Affiliation(s)
- Ha Eun Lee
- LED Agri-bio Fusion Technology Research Center, Jeonbuk National University, Iksan-si, Jeollabuk-do, Republic of Korea
| | - Jun Ho Lee
- Department of Agricultural Chemistry, Jeonbuk National University, Jeonju-si, Jeollabuk-do, Republic of Korea
| | - Seung Moon Park
- Department of Bioenvironmental Chemistry, Jeonbuk National University, Jeonju-si, Jeollabuk-do, Republic of Korea
| | - Dae Geun Kim
- LED Agri-bio Fusion Technology Research Center, Jeonbuk National University, Iksan-si, Jeollabuk-do, Republic of Korea
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33
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Nagabalaji V, Maharaja P, Nishanthi R, Sathish G, Suthanthararajan R, Srinivasan SV. Effect of co-culturing bacteria and microalgae and influence of inoculum ratio during the biological treatment of tannery wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 341:118008. [PMID: 37146488 DOI: 10.1016/j.jenvman.2023.118008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 04/12/2023] [Accepted: 04/22/2023] [Indexed: 05/07/2023]
Abstract
This present investigation is carried out to study the effect of algal and bacterial inoculum concentrations on the removal of organic pollutants and nutrients from the tannery effluent by the combined symbiotic treatment process. The bacterial and microalgal consortia was developed in laboratory setup and mixed together to perform this study. The Influence of algae and bacteria inoculum concentrations on the removal of pollutants such as Chemical Oxygen Demand (COD) and Total Kjeldahl Nitrogen (TKN) were studied using statistical optimization through Response surface methodology. For the design of experimental set up and optimization, full factorial Central composite design was used. The profiles of pH, Dissolved Oxygen (DO) and nitrate were also monitored and studied. The inoculum concentrations of microalgae and bacteria showed significant effect on Co-culturing on COD, TKN and nitrate removals as major response. The linear effect of bacterial inoculum has positive dominant influence on COD and TKN removal efficiencies. Nitrate utilization by microalgae increases with the increase in microalgal inoculum concentration. The maximum removal efficiencies of COD and TKN with 89.9% and 80.9% were obtained at optimum bacterial and algal inoculum concentrations of 6.7 g/L and 8.0 g/L respectively. These outcomes of this study are immensely favorable for maximizing the COD and nitrogen (nutrients) removal capabilities of microalgae-bacterial consortia in tannery effluent.
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Affiliation(s)
- Velmurugan Nagabalaji
- Environmental Engineering Department, CSIR-Central Leather Research Institute, Chennai, 600 020, India; Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, 201002, India.
| | - Pounsamy Maharaja
- Environmental Engineering Department, CSIR-Central Leather Research Institute, Chennai, 600 020, India
| | - Rajendiran Nishanthi
- Environmental Engineering Department, CSIR-Central Leather Research Institute, Chennai, 600 020, India
| | - Ganesan Sathish
- Environmental Engineering Department, CSIR-Central Leather Research Institute, Chennai, 600 020, India
| | | | - Shanmugham Venkatachalam Srinivasan
- Environmental Engineering Department, CSIR-Central Leather Research Institute, Chennai, 600 020, India; Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, 201002, India.
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34
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Tavares J, Silva TP, Paixão SM, Alves L. Development of a bench-scale photobioreactor with a novel recirculation system for continuous cultivation of microalgae. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 332:117418. [PMID: 36753845 DOI: 10.1016/j.jenvman.2023.117418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 01/26/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
Microalgae cultivation can be used to increase the sustainability of carbon emitting processes, converting the CO2 from exhaust gases into fuels, food and chemicals. Many of the carbon emitting industries operate in a continuous manner, for periods that can span days or months, resulting in a continuous stream of gas emissions. Biogenic CO2 from industrial microbiological processes is one example, since in many cases it becomes unsustainable to stop these processes on a daily or weekly basis. To correctly sequester these emissions, microalgae systems must be operated under continuous constant conditions, requiring photobioreactors (PBRs) that can act as chemostats for long periods of time. However, in order to optimize culture parameters or study metabolic responses, bench-scale setups are necessary. Currently there is a lack of studies and design alternatives using chemostat, since most works focus on batch assays or semi-continuous cultures. Therefore, this work focused on the development of a continuous bench-scale PBR, which combines a retention vessel, a photocollector and a degasser, with an innovative recirculation system, that allows it to operate as an autotrophic chemostat, to study carbon sequestration from a biogenic CO2-rich constant air stream. To assess its applicability, the PBR was used to cultivate the green microalga Haematococcus pluvialis using as sole carbon source the CO2 produced by a coupled heterotrophic bacterial chemostat. An air stream containing ≈0.35 vol% of CO2, was fed to the system, and it was evaluated in terms of stability, carbon fixation and biomass productivity, for dilution rates ranging from 0.1 to 0.5 d-1. The PBR was able to operate under chemostat conditions for more than 100 days, producing a stable culture that generated proportional responses to the stimuli it was subjected to, attaining a maximum biomass productivity of 183 mg/L/d with a carbon fixation efficiency of ≈39% at 0.3 d-1. These results reinforce the effectiveness of the developed PBR system, making it suitable for laboratory-scale studies of continuous photoautotrophic microalgae cultivation.
