1
|
Xu P, Shao S, Qian J, Li J, Xu R, Liu J, Zhou W. Scale-up of microalgal systems for decarbonization and bioproducts: Challenges and opportunities. BIORESOURCE TECHNOLOGY 2024; 398:130528. [PMID: 38437968 DOI: 10.1016/j.biortech.2024.130528] [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: 01/11/2024] [Revised: 03/01/2024] [Accepted: 03/01/2024] [Indexed: 03/06/2024]
Abstract
The threat of global climate change presents a significant challenge for humanity. Microalgae-based carbon capture and utilization (CCU) technology has emerged as a promising solution to this global issue. This review aims to comprehensively evaluate the current advancements in scale-up of microalgae cultivation and its applications, specifically focusing on decarbonization from flue gases, organic wastewater remediation, and biogas upgrading. The study identifies critical challenges that need to be addressed during the scale-up process and evaluates the economic viability of microalgal CCU within the carbon market. Additionally, it analyzes the commercial status of microalgae-derived products and highlights those with high market demand. This review serves as a crucial resource for researchers, industry professionals, and policymakers to develop and implement innovative approaches to enhance the efficiency of microalgae-based CO2 utilization while addressing the challenges associated with the scale-up of microalgae technologies.
Collapse
Affiliation(s)
- Peilun Xu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| | - Shengxi Shao
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| | - Jun Qian
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| | - Jingjing Li
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| | - Rui Xu
- Jiangxi Ganneng Co., Ltd, Nanchang 330096, China.
| | - Jin Liu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| | - Wenguang Zhou
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| |
Collapse
|
2
|
Kalwani M, Kumari A, Rudra SG, Chhabra D, Pabbi S, Shukla P. Application of ANN-MOGA for nutrient sequestration for wastewater remediation and production of polyunsaturated fatty acid (PUFA) by Chlorella sorokiniana MSP1. CHEMOSPHERE 2024; 349:140835. [PMID: 38043617 DOI: 10.1016/j.chemosphere.2023.140835] [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: 07/16/2023] [Revised: 10/24/2023] [Accepted: 11/26/2023] [Indexed: 12/05/2023]
Abstract
Chlorella bears excellent potential in removing nutrients from industrial wastewater and lipid production enriched with polyunsaturated fatty acids. However, due to the changing nutrient dynamics of wastewater, growth and metabolic activity of Chlorella are affected. In order to sustain microalgal growth in wastewater with concomitant production of PUFA rich lipids, RSM (Response Surface Methodology) followed by heuristic hybrid computation model ANN-MOGA (Artificial Neural Network- Multi-Objective Genetic Algorithm) were implemented. Preliminary experiments conducted taking one factor at a time and design matrix of RSM with process variables viz. Sodium chloride (1 mM-40 mM), Magnesium sulphate (100 mg-800 mg) and incubation time (4th day to 20th day) were validated by ANN-MOGA. The study reported improved biomass and lipid yield by 54.25% and 12.76%, along with total nitrogen and phosphorus removal by 21.92% and 18.72% respectively using ANN-MOGA. It was evident from FAME results that there was a significantly improved concentration of linoleic acid (19.1%) and γ-linolenic acid (21.1%). Improved PUFA content makes it a potential feedstock with application in cosmeceutical, pharmaceutical and nutraceutical industry. The study further proves that C. sorokiniana MSP1 mediated industrial wastewater treatment with PUFA production is an effective way in providing environmental benefits along with value addition. Moreover, ANN-MOGA is a relevant tool that could control microalgal growth in wastewater.
Collapse
Affiliation(s)
- Mohneesh Kalwani
- Enzyme Technology and Protein Bioinformatics Laboratory, School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India; Centre for Conservation and Utilisation of Blue Green Algae (CCUBGA), Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Arti Kumari
- Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Shalini G Rudra
- Division of Food Science and Post Harvest Technology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Deepak Chhabra
- Department of Mechanical Engineering, University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, Haryana, India
| | - Sunil Pabbi
- Centre for Conservation and Utilisation of Blue Green Algae (CCUBGA), Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India.
| | - Pratyoosh Shukla
- Enzyme Technology and Protein Bioinformatics Laboratory, School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India.
