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Policastro G, Ebrahimi S, Weissbrodt DG, Fabbricino M, van Loosdrecht MCM. Selecting for a high lipid accumulating microalgae culture by dual growth limitation in a continuous bioreactor. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169213. [PMID: 38097066 DOI: 10.1016/j.scitotenv.2023.169213] [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: 10/17/2023] [Revised: 12/06/2023] [Accepted: 12/06/2023] [Indexed: 12/25/2023]
Abstract
A dual-growth-limited continuous operated bioreactor (chemostat) was used to enhance lipid accumulation in an enrichment culture of microalgae. The light intensity and nitrogen concentration where both limiting factors resulting in high lipid accumulation in the mixed culture. Both conditions of light and nitrogen excess and deficiency were tested. Strategies to selectively enrich for a phototrophic lipid-storing community, based on the use of different nitrogen sources (ammonium vs. nitrate) and vitamin B supplementation in the growth medium, were evaluated. The dual limitation of both nitrogen and light enhanced the accumulation of storage compounds. Ammoniacal nitrogen was the preferred nitrogen source. Vitamin B supplementation led to a doubling of the lipid productivity. The availability of vitamins played a key role in selecting an efficient lipid-storing community, primarily consisting of Trebouxiophyceae (with an 82 % relative abundance among eukaryotic microorganisms). The obtained lipid volumetric productivity (387 mg L-1 d-1) was among the highest reported in literature for microalgae bioreactors. Lipid production by the microalgae enrichment surpassed the efficiencies reported for continuous microalgae pure cultures, highlighting the benefits of mixed-culture photo-biotechnologies for fuels and food ingredients in the circular economy.
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Affiliation(s)
- Grazia Policastro
- Department of Engineering and Computer Science, Telematic University Pegaso, Naples, Italy; Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Naples, Italy.
| | - Sirous Ebrahimi
- Biotechnology Research Center, Faculty of Chemical Engineering, Sahand University of Technology, Tabriz, Iran; Department of Biotechnology, Delft University of Technology, Delft, the Netherlands
| | - David G Weissbrodt
- Department of Biotechnology, Delft University of Technology, Delft, the Netherlands; Department of Biotechnology and Natural Sciences, Norwegian University of Science and Technology, Trondheim, Norway
| | - Massimiliano Fabbricino
- Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Naples, Italy
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2
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Wang M, Ye X, Bi H, Shen Z. Microalgae biofuels: illuminating the path to a sustainable future amidst challenges and opportunities. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2024; 17:10. [PMID: 38254224 PMCID: PMC10804497 DOI: 10.1186/s13068-024-02461-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 01/11/2024] [Indexed: 01/24/2024]
Abstract
The development of microalgal biofuels is of significant importance in advancing the energy transition, alleviating food pressure, preserving the natural environment, and addressing climate change. Numerous countries and regions across the globe have conducted extensive research and strategic planning on microalgal bioenergy, investing significant funds and manpower into this field. However, the microalgae biofuel industry has faced a downturn due to the constraints of high costs. In the past decade, with the development of new strains, technologies, and equipment, the feasibility of large-scale production of microalgae biofuel should be re-evaluated. Here, we have gathered research results from the past decade regarding microalgae biofuel production, providing insights into the opportunities and challenges faced by this industry from the perspectives of microalgae selection, modification, and cultivation. In this review, we suggest that highly adaptable microalgae are the preferred choice for large-scale biofuel production, especially strains that can utilize high concentrations of inorganic carbon sources and possess stress resistance. The use of omics technologies and genetic editing has greatly enhanced lipid accumulation in microalgae. However, the associated risks have constrained the feasibility of large-scale outdoor cultivation. Therefore, the relatively controllable cultivation method of photobioreactors (PBRs) has made it the mainstream approach for microalgae biofuel production. Moreover, adjusting the performance and parameters of PBRs can also enhance lipid accumulation in microalgae. In the future, given the relentless escalation in demand for sustainable energy sources, microalgae biofuels should be deemed a pivotal constituent of national energy planning, particularly in the case of China. The advancement of synthetic biology helps reduce the risks associated with genetically modified (GM) microalgae and enhances the economic viability of their biofuel production.