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Affiliation(s)
- João Tavares
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias, Estrada do Paço do Lumiar, 22, 1649-038, Lisboa, Portugal
| | - Tiago P Silva
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias, Estrada do Paço do Lumiar, 22, 1649-038, Lisboa, Portugal
| | - Susana M Paixão
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias, Estrada do Paço do Lumiar, 22, 1649-038, Lisboa, Portugal.
| | - Luís Alves
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias, Estrada do Paço do Lumiar, 22, 1649-038, Lisboa, Portugal.
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35
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Zheng L, Ren M, Liu T, Ding A, Xie E. Base type determines the effects of nucleoside monophosphates on microalgae-bacteria symbiotic systems. CHEMOSPHERE 2023; 317:137943. [PMID: 36702408 DOI: 10.1016/j.chemosphere.2023.137943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 12/09/2022] [Accepted: 01/22/2023] [Indexed: 06/18/2023]
Abstract
Microalgae are promising sources of clean energy. Bioflocculation by cocultured bacteria is an effective way to harvest microalgae. As a key foundation for microorganisms, phosphorus is theoretically effective in shaping microalgae production and flocculation. In this study, the impacts of 23 nucleoside monophosphates on Auxenochlorella pyrenoidosa growth, lipid synthesis, and self-settlement and on the symbiotic bacterial system were investigated. Adenosine monophosphate was the most effective in enhancing microalgae development (2.14-3.16 × 108 cells/mL) and lipid production (average 10.48%) and resulted in a low settling velocity. Samples were divided into two groups, purine and pyrimidine feeding, according to a random forest analysis (OOB = 0%, p < 0.001). Purine feeding resulted in the highest soluble extracellular protein and polysaccharide secretion (p < 0.01). KEGG ortholog count prediction of functional genes related to biofilm formation was conducted using PICRUSt2, and significant upregulation (FC ≥ 1.77, p < 0.05) of the extracellular polymeric substance formation functional group was observed in the adenosine and guanosine treatments. The symbiotic bacterial community structure differed substantially between purine- and pyrimidine-feeding systems. In summary, these results indicated that the effect of nucleoside monophosphates on the microalgae-bacteria system is determined by the base type (purine or pyrimidine) rather than the molecular structure (cyclic or noncyclic).
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Affiliation(s)
- Lei Zheng
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China
| | - Mengli Ren
- Middle Reach Hydrology and Water Resource Bureau of YRCC, Shanxi, 030600, PR China
| | - Tingting Liu
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China
| | - Aizhong Ding
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China
| | - En Xie
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, PR China; Engineering Research Center of Agricultural Water-Saving and Water Resources, Ministry of Education, China Agricultural University, Beijing, 100083, PR China.
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36
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Algal-algal bioflocculation enhances the recovery efficiency of Picochlorum sp. QUCCCM130 with low auto-settling capacity. ALGAL RES 2023. [DOI: 10.1016/j.algal.2023.103038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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37
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Guo L, Wu Q, Lai YS, Eustance E, Rittmann BE. Revealing the role of phosphorus supply on the phosphorus distribution and lipid production in Scenedesmus obliquus UTEX 393 during nitrogen starvation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159811. [PMID: 36349625 DOI: 10.1016/j.scitotenv.2022.159811] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/16/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
Microalgal-based processes offer promise for addressing two sustainability challenges: recovering phosphorus (P) from wastewater and producing biofuel feedstock. This study investigated the role of phosphorus supply on microalgal growth, lipid yield, and P distribution for Scenedesmus during nitrogen starvation. Extracellular polymeric substances and intracellular polymeric substances were the most important pools for inorganic phosphorus (IP) and organic phosphorus (OP), respectively. The main P pool for microalgae with low phosphorus supply was EPS, which accounted for 57 % of the total biomass phosphorus; while under high P concentrations, 79 % of the phosphorus was stored in IPS. A high concentration of orthophosphate stimulated rapid P uptake as IP and promoted the transformation of IP to OP associating with biomass synthesis. The highest P content of microalgal biomass was 6.5 % of dry weight when the phosphorus concentration in medium was 113 mg/L, and the OP content was 4.9 % of dry weight. High phosphate-P enhanced the biomass's lipid content by 60 %, and the distribution of fatty acid methyl esters was not altered by P concentrations. Collectively, high phosphate-P availability could promote microalgal biomass synthesis, lipid production and P accumulation.