| |
Collapse
|
3
|
Agyeman-Duah E, Okonkwo CC, Ujor VC. Microbial removal of nutrients from anaerobic digestate: assessing product-coupled and non-product-coupled approaches. Front Microbiol 2023; 14:1299402. [PMID: 38146449 PMCID: PMC10749329 DOI: 10.3389/fmicb.2023.1299402] [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: 09/22/2023] [Accepted: 11/27/2023] [Indexed: 12/27/2023] Open
Abstract
Although anaerobic digestate contains >90% water, the high nutrient content of digestate makes it economically and technically intractable to treatment by existing wastewater treatment technologies. This study separately assessed the feasibility of nutrient removal from digestate by Rhizopus delemar DSM 905 and a culture of phosphate-accumulating organisms (PAOs). With Rhizopus delemar DSM 905, we investigated concomitant nutrient removal from digestate-supplemented medium and fumaric acid production, as a potentially economical strategy for digestate treatment. Following the cultivation of R. delemar DSM 905 in a fermentation medium containing 25% (v/v) digestate, the concentrations of Al, Cr, Cu, Fe, K, Mg, Mn, Pb, and Zn reduced 40, 12, 74, 96, 12, 26, 23%, ~18, and 28%, respectively. Similarly, the concentrations of total phosphorus, total nitrogen, phosphate (PO4-P), ammonium (NH4-N), nitrate (NO3-N), and sulfur decreased 93, 88, 97, 98, 69, and 13%, respectively. Concomitantly, cultures supplemented with 25 and 15% (v/v) digestate produced comparable titers of fumarate (~11 and ~ 17 g/L, respectively) to the digestate un-supplemented control cultures. With PAOs, we assessed the removal of total phosphorus, total nitrogen, PO4-P, and NH4-N, of which the concentrations reduced 86, 90%, ~99, and 100%, respectively in 60% (v/v) digestate. This study provides additional bases for microbial removal of excess nutrients from anaerobic digestate, with the potential to engender future water recovery from this waste stream that is currently largely recalcitrant to treatment.
Collapse
Affiliation(s)
- Eric Agyeman-Duah
- Fermentation Science and Metabolic Engineering Group, Department of Food Science, University of Wisconsin-Madison, Madison, WI, United States
| | - Christopher C. Okonkwo
- Biotechnology Program, Department of Chemistry and Chemical Biology, The Roux Institute, Northeastern University, Portland, ME, United States
| | - Victor C. Ujor
- Fermentation Science and Metabolic Engineering Group, Department of Food Science, University of Wisconsin-Madison, Madison, WI, United States
| |
Collapse
|
4
|
De Paepe J, Garcia Gragera D, Arnau Jimenez C, Rabaey K, Vlaeminck SE, Gòdia F. Continuous cultivation of microalgae yields high nutrient recovery from nitrified urine with limited supplementation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118500. [PMID: 37542810 DOI: 10.1016/j.jenvman.2023.118500] [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: 03/26/2023] [Revised: 06/18/2023] [Accepted: 06/22/2023] [Indexed: 08/07/2023]
Abstract
Microalgae can play a key role in the bioeconomy, particularly in combination with the valorisation of waste streams as cultivation media. Urine is an example of a widely available nutrient-rich waste stream, and alkaline stabilization and subsequent full nitrification in a bioreactor yields a stable nitrate-rich solution. In this study, such nitrified urine served as a culture medium for the edible microalga Limnospira indica. In batch cultivation, nitrified urine without additional supplements yielded a lower biomass concentration, nutrient uptake and protein content compared to modified Zarrouk medium, as standard medium. To enhance the nitrogen uptake efficiency and biomass production, nitrified urine was supplemented with potentially limiting elements. Limited amounts of phosphorus (36 mg L-1), magnesium (7.9 mg L-1), calcium (12.2 mg L-1), iron (2.0 mg L-1) and EDTA (88.5 mg Na2-EDTA.2H2O L-1) rendered the nitrified urine matrix as effective as modified Zarrouk medium in terms of biomass production (OD750 of 1.2), nutrient uptake (130 mg N L-1) and protein yield (47%) in batch culture. Urine precipitates formed by alkalinisation could in principle supply enough phosphorus, calcium and magnesium, requiring only external addition of iron, EDTA and inorganic carbon. Subsequently, the suitability of supplemented nitrified urine as a culture medium was confirmed in continuous Limnospira cultivation in a CSTR photobioreactor. This qualifies nitrified urine as a valuable and sustainable microalgae growth medium, thereby creating novel nutrient loops on Earth and in Space, i.e., in regenerative life support systems for human deep-space missions.