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Affiliation(s)
- Min Wang
- Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China.
| | - Xiaoxue Ye
- Sanya Research Institute of Chinese Academy of Tropical Agricultural Sciences, Sanya, 572025, China
| | - Hongwen Bi
- Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Zhongbao Shen
- Grass and Science Institute of Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China.
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3
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Yang X, Liu L, Liu X, Xie S, Feng J, Lv J. The responding mechanism of indigenous bacteria in municipal wastewater inoculated with different concentrations of exogenous microalgae. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118547. [PMID: 37433233 DOI: 10.1016/j.jenvman.2023.118547] [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: 04/05/2023] [Revised: 06/24/2023] [Accepted: 06/27/2023] [Indexed: 07/13/2023]
Abstract
Indigenous bacteria popularly exist in real wastewater. Therefore, the potential interaction between bacteria and microalgae is inevitable in microalgae-based wastewater treatment systems. It is likely to affect the performance of systems. Accordingly, the characteristics of indigenous bacteria is worth serious concerning. Here we investigated the response of indigenous bacterial communities to variant inoculum concentrations of Chlorococcum sp. GD in municipal wastewater treatment systems. The removal efficiency of COD, ammonium and total phosphorus were 92.50%-95.55%, 98.00%-98.69%, and 67.80%-84.72%, respectively. The bacterial community responded differently to different microalgal inoculum concentrations, which was mainly affected by microalgal number, ammonium and nitrate. Besides, there were differential co-occurrence patterns and carbon and nitrogen metabolic function of indigenous bacterial communities. All these results indicated that bacterial communities responded significantly to environmental changes caused by the change of microalgal inoculum concentrations. The response of bacterial communities to different microalgal inoculum concentrations was beneficial for forming a stable symbiotic community of both microalgae and bacteria to remove pollutants in wastewater.
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Affiliation(s)
- Xinyue Yang
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Linping Liu
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Xudong Liu
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Shulian Xie
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Jia Feng
- School of Life Science, Shanxi University, Taiyuan, 030006, China.
| | - Junping Lv
- School of Life Science, Shanxi University, Taiyuan, 030006, China.
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4
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Schaedig E, Cantrell M, Urban C, Zhao X, Greene D, Dancer J, Gross M, Sebesta J, Chou KJ, Grabowy J, Gross M, Kumar K, Yu J. Isolation of phosphorus-hyperaccumulating microalgae from revolving algal biofilm (RAB) wastewater treatment systems. Front Microbiol 2023; 14:1219318. [PMID: 37529323 PMCID: PMC10389661 DOI: 10.3389/fmicb.2023.1219318] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 06/23/2023] [Indexed: 08/03/2023] Open
Abstract
Excess phosphorus (P) in wastewater effluent poses a serious threat to aquatic ecosystems and can spur harmful algal blooms. Revolving algal biofilm (RAB) systems are an emerging technology to recover P from wastewater before discharge into aquatic ecosystems. In RAB systems, a community of microalgae take up and store wastewater P as polyphosphate as they grow in a partially submerged revolving biofilm, which may then be harvested and dried for use as fertilizer in lieu of mined phosphate rock. In this work, we isolated and characterized a total of 101 microalgae strains from active RAB systems across the US Midwest, including 82 green algae, 9 diatoms, and 10 cyanobacteria. Strains were identified by microscopy and 16S/18S ribosomal DNA sequencing, cryopreserved, and screened for elevated P content (as polyphosphate). Seven isolated strains possessed at least 50% more polyphosphate by cell dry weight than a microalgae consortium from a RAB system, with the top strain accumulating nearly threefold more polyphosphate. These top P-hyperaccumulating strains include the green alga Chlamydomonas pulvinata TCF-48 g and the diatoms Eolimna minima TCF-3d and Craticula molestiformis TCF-8d, possessing 11.4, 12.7, and 14.0% polyphosphate by cell dry weight, respectively. As a preliminary test of strain application for recovering P, Chlamydomonas pulvinata TCF-48 g was reinoculated into a bench-scale RAB system containing Bold basal medium. The strain successfully recolonized the system and recovered twofold more P from the medium than a microalgae consortium from a RAB system treating municipal wastewater. These isolated P-hyperaccumulating microalgae may have broad applications in resource recovery from various waste streams, including improving P removal from wastewater.