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Affiliation(s)
- Liang Guo
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Laboratory of Marine Environmental and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
| | - Qirui Wu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - YenJung Sean Lai
- Swette Center for Environmental Biotechnology, Biodesign Institute at Arizona State University, USA
| | - Everett Eustance
- Swette Center for Environmental Biotechnology, Biodesign Institute at Arizona State University, USA
| | - Bruce E Rittmann
- Swette Center for Environmental Biotechnology, Biodesign Institute at Arizona State University, USA
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Palanivel TM, Pracejus B, Novo LAB. Bioremediation of copper using indigenous fungi Aspergillus species isolated from an abandoned copper mine soil. CHEMOSPHERE 2023; 314:137688. [PMID: 36584825 DOI: 10.1016/j.chemosphere.2022.137688] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 12/24/2022] [Accepted: 12/27/2022] [Indexed: 06/17/2023]
Abstract
Bioremediation of mining soils using metal tolerant fungi is widely considered as a promising cost-effective and ecofriendly approach. This study assessed the copper removal efficiency and bioaccumulation ability of the indigenous species Aspergillus hiratsukae LF1 and Aspergillus terreus LF2 isolated from the soils of an abandoned copper mine in Oman. Nutrient medium containing five different Cu (II) levels (0 - control, 100, 200, 300 and 500 mg/L) was employed for assessing both parameters. The removal efficiency from nutrient medium (100-500 mg Cu per L) ranged from 57% to 21% for A. hiratsukae LF1, and from 69% to 24% for A. terreus LF2. A. hiratsukae LF1 and A. terreus LF2 accumulated a maximum of 4.63 and 5.95 mg Cu/g,espectively, at 500 mg/L of Cu (II) concentration. The compositional analysis of extracellular polymeric substances excreted by both species revealed a hormetic response by A. hiratsukae LF1 at 100 mg/L; whereas increasing media Cu levels induced carbohydrates production in A. terreus LF2. These results hint at the involvement of carbohydrates in the Cu-tolerance mechanism of the latter. Copper accumulation in both species was further demonstrated through scanning electron microscopy and energy dispersive spectrometry. In line with the pertaining literature, our results are somewhat inconclusive concerning whether proteins or carbohydrates play a more pivotal role in copper complexation in both species; yet, FTIR analysis showed the participation of different functional groups in Cu sorption. Overall, although additional research is required to advance the knowledge about both Aspergillus species, our findings suggest that A. terreus LF2 presents greater promise for copper bioremediation due to enhanced tolerance and accumulation capacity.
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Affiliation(s)
| | - Bernhard Pracejus
- Department of Earth Science, College of Science,Sultan Qaboos University, P.O. Box 36, 123 Al-Khoud, Muscat, Oman
| | - Luís A B Novo
- Scotland's Rural College (SRUC), Peter Wilson Building, King's Buildings, Edinburgh, EH9 3JG, UK.
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Antonopoulou M, Vlastos D, Dormousoglou M, Bouras S, Varela-Athanasatou M, Bekakou IE. Genotoxic and Toxic Effects of The Flame Retardant Tris(Chloropropyl) Phosphate (TCPP) in Human Lymphocytes, Microalgae and Bacteria. TOXICS 2022; 10:736. [PMID: 36548569 PMCID: PMC9782401 DOI: 10.3390/toxics10120736] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/17/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Tris(chloropropyl) phosphate (TCPP) is a characteristic and widely used organophosphorus flame retardant. TCPP is comprised of four isomers and the most abundant is tris(1-chloro-2-propyl) phosphate. TCPP can be released into the environment, with potential impacts on living organisms and humans due to its extensive industrial use. Aiming to assess the potential risks of TCPP on human health and the environment, its toxic and genotoxic effects-using organisms from different trophic levels, i.e., bacteria, green microalgae, and human cells-were investigated. TCPP exposure at nominal concentrations of 10, 20, 30 and 40 μg mL-1 was studied to identify the potential risk of inducing genotoxic effects in cultured human lymphocytes. Treatment with 30 and 40 μg mL-1 of TCPP induced marginally significant micronuclei (MN) frequencies as well as cytotoxic effects. Freshwater microalgae species treated with TCPP (0.5, 1, 10, 20 and 50 μg L-1) showed different growth rates over time. All the tested microalgae species were adversely affected after exposure to TCPP during the first 24 h. However, differences among the microalgae species' sensitivities were observed. In the case of the freshwater species, the most sensitive was found to be Chlorococcum sp. The marine algal species Dunaliella tertiolecta and Tisochrysis lutea were significantly affected after exposure to TCPP. The effects of TCPP on Aliivibrio fischeri that were observed can classify this flame retardant as a "harmful" compound. Our results suggest a potential risk to aquatic organisms and humans from the wide utilization of TCPP and its consequent release into the environment. These results highlight that further research should be conducted to investigate the effects of TCPP individually and in combination with other organophosphorus flame retardants in various organisms. In addition, the concern induced by TCPP points out that measures to control the introduction of TCPP into the environment should be taken.