Collapse
Affiliation(s)
- Jolien De Paepe
- MELiSSA Pilot Plant - Laboratory Claude Chipaux, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Spain; Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Gent, Belgium; Centre for Advanced Process Technology for Urban Resource Recovery (CAPTURE), Belgium; Research Group of Sustainable Energy, Air and Water Technology, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerpen, Belgium
| | - David Garcia Gragera
- MELiSSA Pilot Plant - Laboratory Claude Chipaux, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
| | - Carolina Arnau Jimenez
- MELiSSA Pilot Plant - Laboratory Claude Chipaux, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
| | - Korneel Rabaey
- Centre for Advanced Process Technology for Urban Resource Recovery (CAPTURE), Belgium
| | - Siegfried E Vlaeminck
- Centre for Advanced Process Technology for Urban Resource Recovery (CAPTURE), Belgium; Research Group of Sustainable Energy, Air and Water Technology, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerpen, Belgium.
| | - Francesc Gòdia
- MELiSSA Pilot Plant - Laboratory Claude Chipaux, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
| |
Collapse
|
5
|
Abidizadegan M, Blomster J, Peltomaa E. Effect of micronutrient iron on bioactive compounds isolated from cryptophytes. FRONTIERS IN PLANT SCIENCE 2023; 14:1208724. [PMID: 37575946 PMCID: PMC10413267 DOI: 10.3389/fpls.2023.1208724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 07/07/2023] [Indexed: 08/15/2023]
Abstract
Iron is one of the important micronutrients affecting algal growth due to its fundamental role in the physiological processes, including photosynthetic electron transport, respiration, and nitrogen fixation. In this study, the effect of different iron levels on growth and the production of bioactive compounds (phycoerythrin (PE), extracellular polymeric substances (EPS), and phenolic compounds (PCs)) of five cryptophyte strains were investigated. Also, the antioxidant capacity of the bioactive compounds was explored. The results showed species-specific responses to the impact of iron on growth of cryptophytes and accumulation of bioactive compounds. The growth rates of C. pyrenoidifera and Cryptomonas sp. varied significantly at different iron levels, and a reduction in the PE content was observed for several cryptophytes cultured at the highest iron level. However, no significant differences were detected in EPS content at different iron levels. Differences in PC contents of C. pyrenoidifera and Cryptomonas sp. at medium iron level were statistically significant compared with the other two treatments. The results also revealed species-specific differences in antioxidant activity at different iron levels; each studied strain followed its own pattern in response to change in iron level, and each bioactive compound had a different antioxidant activity. Overall, however, PCs demonstrated higher antioxidant activity than PE and EPS. In summary, iron has an impact on growth, bioactive compound accumulation, and antioxidant activity. However, the species-specific responses to changes in iron level should not be ignored when modifying culture conditions for optimal harvest of bioactive compounds.