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Affiliation(s)
- Eric Schaedig
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
| | - Michael Cantrell
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
| | - Chris Urban
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
| | - Xuefei Zhao
- Gross-Wen Technologies, Slater, IA, United States
| | - Drew Greene
- Gross-Wen Technologies, Slater, IA, United States
| | - Jens Dancer
- Gross-Wen Technologies, Slater, IA, United States
| | | | - Jacob Sebesta
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
| | - Katherine J. Chou
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
| | - Jonathan Grabowy
- Metropolitan Water Reclamation District of Greater Chicago, Chicago, IL, United States
| | - Martin Gross
- Gross-Wen Technologies, Slater, IA, United States
| | - Kuldip Kumar
- Metropolitan Water Reclamation District of Greater Chicago, Chicago, IL, United States
| | - Jianping Yu
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
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Wang P, Shao Y, Geng Y, Mushtaq R, Yang W, Li M, Sun X, Wang H, Chen G. Advanced treatment of secondary effluent from wastewater treatment plant by a newly isolated microalga Desmodesmus sp. SNN1. Front Microbiol 2023; 14:1111468. [PMID: 36778876 PMCID: PMC9909749 DOI: 10.3389/fmicb.2023.1111468] [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: 11/29/2022] [Accepted: 01/02/2023] [Indexed: 01/27/2023] Open
Abstract
Secondary effluents contain considerable amounts of nitrogen and phosphorous, which if dumped untreated can cause eutrophication of the receiving water bodies. Microalgae can remove these nutrients and other pollutants from the wastewater effluents and play an effective role in the secondary effluent treatment. In this study, six microalgae strains (SNN1, SNN2, SNN3, SNN4, SNS1, and SNS2) were isolated and screened from the water and mud of Yingxue Lake of Shandong Jianzhu University, and their efficiencies for the removal of COD, NH4 +-N, TN, and TP in the secondary effluent were assessed. By comparing the growth performances and nutrient removal ability of algal strains in domestic sewage, we found that SNN1 (identified and named as Desmodesmus sp. SNN1) has the highest efficiency for biomass accumulation and sewage purification. Hence, the algal strain SNN1 was selected for further screening and optimization experiments. The strain showed higher biomass yield and better nutrient removal rate when the pH of secondary effluent was 9.0 and the initial inoculum concentration (optical density at 680 nm) of algal strain was 0.4. After 12 days of treatment, the concentrations of COD, NH4 +-N, TN, and TP in the secondary effluent were 31.79, 0.008, 8.631, and 0.069 mg/L, respectively. Therefore, SNN1 with the removal rates of 52.69% (COD), 99.99% (NH4 +-N), 89.09% (TN), and 94.64% (TP) displayed its high potential in nutrient removal. In addition, it also yielded 5.30 mg/L of chlorophyll a and 168.33 mg/L of lipids. These results demonstrated that this strain exhibited an effective treatment capacity for secondary effluent and microalgal oil production. This study is helpful to provide a strategy for the resource utilization of secondary effluent and the conservation of freshwater resources required by microalgae culture.