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Affiliation(s)
- Maria Antonopoulou
- Department of Sustainable Agriculture (Former Department of Environmental Engineering), University of Patras, 30100 Agrinio, Greece
| | - Dimitris Vlastos
- Department of Biology, Section of Genetics Cell Biology and Development, University of Patras, 26500 Patras, Greece
| | - Margarita Dormousoglou
- Department of Sustainable Agriculture (Former Department of Environmental Engineering), University of Patras, 30100 Agrinio, Greece
| | - Spyridon Bouras
- Department of Sustainable Agriculture (Former Department of Environmental Engineering), University of Patras, 30100 Agrinio, Greece
| | - Maria Varela-Athanasatou
- Department of Sustainable Agriculture (Former Department of Environmental Engineering), University of Patras, 30100 Agrinio, Greece
| | - Irene-Eleni Bekakou
- Department of Sustainable Agriculture (Former Department of Environmental Engineering), University of Patras, 30100 Agrinio, Greece
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Li C, Wang JH, Yu C, Zhang JT, Chi ZY, Zhang Q. Growth-promoting effects of phytohormones on capillary-driven attached Chlorella sp. biofilm. BIORESOURCE TECHNOLOGY 2022; 364:128117. [PMID: 36244605 DOI: 10.1016/j.biortech.2022.128117] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/07/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
Using low strength wastewater for microalgae cultivation is challenged by slow growth and biomass harvesting issue in suspended systems, and growth-promoting effects of phytohormones at currently recommended dosages could neither obtain high enough biomass concentrations nor economic feasibility. This study aims to solve the issues of slow growth, biomass harvest, and phytohormone costs altogether by supplementing low dosage phytohormones in an improved capillary-driven attached cultivation device. The device displayed nutrients-condensing properties, and dosages of indole acetic acid (IAA), 6-benzylaminopurine (6-BA), and salicylic acid (SA) for highest microalgal growth were respectively 10-6 M, 10-6 M, and 10-7 M, being at least one order of magnitude lower than in suspended cultures. SA was most effective in growth-promoting (up to 7.0 g/m2 biomass density) and nutrients uptake (up to 98.6 % from the bulk environment), while IAA was most effective in antioxidative defenses. These results provided new insights in cost-effective and harvesting-convenient microalgae production.
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Affiliation(s)
- Chi Li
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Jing-Han Wang
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China; Key Laboratory of Environment Controlled Aquaculture, Dalian Ocean University, Dalian 116023, PR China.