Collapse
Affiliation(s)
- Maryam Abidizadegan
- Ecosystem and Environment Research Program, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Jaanika Blomster
- Ecosystem and Environment Research Program, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Elina Peltomaa
- Department of Forest Sciences, University of Helsinki, Helsinki, Finland
| |
Collapse
|
6
|
Isani G, Ferlizza E, Bertocchi M, Dalmonte T, Menotta S, Fedrizzi G, Andreani G. Iron Content, Iron Speciation and Phycocyanin in Commercial Samples of Arthrospira spp. Int J Mol Sci 2022; 23:ijms232213949. [PMID: 36430428 PMCID: PMC9698952 DOI: 10.3390/ijms232213949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/05/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
Abstract
Cyanobacteria are characterized by high iron content. In this research, we collected ten commercial samples of Arthrospira spp. sold as food supplement to determine iron content and assess whether iron speciation showed variability among samples and changed respect to A. platensis grown in controlled conditions. Particular attention was also paid to phycocyanin, as an iron-binding protein. In six of the ten samples, 14 essential and non-essential trace elements were analysed using ICP-MS. Iron content measured in samples using atomic absorption spectrometry (AAS) varied from 353 (sample S5) to 1459 (sample S7) µg g-1 dry weight and was in the range of those reported by other authors in commercial supplements. Iron speciation was studied using size exclusion chromatography followed by the analysis of the collected fraction for the determination of iron by AAS and for protein separation using SDS-PAGE. Overlapping chromatographic profiles were obtained for total proteins, phycocyanin and iron, although quantitative differences were evidenced among the samples analysed. In most samples, iron was mainly bound to ligands with high molecular mass; however, in four samples iron was also bound to ligands with low molecular mass. In fractions containing the most relevant iron burden, the principal protein was phycocyanin, confirming its role as an iron-binding protein in commercial samples.
Collapse
Affiliation(s)
- Gloria Isani
- Department of Veterinary Medical Sciences, Alma Mater Studiorum, University of Bologna, Via Tolara di sopra 50, 40064 Ozzano dell’Emilia, Italy
| | - Enea Ferlizza
- Department of Experimental, Diagnostic and Specialty Medicine, Alma Mater Studiorum, University of Bologna, Via Belmeloro 8, 40126 Bologna, Italy
- Correspondence:
| | - Martina Bertocchi
- Department of Veterinary Medical Sciences, Alma Mater Studiorum, University of Bologna, Via Tolara di sopra 50, 40064 Ozzano dell’Emilia, Italy
| | - Thomas Dalmonte
- Department of Veterinary Medical Sciences, Alma Mater Studiorum, University of Bologna, Via Tolara di sopra 50, 40064 Ozzano dell’Emilia, Italy
| | - Simonetta Menotta
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna, Chemical Department, Via P. Fiorini 5, 40127 Bologna, Italy
| | - Giorgio Fedrizzi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna, Chemical Department, Via P. Fiorini 5, 40127 Bologna, Italy
| | - Giulia Andreani
- Department of Veterinary Medical Sciences, Alma Mater Studiorum, University of Bologna, Via Tolara di sopra 50, 40064 Ozzano dell’Emilia, Italy
| |
Collapse
|
7
|
Qiu S, Wu Z, Chen Z, Abbew AW, Li J, Ge S. Microalgal Activity and Nutrient Uptake from Wastewater Enhanced by Nanoscale Zerovalent Iron: Performance and Molecular Mechanism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:585-594. [PMID: 34933554 DOI: 10.1021/acs.est.1c05503] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Microalgae-based bioremediation presents an alternative to traditional biological wastewater treatment. However, its efficiency is still challenging due to low microalgal activities and growth rate in wastewater. Iron plays an important role in microbial metabolism and is effective to stimulate microbial growth. In this study, a novel approach was proposed to simultaneously promote microalgal activity and nutrient uptake from wastewater using nanoscale zerovalent iron (nZVI), and the underlying molecular mechanism was explored. Compared to the control, 0.05 mg/L of nZVI significantly enhanced biomass production by 113.3% as well as NH4+-N and PO43--P uptake rates by 32.2% and 75.0%, respectively. These observations were attributed to the enhanced metabolic pathways and intracellular regulations. Specifically, nZVI alleviated the cellular oxidative stress via decreased peroxisome biogenesis as indicated by reduced reactive oxygen species, enzymes, and genes involved. nZVI promoted ammonium assimilation, phosphate metabolism, carbon fixation, and energy generation. Moreover, nZVI regulated the biosynthesis and conversions of intracellular biocomposition, leading to increased carotenoid, carbohydrate, and lipid productions and decreased protein and fatty acid yields. The above metabolisms were supported by the regulations of differentially expressed genes involved. This study provided an nZVI-based approach and molecular mechanism for enhancing microalgal activities and nutrient uptake from wastewater.