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Affiliation(s)
- Pengchong Wang
- Institute of Crop Germplasm Resources, Shandong Academy of Agricultural Sciences, Jinan, China,Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, China,School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, China
| | - Yahui Shao
- Institute of Crop Germplasm Resources, Shandong Academy of Agricultural Sciences, Jinan, China,Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, China
| | - Yun Geng
- Institute of Crop Germplasm Resources, Shandong Academy of Agricultural Sciences, Jinan, China,Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, China
| | - Rubina Mushtaq
- Institute of Crop Germplasm Resources, Shandong Academy of Agricultural Sciences, Jinan, China,Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, China,Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Wenlong Yang
- Institute of Crop Germplasm Resources, Shandong Academy of Agricultural Sciences, Jinan, China,Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, China
| | - Mei Li
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, China
| | - Xiuqin Sun
- Institute of Crop Germplasm Resources, Shandong Academy of Agricultural Sciences, Jinan, China,Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, China
| | - Hongbo Wang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, China,Hongbo Wang,
| | - Gao Chen
- Institute of Crop Germplasm Resources, Shandong Academy of Agricultural Sciences, Jinan, China,Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, China,*Correspondence: Gao Chen,
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Loria MH, Griffin JS, Wells GF, Rhoads KR. Effects of feast-famine nutrient regimes on wastewater algal biofuel communities. PLoS One 2023; 18:e0279943. [PMID: 36598899 DOI: 10.1371/journal.pone.0279943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 12/16/2022] [Indexed: 01/05/2023] Open
Abstract
Microalgae accumulate lipids in response to nutrient deprivation, and these lipids are a biodiesel fuel stock. Algal cultivation with secondary wastewater effluent is one proposed platform for biofuel production, which provides nutrients to algae while further polishing wastewater effluent. Algal bioreactors were tested using a feast-famine feeding regiment in simulated secondary wastewater effluent to evaluate the effects on lipid content and algal community structure. Algal polycultures were inoculated into reactors fed with synthetic secondary wastewater effluent at pH 7.5 and 9 and operated under a feast-famine nutrient (N, P, and BOD) supply regime in sequencing batch reactors. Fatty acid methyl ester contents of the reactors were assessed, which showed a decrease in lipid content after the feast-famine cycling (from 12.2% initially to 5.2% after four cycles at pH 9). This decrease in lipid content was not correlated with an increase in carbohydrate storage within biomass, nor an increase in bacterial biomass abundance relative to algal biomass in the reactors. The eukaryotic microbial communities from reactors operated at pH 9 diverged from reactors operated at pH 7.5 during cycling, with the pH 9 reactors becoming dominated by a single Operational Taxonomic Unit aligning to the Scenedesmus genus. These results suggest that high pH and feast-famine nutrient cycling may select for a less diverse algal community with a lower lipid content within a secondary wastewater polishing scheme.
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Affiliation(s)
- Mark H Loria
- Department of Civil and Environmental Engineering, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - James S Griffin
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois, United States of America
| | - George F Wells
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois, United States of America
| | - Kurt R Rhoads
- Department of Civil and Environmental Engineering, Case Western Reserve University, Cleveland, Ohio, United States of America
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Mohammadi SA, Najafi H, Zolgharnian S, Sharifian S, Asasian-Kolur N. Biological oxidation methods for the removal of organic and inorganic contaminants from wastewater: A comprehensive review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 843:157026. [PMID: 35772531 DOI: 10.1016/j.scitotenv.2022.157026] [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: 04/02/2022] [Revised: 06/03/2022] [Accepted: 06/24/2022] [Indexed: 06/15/2023]
Abstract
Enzyme-based bioremediation is a simple, cost-effective, and environmentally friendly method for isolating and removing a wide range of environmental pollutants. This study is a comprehensive review of recent studies on the oxidation of pollutants by biological oxidation methods, performed individually or in combination with other methods. The main bio-oxidants capable of removing all types of pollutants, such as organic and inorganic molecules, from fungi, bacteria, algae, and plants, and different types of enzymes, as well as the removal mechanisms, were investigated. The use of mediators and modification methods to improve the performance of microorganisms and their resistance under harsh real wastewater conditions was discussed, and numerous case studies were presented and compared. The advantages and disadvantages of conventional and novel immobilization methods, and the development of enzyme engineering to adjust the content and properties of the desired enzymes, were also explained. The optimal operating parameters such as temperature and pH, which usually lead to the best performance, were presented. A detailed overview of the different combination processes was also given, including bio-oxidation in coincident or consecutive combination with adsorption, advanced oxidation processes, and membrane separation. One of the most important issues that this study has addressed is the removal of both organic and inorganic contaminants, taking into account the actual wastewaters and the economic aspect.