| | - Chong Yu
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Jing-Tian Zhang
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Zhan-You Chi
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Qian Zhang
- Key Laboratory of Environment Controlled Aquaculture, Dalian Ocean University, Dalian 116023, PR China
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Tong CY, Lew JK, Derek CJC. Algal extracellular organic matter pre-treatment enhances microalgal biofilm adhesion onto microporous substrate. CHEMOSPHERE 2022; 307:135740. [PMID: 35850213 DOI: 10.1016/j.chemosphere.2022.135740] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 06/25/2022] [Accepted: 07/12/2022] [Indexed: 06/15/2023]
Abstract
Adhesive biocoating has microstructure composed of biomolecules to entrap viable cells in a stabilized matrix over exposed surfaces. Although marine benthic diatoms are a common group of algae excreting substantial amount of extracellular polymeric substances (EPS), studies regarding the utilization of these EPS are scarce. Using the soluble EPS derived from Navicula incerta and pre-deposition of it as a thin conditioning layer on microporous polyvinylidene fluoride (PVDF) membranes, the pre-coated surface was used to investigate the cell binding affinity of three marine microalgae, namely Amphora coffeaeformis, Cylindrotheca fusiformis and Navicula incerta. Microalgae actively engaged themselves on the pre-coated membranes which was 10 times greater than the initial cell adhesion degree. Soluble EPS is mainly comprised of polysaccharide while bounded EPS is mainly comprised of protein. On EPS pre-coated membranes, N. incerta released the least amount of bounded polysaccharides (<100 mg m-2) and vice versa for the other two because EPS production is usually maximized to assist cell adhesion onto unfavorable substrates. In stark contrast, when the adaptation period (first 6 h) ended, cells began to secrete more bounded protein for cell growth, and an increasing trend of protein content found in N. incerta has verified its optimal adaptation onto the biocoating itself. On pristine PVDF membranes, the adhesion degree was ranked in ascending order: C. fusiformis, N. incerta and A. coffeaeformis. Interestingly, after the pre-coating process, the order was reported as: A. coffeaeformis, N. incerta and C. fusiformis, but it should be noted that C. fusiformis demonstrated fluctuating cell colonization degree and bounded EPS production over time. In other words, the biofilm's susceptibility was confirmed since the cells latched loosely on the membranes rather than in a biofilm matrix. Biocoating enables uniform cell distribution and firmer biofilm growth, opening the door to vast future applications in environmental bioremediation and sensing.
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Affiliation(s)
- C Y Tong
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
| | - J K Lew
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
| | - C J C Derek
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.
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Ho QN, Fettweis M, Hur J, Desmit X, Kim JI, Jung DW, Lee SD, Lee S, Choi YY, Lee BJ. Flocculation kinetics and mechanisms of microalgae- and clay-containing suspensions in different microalgal growth phases. WATER RESEARCH 2022; 226:119300. [PMID: 36323221 DOI: 10.1016/j.watres.2022.119300] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 10/15/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Interplays between microalgae and clay minerals enhance biologically mediated flocculation, thereby affecting the sedimentation and transportation of suspended particulate matter (SPM) in water and benthic environments. This interaction forms larger flocs with a higher settling velocity and enhances SPM sinking. The aim of this study was to investigate the flocculation kinetics of microalgae and clay in suspension and to elucidate the mechanisms associated with such interactions. Standard jar test experiments were conducted using various mixtures of kaolinite and microalgal samples from batch cultures (Chlorella vulgaris) to estimate biologically mediated flocculation kinetics. The organic matter (OM) composition secreted by the microalgae was characterized using a liquid chromatography - organic carbon detection system, and quantitative analysis of transparent exopolymer particles was conducted separately. A two-class flocculation kinetic model, based on the interaction between flocculi and flocs, was also adopted to quantitatively analyze the experimental data from flocculation. Results from the flocculation kinetic tests and OM analyses, in association with other data analyses (i.e., floc size distribution and flocculation kinetic model), showed that flocculation increased with OM concentration during the growth phase (10-20 d). However, on day 23 during the early stationary phase, flocculation kinetics started decreasing and substantially declined on day 30, even though the amount of OM (mainly biopolymers) continued to increase. Our results indicate that an adequate quantity of biopolymers produced by the microalgal cells in the growth phase enhanced floc-to-floc attachment and hence flocculation kinetics. In contrast, an excessive quantity of biopolymers and humic substances in the stationary phase enhanced the formation of polymeric backbone structures and flocculation via scavenging particles but simultaneously increased steric stabilization with the production of a large number of fragmented particles.
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Affiliation(s)
- Que Nguyen Ho
- Energy Environment Institute, Kyungpook National University, 2559 Gyeongsang-daero, Sangju, Gyeongbuk 37224, South Korea; Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam
| | - Michael Fettweis
- Operational Directorate Natural Environment, Royal Belgian Institute of Natural Sciences, Rue Vautier 29, Bruxelles B-1000, Belgium
| | - Jin Hur
- Department of Environment & Energy, Sejong University, Seoul 05006, South Korea
| | - Xavier Desmit
- Operational Directorate Natural Environment, Royal Belgian Institute of Natural Sciences, Rue Vautier 29, Bruxelles B-1000, Belgium
| | - Jae In Kim
- Energy Environment Institute, Kyungpook National University, 2559 Gyeongsang-daero, Sangju, Gyeongbuk 37224, South Korea
| | - Dae Won Jung
- Nakdonggang National Institute of Biological Resources (NNIBR), Sangju, Gyeongsangbuk-do 37242, South Korea
| | - Sang Deuk Lee
- Nakdonggang National Institute of Biological Resources (NNIBR), Sangju, Gyeongsangbuk-do 37242, South Korea
| | - Sungyun Lee
- Energy Environment Institute, Kyungpook National University, 2559 Gyeongsang-daero, Sangju, Gyeongbuk 37224, South Korea; Department of Advanced Science and Technology Convergence, Kyungpook National University, 2559 Gyeongsang-daero, Sangju, Gyeongbuk 37224, South Korea
| | - Yun Young Choi
- Energy Environment Institute, Kyungpook National University, 2559 Gyeongsang-daero, Sangju, Gyeongbuk 37224, South Korea
| | - Byung Joon Lee
- Energy Environment Institute, Kyungpook National University, 2559 Gyeongsang-daero, Sangju, Gyeongbuk 37224, South Korea; Department of Advanced Science and Technology Convergence, Kyungpook National University, 2559 Gyeongsang-daero, Sangju, Gyeongbuk 37224, South Korea.