Collapse
Affiliation(s)
- Shuang Qiu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Zhengshuai Wu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Zhipeng Chen
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Abdul-Wahab Abbew
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Jinxiang Li
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Shijian Ge
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| |
Collapse
|
8
|
Sipaúba-Tavares LH, Tedesque MG, Colla LC, Millan RN, Scardoeli-Truzzi B. Effect of untreated and pretreated sugarcane molasses on growth performance of Haematococcus pluvialis microalgae in inorganic fertilizer and macrophyte extract culture media. BRAZ J BIOL 2022; 82:e263282. [DOI: 10.1590/1519-6984.263282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 07/18/2022] [Indexed: 12/23/2022] Open
Abstract
Abstract The growth of Haematococcus pluvialis in two alternative culture media NPK (10:10:10) and ME (macrophyte extract), under mixotrophic conditions using sugarcane molasses as a carbon source were evaluated for 28 days. The molasses was used in two different ways, in a native form (untreated) and a hydrolyzed (pretreated). Cell density of Haematococcus pluvialis in mixotrophic cultivation was higher in pretreated molasses. Growth rate was higher when pretreated molasses were employed in mixotrophic cultivation with NPK culture medium (k=0.5 7th growth day). Biomass, chlorophyll-a, conductivity and total inorganic nitrogen were not significantly different (p>0.05) during the experimental period for two mixotrophic cultivation and culture media. Protein contents of H. pluvialis biomass were higher in NPK culture medium with pretreated molasses (50% dry biomass). Annual biomass production was 520 kg-1 dry biomass with untreated molasses for two culture media, and 650 and 520 kg-1 dry biomass with pretreated molasses for NPK and ME culture media, respectively. The use of NPK and ME culture media in mixotrophic cultivation may be a new protocol for H. pluvialis cultivation due to the low cost and similar annual production.
Collapse
Affiliation(s)
| | - M. G. Tedesque
- Universidade Estadual Paulista “Júlio de Mesquita Filho”, Brasil
| | - L. C. Colla
- Universidade Estadual Paulista “Júlio de Mesquita Filho”, Brasil
| | | | | |
Collapse
|
9
|
Rossi S, Visigalli S, Castillo Cascino F, Mantovani M, Mezzanotte V, Parati K, Canziani R, Turolla A, Ficara E. Metal-based flocculation to harvest microalgae: a look beyond separation efficiency. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 799:149395. [PMID: 34426344 DOI: 10.1016/j.scitotenv.2021.149395] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/08/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
Metal-based flocculants are commonly used for biomass harvesting in microalgae-based bio-refineries. Besides the high separation efficiency, additional aspects should be considered, related to the toxicity of metals for the algal biomass. Partitioning tests for commonly used flocculants (i.e., FeCl3 and Al2(SO4)3) showed that metals were mostly transferred to the solid phase with more than 95% of dosed metal ending up into the biomass, and low metal concentrations in the liquid effluent (lower than 0.4 mg L-1 for both metals), thus allowing for water reuse. Photosynthesis inhibition was tested on microalgae and microalgae-bacteria cultures, using a standardized photo-respirometry protocol in which typical concentrations used during coagulation-flocculation were assessed. Modelling dose-response curves, concentrations corresponding to 50% inhibition (IC50) were obtained, describing short-term effects. The obtained IC50 ranged from 13.7 to 28.3 mg Al L-1 for Al, and from 127.9 to 195.8 mg Fe L-1 for Fe, showing a higher toxicity for the Al-based flocculant. The recovery of photosynthesis inhibition was also quantified, to evaluate the possibility of reusing/recycling the harvested biomass. The results highlighted that the residual photosynthetic activities, evaluated after 1 h and 24 h of exposure to metals were partially recovered, especially for Al, passing from 67.3% to 94.6% activity, respectively, while long-term Fe effects were stronger (passing from 64.9% to 77.6% activity). A non-toxic flocculant (cationic starch) was finally tested, excluding potential effects due to biomass aggregation, as the reduction of photosynthetic activity only reached 3.4%, compared to control. Relevant modifications to the light availability and the optical properties of algal suspensions were assessed, identifying a strong effect of iron which caused an increase of the light absorbance up to approximately 40% at high Fe concentrations. Possible implications of dosing metallic flocculants in MBWWT processes are discussed, and suggestions are given to perform inhibition tests on flocculating chemicals.