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Affiliation(s)
- Seyed Amin Mohammadi
- Fouman Faculty of Engineering, College of Engineering, University of Tehran, Fouman 43581-39115, Iran
| | - Hanieh Najafi
- Fouman Faculty of Engineering, College of Engineering, University of Tehran, Fouman 43581-39115, Iran
| | - Sheida Zolgharnian
- TUM Campus Straubing for Biotechnology and Sustainability, Technical University of Munich, Schulgasse 16, 94315 Straubing, Germany
| | - Seyedmehdi Sharifian
- Fouman Faculty of Engineering, College of Engineering, University of Tehran, Fouman 43581-39115, Iran
| | - Neda Asasian-Kolur
- Fouman Faculty of Engineering, College of Engineering, University of Tehran, Fouman 43581-39115, Iran.
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Lee JC, Joo JH, Chun BH, Moon K, Song SH, Kim YJ, Lee SM, Lee AH. Isolation and screening of indigenous microalgae species for domestic and livestock wastewater treatment, biodiesel production, and carbon sequestration. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 318:115648. [PMID: 35949094 DOI: 10.1016/j.jenvman.2022.115648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 06/22/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
The use of indigenous microalgae strains for locally generated domestic (DWW) and livestock wastewater (LWW) treatment is essential for effective and economical applications. Phototrophic microalgae-based biofuel production also contributes to carbon sequestration via CO2 fixation. However, simultaneous consideration of both isolation and screening procedures for locally collected indigenous microalgae strains is not common in the literature. We aimed to isolate indigenous microalgae strains from locally collected samples on coastlines and islands in South Korea. Among five isolated strains, Chlorella sorokiniana JD1-1 was selected for DWW and LWW treatment due to its ability to grow in waste resources. This strain showed a higher specific growth rate in DWW than artificial growth medium (BG-11) with a range of 0.137-0.154 d-1. During cultivation, 96.5%-97.1% of total nitrogen in DWW and 89.2% in LWW was removed. Over 99% of total phosphorus in DWW and 96.4% in LWW was also removed. Finally, isolated C. sorokiniana JD1-1 was able to fix CO2 within a range of 0.0646-0.1043 g CO2 L-1 d-1. These results support the domestic applications of carbon sequestration-efficient microalgae in the waste-to-energy nexus.
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Affiliation(s)
- Jae-Cheol Lee
- Division of Environmental Materials, Honam National Institute of Biological Resources (HNIBR), Mokpo, 58762, Republic of Korea.