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Soluble Extracellular Polymeric Substances Produced by Parachlorella kessleri and Chlorella vulgaris: Biochemical Characterization and Assessment of Their Cadmium and Lead Sorption Abilities. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27217153. [PMID: 36363977 PMCID: PMC9653888 DOI: 10.3390/molecules27217153] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/17/2022] [Accepted: 10/20/2022] [Indexed: 12/15/2022]
Abstract
In the present study, the potential of lead and cadmium removal by the extracellular polymeric substances (EPS) produced from Parachlorella kessleri and Chlorella vulgaris were investigated. Carbohydrates were the dominant components of EPS from both analyzed species. The contents of reducing sugars, uronic acids, and amino acids were higher in EPS synthesized by C. vulgaris than in EPS from P. kessleri. The analysis of the monosaccharide composition showed the presence of rhamnose, mannose and galactose in the EPS obtained from both species. The ICP-OES (inductively coupled plasma optical emission spectrometry) analyses demonstrated that C. vulgaris EPS showed higher sorption capacity in comparison to P. kessleri EPS. The sorption capacity of C. vulgaris EPS increased with the increase in the amount of metal ions. P. kessleri EPS had a maximum sorption capacity in the presence of 100 mg/L of metal ions. The FTIR analysis demonstrated that the carboxyl, hydroxyl, and carbonyl groups of EPS play a key role in the interactions with metal ions. The present study showed C. vulgaris EPS can be used as a biosorbent in bioremediation processes due to its biochemical composition, the presence of significant amounts of negatively charged uronic acids, and higher sorption capacity.
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Yadav K, Vasistha S, Nawkarkar P, Kumar S, Rai MP. Algal biorefinery culminating multiple value-added products: recent advances, emerging trends, opportunities, and challenges. 3 Biotech 2022; 12:244. [PMID: 36033914 PMCID: PMC9402873 DOI: 10.1007/s13205-022-03288-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 07/29/2022] [Indexed: 11/01/2022] Open
Abstract
Algal biorefinery is rising as a prominent solution to economically fulfill the escalating global requirement for nutrition, feed, fuel, and medicines. In recent years, scientific productiveness associated with microalgae-based studies has elaborated in multiplied aspects, while translation to the commercial level continues to be missing. The present microalgal biorefinery has a challenge in long-term viability due to escalated market price of algal-mediated biofuels and bioproducts. Advancements are required in a few aspects like improvement in algae processing, energy investment, and cost analysis of microalgae biorefinery. Therefore, it is essential to recognize the modern work by understanding the knowledge gaps and hotspots driving business scale up. The microalgae biorefinery integrated with energy-based products, bioactive and green compounds, focusing on a circular bioeconomy, is urgently needed. A detailed investigation of techno-economic analysis (TEA) and life cycle assessment (LCA) is important to increase the market value of algal products. This review discusses the valorization of algal biomass for the value-added application that holds a sustainable approach and cost-competitive algal biorefinery. The current industries, policies, technology transfer trends, challenges, and future economic outlook are discussed. This study is an overview through scientometric investigation attempt to describe the research development contributing to this rising field.