Collapse
Affiliation(s)
- S Rossi
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - S Visigalli
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - F Castillo Cascino
- Istituto Sperimentale Italiano Lazzaro Spallanzani, Località La Quercia, 26027 Rivolta d'Adda, Italy
| | - M Mantovani
- Università degli Studi di Milano-Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milan, Italy
| | - V Mezzanotte
- Università degli Studi di Milano-Bicocca, Department of Earth and Environmental Sciences (DISAT), P.zza della Scienza 1, 20126 Milan, Italy
| | - K Parati
- Istituto Sperimentale Italiano Lazzaro Spallanzani, Località La Quercia, 26027 Rivolta d'Adda, Italy
| | - R Canziani
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - A Turolla
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - E Ficara
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA), P.zza L. da Vinci, 32, 20133 Milan, Italy.
| |
Collapse
|
10
|
Parichehreh R, Gheshlaghi R, Mahdavi MA, Kamyab H. Investigating the effects of eleven key physicochemical factors on growth and lipid accumulation of Chlorella sp. as a feedstock for biodiesel production. J Biotechnol 2021; 340:64-74. [PMID: 34454961 DOI: 10.1016/j.jbiotec.2021.08.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 08/08/2021] [Accepted: 08/21/2021] [Indexed: 01/22/2023]
Abstract
Biodiesel, as a renewable and eco-friendly energy source that can be produced through algae oil esterification, has recently received much attention. Maximization of algal biomass and lipid content is crucial for commercial biodiesel production. In this study, Chlorella sp. PG96, a microalgal strain isolated from urban wastewater, was identified considering its morphological and molecular characteristics. Fractional factorial design (211-7) was employed to screen medium and environmental factors for achieving high lipid productivity. The effects of eleven factors including light intensity, light spectrum, aeration rate, temperature, salinity, NaHCO3, CO2, NaNO3, NH4Cl, MgSO4.7H2O, and K2HPO4 and their interactions on growth characteristics of Chlorella sp. PG96 (biomass and lipid production) were statistically assessed. Based on the experimental results, lipid productivity was at its maximum (54.19 ± 8.40 mglipid L-1 day-1) under a combination of high levels of all factors. The analysis also showed that physical parameters of light intensity and temperature were more effective on algal growth compared to nutritional parameters. Furthermore, nitrogen source of ammonium and carbon source of bicarbonate played more significant roles in biomass and lipid production, compared with nitrate and CO2, respectively. Although the effect of sulfur limitation on cellular growth was similar to phosphorus deficiency, S-limitation had a greater impact on lipid accumulation. The interaction between NaHCO3 and NH4Cl was the most prominent interaction affecting all responses. It is concluded that Chlorella sp. PG96 at a high level of light intensity and temperature (22500 Lux and 32 °C, respectively) can be a prospective candidate for biodiesel production.
Collapse
Affiliation(s)
- Roya Parichehreh
- Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Azadi Square, Pardis Campus, Mashhad, Khorasan Razavi, Iran, Postal Code 9177948944.
| | - Reza Gheshlaghi
- Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Azadi Square, Pardis Campus, Mashhad, Khorasan Razavi, Iran, Postal Code 9177948944.
| | - Mahmood Akhavan Mahdavi
- Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Azadi Square, Pardis Campus, Mashhad, Khorasan Razavi, Iran, Postal Code 9177948944.
| | - Hesam Kamyab
- Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100 Kuala Lumpur, Malaysia.
| |
Collapse
|
11
|
Patnaik R, Mallick N. Microalgal Biodiesel Production: Realizing the Sustainability Index. Front Bioeng Biotechnol 2021; 9:620777. [PMID: 34124015 PMCID: PMC8193856 DOI: 10.3389/fbioe.2021.620777] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 01/25/2021] [Indexed: 11/13/2022] Open
Abstract
Search for new and renewable sources of energy has made research reach the tiny little tots, microalgae for the production of biodiesel. But despite years of research on the topic, a definitive statement, declaring microalgae as an economically, environmentally, and socially sustainable resource is yet to be seen or heard of. With technological and scientific glitches being blamed for this delay in the progress of the production system, an assessment of the sustainability indices achieved so far by the microalgal biodiesel is important to be done so as to direct future research efforts in a more coordinated manner to achieve the sustainability mark. This article provides a review of the current economic, environmental, and social status of microalgal biodiesel and the strategies adopted to achieve them, with suggestions to address the challenges faced by the microalgal biodiesel production system.