| | - Jae-Hyoung Joo
- Division of Environmental Materials, Honam National Institute of Biological Resources (HNIBR), Mokpo, 58762, Republic of Korea
| | - Byung Hee Chun
- Division of Environmental Materials, Honam National Institute of Biological Resources (HNIBR), Mokpo, 58762, Republic of Korea
| | - Kira Moon
- Division of Environmental Materials, Honam National Institute of Biological Resources (HNIBR), Mokpo, 58762, Republic of Korea
| | - Seung Hui Song
- Division of Environmental Materials, Honam National Institute of Biological Resources (HNIBR), Mokpo, 58762, Republic of Korea
| | - Yun Ji Kim
- Division of Environmental Materials, Honam National Institute of Biological Resources (HNIBR), Mokpo, 58762, Republic of Korea
| | - Sung Moon Lee
- Division of Environmental Materials, Honam National Institute of Biological Resources (HNIBR), Mokpo, 58762, Republic of Korea
| | - Aslan Hwanhwi Lee
- Division of Environmental Materials, Honam National Institute of Biological Resources (HNIBR), Mokpo, 58762, Republic of Korea
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9
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Suarez-Montes D, Borrell YJ, Gonzalez JM, Rico JM. Isolation and identification of microalgal strains with potential as carotenoids producers from a municipal solid waste landfill. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 802:149755. [PMID: 34525767 DOI: 10.1016/j.scitotenv.2021.149755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 08/12/2021] [Accepted: 08/15/2021] [Indexed: 06/13/2023]
Abstract
Derived from their great capacity of adaptation, microalgae have several industrial applications, including pigment production for nutraceutical sector. However, the scarcity of studies on the diversity and life histories from several environments, highlight the need for more research on new species and habitats. Based on this, the present study assessed the microalgal diversity in water bodies of a municipal solid waste (MSW) landfill in Asturias (Spain). A total of 14 strains were successfully isolated and scaled up in liquid monocultures. They were identified through a combination of morphologic features with molecular assignation by DNA barcoding via the 18S and ITS1-5.8S-ITS2 genes. The results of the genetic procedures (BLAST assignments and the 18S and ITS1-5.8S-ITS2 genealogies) showed that 10 of the 14 assayed isolates were identified at the species level. The available genetic data were not sufficient for species classifications of the remaining isolates. It is possible that some might be new species not previously studied or described. Indeed, a new species, Coelastrella cogersae, was proposed in this study. Moreover, 3 of the 14 isolates (including the newly proposed species) exhibited caretogenic activity under specific conditions during the culture. These results are a great step forward in both the screening of lesser-known environments and the discovery of new sources of bioactive compounds. The study could be of great value to the nutraceutical industries and markets.
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Affiliation(s)
- David Suarez-Montes
- Neoalgae Micro Seaweed Products, C/ Carmen Leal Mata 191, 33211 Gijón, Spain; Department of Organisms and Systems Biology, University of Oviedo, C/ Catedrático Valentín Andrés Álvarez s/n, 33006 Oviedo, Spain.
| | - Yaisel Juan Borrell
- Department of Functional Biology, University of Oviedo, C/ Catedrático Valentín Andrés Álvarez s/n, 33006 Oviedo, Spain
| | | | - Jose Manuel Rico
- Department of Organisms and Systems Biology, University of Oviedo, C/ Catedrático Valentín Andrés Álvarez s/n, 33006 Oviedo, Spain
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Lin Y, Song G, Ling H, Ge J, Ping W. Isolation of a high-ammonium-tolerant Monoraphidium sp. and evaluation of its potential for biodiesel production. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.11.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Santana-Sánchez A, Lynch F, Sirin S, Allahverdiyeva Y. Nordic cyanobacterial and algal lipids: Triacylglycerol accumulation, chemotaxonomy and bioindustrial potential. PHYSIOLOGIA PLANTARUM 2021; 173:591-602. [PMID: 33928648 DOI: 10.1111/ppl.13443] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The ability to capture and convert sunlight, water and nutrients into useful compounds make photosynthetic microbes ideal candidates for the bio-industrial factories of the future. However, the suitability of isolates from temperate regions to grow under Nordic conditions is questionable. In this work, we explore the chemotaxonomy of Nordic strains of cyanobacteria and one green alga and evaluate their potential as raw materials for the production of lipid-based bio-industrial compounds. Thin-layer chromatography was used to identify the presence of triacylglycerol, which were detected in the majority of strains. Fatty acid methyl ester profiles were analysed to determine the suitability of strains for the production of biodiesel or the production of polyunsaturated fatty acids for the nutraceutical industry. The Nordic Synechococcus strains were unique in demonstrating fatty acid profiles comprised mostly C14:0, C16:0 and C16:1 and lacking polyunsaturated fatty acids. These properties translated to superior predicted biodiesel qualities, including cetane number, cold filter plugging point and oxidative stability compared to the other evaluated strains. Polyunsaturated fatty acids were detected at high levels (38-53%), with Calothrix sp. 336/3 being abundant in two essential fatty acids, linoleic and alpha-linolenic acid (21 and 17%, respectively). Gamma-linoleic acid was the predominant polyunsaturated fatty acid for the remaining strains (13-21%). In addition to assessing the potential of Nordic strains for bio-industrial production, this work also discusses issues such as taxonomy and predictive modelling, which can affect the identification of prospective high-performing strains.