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Affiliation(s)
- Kushi Yadav
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Sector-125, Noida, Uttar Pradesh 201313 India
| | - Shrasti Vasistha
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Sector-125, Noida, Uttar Pradesh 201313 India
| | - Prachi Nawkarkar
- International Centre for Genetic Engineering and Biotechnology (ICGEB), New Delhi, 110067 India
| | - Shashi Kumar
- International Centre for Genetic Engineering and Biotechnology (ICGEB), New Delhi, 110067 India
| | - Monika Prakash Rai
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Sector-125, Noida, Uttar Pradesh 201313 India
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Promising Biomolecules with High Antioxidant Capacity Derived from Cryptophyte Algae Grown under Different Light Conditions. BIOLOGY 2022; 11:biology11081112. [PMID: 35892969 PMCID: PMC9331842 DOI: 10.3390/biology11081112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/21/2022] [Accepted: 07/22/2022] [Indexed: 11/17/2022]
Abstract
The accumulation and production of biochemical compounds in microalgae are influenced by available light quality and algal species-specific features. In this study, four freshwater cryptophyte strains (Cryptomonas ozolinii, C. pyrenoidifera, C. curvata, and C. sp. (CPCC 336)) and one marine strain (Rhodomonas salina) were cultivated under white (control), blue, and green (experimental conditions) lights. Species-specific responses to light quality were detected, i.e., the color of light significantly affected cryptophyte biomass productivity and biochemical compositions, but the optimal light for the highest chemical composition with high antioxidant capacity was different for each algal strain. Overall, the highest phycoerythrin (PE) content (345 mg g−1 dry weight; DW) was reached by C. pyrenoidifera under green light. The highest phenolic (PC) contents (74, 69, and 66 mg g−1 DW) were detected in C. curvata under control conditions, in C. pyrenoidifera under green light, and in C. ozolinii under blue light, respectively. The highest exopolysaccharide (EPS) content (452 mg g−1 DW) was found in C. curvata under the control light. In terms of antioxidant activity, the biochemical compounds from the studied cryptophytes were highly active, with IC50 -values < 50 µg mL−1. Thus, in comparison to well-known commercial microalgal species, cryptophytes could be considered a possible candidate for producing beneficial biochemical compounds.
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Microalgae Strain Porphyridium purpureum for Nutrient Reduction in Dairy Wastewaters. SUSTAINABILITY 2022. [DOI: 10.3390/su14148545] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This paper has approached the study of dairy wastewater treatment and the simultaneous biocompound production by Porphyridium purpureum under continuous light and under a day–night cycle. The main goals were to achieve a reduction in the lactose content of the cheese wastewater that was tested and, at the same time, to obtain added value from the produced compounds, so as to increase the economic value of the process. The results show that biomass production increases proportionally with the concentration of lactose for both of the illumination options. The lactose concentration in the waste stream was reduced over 90% in just 7 days. The exopolysaccharide concentration in the growth medium increased with lactose availability. For the samples that were under constant light stress, the concentration of phycobiliproteins was highest when there was small amounts of lactose in the medium. The content of pigments was higher in the case of the day–night cycle of illumination; these being affected by stress factors such as continuous light and high lactose concentration. The results that were obtained prove that dairy wastewaters that are rich in lactose can be used efficiently for the growth of Porphyridium purpureum, achieving an increase in the biomass concentration and a large reduction of the lactose from this waste stream while obtaining a microalgae biomass that is rich in valuable compounds.
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Srivastava N, Kumari S, Kurmi S, Pinnaka AK, Choudhury AR. Isolation, purification, and characterization of a novel exopolysaccharide isolated from marine bacteria Brevibacillus borstelensis M42. Arch Microbiol 2022; 204:399. [PMID: 35713724 DOI: 10.1007/s00203-022-02993-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 05/17/2022] [Indexed: 11/02/2022]
Abstract
Marine microbes produce polysaccharides with unique physicochemical and functional properties that help them survive in harsh marine environments. However, only a handful of marine exopolysaccharides (EPSs) have been reported to date. The present study explored the seashore of Visakhapatnam, India, to report a novel exopolysaccharide designated as Br42 produced by Brevibacillus borstelensis M42. The isolate was identified through morphological, biochemical, phylogenetic, and genome sequencing analysis. The studies on fermentation kinetics revealed that EPS Br42 was a primary metabolite with a maximum production of 1.88 ± 0.02 g/L after 60 h when production broth was fortified with 2% glucose. Additionally, EPS Br42 was found to be a heteropolysaccharide consisting of glucose and galacturonic acid with a molecular weight of about 286 kDa. Interestingly, this molecule possesses industrially relevant functional properties such as water-holding (510 ± 0.35%), oil-holding (374 ± 0.12% for coconut oil and 384 ± 0.35% for olive oil), and swelling capacities (146.6 ± 5.75%). EPS Br42 could form an emulsion that was stable at a wide pH range for about 72 h and, in fact, performed better as compared to Span 20, a commercially used synthetic emulsifier. Moreover, this EPS was also found to be heat stable and exhibited non-Newtonian pseudoplastic behavior. These physicochemical and functional properties of polysaccharides suggest that the EPS Br42 has potential for multifarious industrial applications as an emulsifier, stabilizer, viscosifier, and binding agent.