Collapse
Affiliation(s)
- Reeza Patnaik
- Department of Agricultural and Food Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Nirupama Mallick
- Department of Agricultural and Food Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India
| |
Collapse
|
12
|
Charria-Girón E, Amazo V, De Angulo D, Hidalgo E, Villegas-Torres MF, Baganz F, Caicedo Ortega NH. Strategy for Managing Industrial Anaerobic Sludge through the Heterotrophic Cultivation of Chlorella sorokiniana: Effect of Iron Addition on Biomass and Lipid Production. Bioengineering (Basel) 2021; 8:bioengineering8060082. [PMID: 34200526 PMCID: PMC8228024 DOI: 10.3390/bioengineering8060082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/31/2021] [Accepted: 06/06/2021] [Indexed: 11/16/2022] Open
Abstract
Microalgae provides an alternative for the valorization of industrial by-products, in which the nutritional content varies substantially and directly affects microalgae system performance. Herein, the heterotrophic cultivation of Chlorella sorokiniana was systematically studied, allowing us to detect a nutritional deficiency other than the carbon source through assessing the oxygen transfer rate for glucose or acetate fermentation. Consequently, a mathematical model of the iron co-limiting effect on heterotrophic microalgae was developed by exploring its ability to regulate the specific growth rate and yield. For instance, higher values of the specific growth rate (0.17 h-1) compared with those reported for the heterotrophic culture of Chlorella were obtained due to iron supplementation. Therefore, anaerobic sludge from an industrial wastewater treatment plant (a baker's yeast company) was pretreated to obtain an extract as a media supplement for C. sorokiniana. According to the proposed model, the sludge extract allowed us to supplement iron values close to the growth activation concentration (KFe ~12 mg L-1). Therefore, a fed-batch strategy was evaluated on nitrogen-deprived cultures supplemented with the sludge extract to promote biomass formation and fatty acid synthesis. Our findings reveal that nitrogen and iron in sludge extract can supplement heterotrophic cultures of Chlorella and provide an alternative for the valorization of industrial anaerobic sludge.
Collapse
Affiliation(s)
- Esteban Charria-Girón
- Departamento de Ingeniería Bioquímica, Facultad de Ingeniería, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia; (E.C.-G.); (V.A.); (D.D.A.); (E.H.)
| | - Vanessa Amazo
- Departamento de Ingeniería Bioquímica, Facultad de Ingeniería, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia; (E.C.-G.); (V.A.); (D.D.A.); (E.H.)
| | - Daniela De Angulo
- Departamento de Ingeniería Bioquímica, Facultad de Ingeniería, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia; (E.C.-G.); (V.A.); (D.D.A.); (E.H.)
| | - Eliana Hidalgo
- Departamento de Ingeniería Bioquímica, Facultad de Ingeniería, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia; (E.C.-G.); (V.A.); (D.D.A.); (E.H.)
| | - María Francisca Villegas-Torres
- Departamento de Ciencias Químicas, Facultad de Ciencias Naturales, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia;
- Centro BioInc, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia
| | - Frank Baganz
- Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK;
| | - Nelson. H. Caicedo Ortega
- Departamento de Ingeniería Bioquímica, Facultad de Ingeniería, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia; (E.C.-G.); (V.A.); (D.D.A.); (E.H.)