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Affiliation(s)
- Nandita Srivastava
- Biochemical Engineering Research and Process Development Centre (BERPDC), Institute of Microbial Technology (IMTECH), Council of Scientific and Industrial Research (CSIR), Sector 39A, Chandigarh, 160036, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Sumeeta Kumari
- Microbial Type Culture Collection and Gene Bank (MTCC), Institute of Microbial Technology (IMTECH), Council of Scientific and Industrial Research (CSIR), Sector 39A, Chandigarh, 160036, India
| | - Shubham Kurmi
- Biochemical Engineering Research and Process Development Centre (BERPDC), Institute of Microbial Technology (IMTECH), Council of Scientific and Industrial Research (CSIR), Sector 39A, Chandigarh, 160036, India
| | - Anil Kumar Pinnaka
- Microbial Type Culture Collection and Gene Bank (MTCC), Institute of Microbial Technology (IMTECH), Council of Scientific and Industrial Research (CSIR), Sector 39A, Chandigarh, 160036, India
| | - Anirban Roy Choudhury
- Biochemical Engineering Research and Process Development Centre (BERPDC), Institute of Microbial Technology (IMTECH), Council of Scientific and Industrial Research (CSIR), Sector 39A, Chandigarh, 160036, India.
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Goswami RK, Agrawal K, Verma P. An exploration of natural synergy using microalgae for the remediation of pharmaceuticals and xenobiotics in wastewater. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102703] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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49
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Lau ZL, Low SS, Ezeigwe ER, Chew KW, Chai WS, Bhatnagar A, Yap YJ, Show PL. A review on the diverse interactions between microalgae and nanomaterials: Growth variation, photosynthetic performance and toxicity. BIORESOURCE TECHNOLOGY 2022; 351:127048. [PMID: 35337989 DOI: 10.1016/j.biortech.2022.127048] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 05/09/2023]
Abstract
Vast improvements in nanotechnology have led to the wide usage of nanomaterials (NMs) in daily products. This study reviews the interactions between NMs and microalgae in terms of impacts on growth and photosynthetic efficiency, and their toxicity on microalgae. All types of NMs such as carbon-based NMs (CNMs), metal oxide-based NMs (MONMs) and noble metal-based NMs (NMNMs) improve microalgal growth and photosynthetic efficiency at low concentration, typically ranging between 1 and 15 mg/L depending on the type of NMs, due to hormetic responses by microalgae. Higher concentrations of NMs have been found to reduce photosynthetic efficiency and subsequent growth inhibition of microalgae. MONMs-microalgae and NMNMs-microalgae interactions focus on membrane alteration, whereas carbon-based NMs-microalgae focus more on shading effect. The toxicity of each type of NMs on microalgae is in the order rGO > GO > MG > CNT for carbon-based NMs, ZnO > TiO2 > CuO > Fe2O3 for MONMs and Ag > Au > Pt for NMNMs. Incorporation of NMs in microalgae are seen to have promising future on producing higher microalgae yield with increased economic efficiency.
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Affiliation(s)
- Zhi Lin Lau
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
| | - Sze Shin Low
- Research Centre of Life Science and Healthcare, China Beacons Institute, University of Nottingham Ningbo China, 199 Taikang East Road, Ningbo 315100, Zhejiang, PR China
| | - Ejikeme Raphael Ezeigwe
- Institute for Sustainable Energy/College of Sciences, Shanghai University, Shanghai 200444, PR China; Zhaoqing Leoch Battery Technology Co. Ltd., 518000 Guangdong, PR China
| | - Kit Wayne Chew
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900 Sepang, Selangor Darul Ehsan, Malaysia
| | - Wai Siong Chai
- School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, Guangdong, PR China; School of Mathematical Sciences, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
| | - Amit Bhatnagar
- Department of Separation Science, LUT School of Engineering Science, LUT University, Sammonkatu 12, FI-50130 Mikkeli, Finland
| | - Yee Jiun Yap
- School of Mathematical Sciences, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia.
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Abstract
Microalgae are used in flocculation processes because biopolymers are released into the culture medium. Microalgal cell growth under specific conditions (temperature, pH, luminosity, nutrients, and salinity) provides the production and release of exopolysaccharides (EPS). These biopolymers can be recovered from the medium for application as bioflocculants or used directly in cultivation as microalgae autoflocculants. The optimization of nutritional parameters, the control of process conditions, and the possibility of scaling up allow the production and industrial application of microalgal EPS. Therefore, this review addresses the potential use of EPS produced by microalgae in bioflocculation. The recovery, determination, and quantification techniques for these biopolymers are also addressed. Moreover, other technological applications of EPS are highlighted.
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