- Centro BioInc, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia
- Correspondence: ; Tel.: +57-318-754-8041
| |
Collapse
|
13
|
Sandgruber F, Gielsdorf A, Baur AC, Schenz B, Müller SM, Schwerdtle T, Stangl GI, Griehl C, Lorkowski S, Dawczynski C. Variability in Macro- and Micronutrients of 15 Commercially Available Microalgae Powders. Mar Drugs 2021; 19:md19060310. [PMID: 34071995 PMCID: PMC8228358 DOI: 10.3390/md19060310] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/22/2021] [Accepted: 05/24/2021] [Indexed: 11/17/2022] Open
Abstract
The nutrient composition of 15 commercially available microalgae powders of Arthrospira platensis, Chlorella pyrenoidosa and vulgaris, Dunaliella salina, Haematococcus pluvialis, Tetraselmis chuii, and Aphanizomenon flos-aquae was analyzed. The Dunaliella salina powders were characterized by a high content of carbohydrates, saturated fatty acids (SFAs), omega-6-polyunsaturated fatty acids (n6-PUFAs), heavy metals, and α-tocopherol, whereas the protein amounts, essential amino acids (EAAs), omega-3-PUFAs (n3-PUFAs), vitamins, and minerals were low. In the powder of Haematococcus pluvialis, ten times higher amounts of carotenoids compared to all other analyzed powders were determined, yet it was low in vitamins D and E, protein, and EAAs, and the n6/n3-PUFAs ratio was comparably high. Vitamin B12, quantified as cobalamin, was below 0.02 mg/100 g dry weight (d.w.) in all studied powders. Based on our analysis, microalgae such as Aphanizomenon and Chlorella may contribute to an adequate intake of critical nutrients such as protein with a high content of EAAs, dietary fibers, n3-PUFAs, Ca, Fe, Mg, and Zn, as well as vitamin D and E. Yet, the nutritional value of Aphanizomenon flos-aquae was slightly decreased by high contents of SFAs. The present data show that microalgae are rich in valuable nutrients, but the macro- and micronutrient profiles differ strongly between and within species.
Collapse
Affiliation(s)
- Fabian Sandgruber
- Junior Research Group Nutritional Concepts, Institute of Nutritional Science, Friedrich Schiller University Jena, Dornburger Str. 29, 07743 Jena, Germany; (F.S.); (B.S.)
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Jena-Halle-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (G.I.S.); (S.L.)
| | - Annekathrin Gielsdorf
- Competence Center Algal Biotechnology, Anhalt University of Applied Science, Bernburger Straße 55, 06366 Köthen, Germany; (A.G.); (C.G.)
| | - Anja C. Baur
- Institute of Agricultural and Nutritional Science, Martin Luther University Halle-Wittenberg, Theodor-Lieser-Str. 11, 06120 Halle, Germany;
| | - Benjamin Schenz
- Junior Research Group Nutritional Concepts, Institute of Nutritional Science, Friedrich Schiller University Jena, Dornburger Str. 29, 07743 Jena, Germany; (F.S.); (B.S.)
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Jena-Halle-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (G.I.S.); (S.L.)
| | - Sandra Marie Müller
- Department of Food Chemistry, Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114–116, 14558 Nuthetal, Germany; (S.M.M.); (T.S.)
| | - Tanja Schwerdtle
- Department of Food Chemistry, Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114–116, 14558 Nuthetal, Germany; (S.M.M.); (T.S.)
- NutriAct-Competence Cluster Nutrition Research, Berlin-Potsdam, Arthur-Scheunert-Allee 114–116, 14558 Nuthetal, Germany
| | - Gabriele I. Stangl
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Jena-Halle-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (G.I.S.); (S.L.)
- Institute of Agricultural and Nutritional Science, Martin Luther University Halle-Wittenberg, Theodor-Lieser-Str. 11, 06120 Halle, Germany;
| | - Carola Griehl
- Competence Center Algal Biotechnology, Anhalt University of Applied Science, Bernburger Straße 55, 06366 Köthen, Germany; (A.G.); (C.G.)
| | - Stefan Lorkowski
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Jena-Halle-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (G.I.S.); (S.L.)
- Institute of Nutritional Science, Friedrich Schiller University Jena, Dornburger Str. 25, 07743 Jena, Germany
| | - Christine Dawczynski
- Junior Research Group Nutritional Concepts, Institute of Nutritional Science, Friedrich Schiller University Jena, Dornburger Str. 29, 07743 Jena, Germany; (F.S.); (B.S.)
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD) Jena-Halle-Leipzig, Dornburger Str. 25, 07743 Jena, Germany; (G.I.S.); (S.L.)
- Correspondence: ; Tel.: +49-(3641)-9-49656
| |
Collapse
|