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Affiliation(s)
- Anita Santana-Sánchez
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Fiona Lynch
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Sema Sirin
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
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Olsen MFL, Pedersen JS, Thomsen ST, Martens HJ, Petersen A, Jensen PE. Outdoor cultivation of a novel isolate of the microalgae Scenedesmus sp. and the evaluation of its potential as a novel protein crop. PHYSIOLOGIA PLANTARUM 2021; 173:483-494. [PMID: 34427928 DOI: 10.1111/ppl.13532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 08/10/2021] [Indexed: 06/13/2023]
Abstract
A Danish strain of the green microalgae Scenedesmus sp. was isolated, identified and characterized with respect to productivity under outdoor cultivation conditions at northern latitudes. The algae were cultivated outdoors in Denmark in closed tubular photobioreactors using only sunlight, simple inorganic nutrients and under ambient temperatures. The biomass composition was evaluated in terms of protein content and quality. The average volumetric and areal biomass productivity obtained for the Scenedesmus sp. isolate during outdoor cultivation was 0.083 g dry matter L-1 and 6.40 g dm m-2 day-1 , respectively. Thus, productivities are comparable to data reported in the literature under similar conditions. A strain-specific nitrogen to protein conversion factor of 5.5 was determined for the Scenedesmus sp. strain enabling more accurate protein estimations from simple nitrogen determination methods like Kjeldahl analysis in the future. The protein content was determined to be 52.4% of dried biomass for this Scenedesmus strain. The sum of essential amino acids was 42% which is high compared to other microalgae. The results are compared and discussed in comparison to other microalgae and soybean as a common plant protein source.
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Affiliation(s)
| | | | - Sune Tjalfe Thomsen
- Department of Geosciences and Natural Resource Management, University of Copenhagen, Frederiksberg, Denmark
| | - Helle Jakobe Martens
- Department of Geosciences and Natural Resource Management, University of Copenhagen, Frederiksberg, Denmark
| | | | - Poul Erik Jensen
- Department of Food Science, University of Copenhagen, Frederiksberg, Denmark
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14
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Plöhn M, Spain O, Sirin S, Silva M, Escudero-Oñate C, Ferrando-Climent L, Allahverdiyeva Y, Funk C. Wastewater treatment by microalgae. PHYSIOLOGIA PLANTARUM 2021; 173:568-578. [PMID: 33860948 DOI: 10.1111/ppl.13427] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
The growth of the world's population increases the demand for fresh water, food, energy, and technology, which in turn leads to increasing amount of wastewater, produced both by domestic and industrial sources. These different wastewaters contain a wide variety of organic and inorganic compounds which can cause tremendous environmental problems if released untreated. Traditional treatment systems are usually expensive, energy demanding and are often still incapable of solving all challenges presented by the produced wastewaters. Microalgae are promising candidates for wastewater reclamation as they are capable of reducing the amount of nitrogen and phosphate as well as other toxic compounds including heavy metals or pharmaceuticals. Compared to the traditional systems, photosynthetic microalgae require less energy input since they use sunlight as their energy source, and at the same time lower the carbon footprint of the overall reclamation process. This mini-review focuses on recent advances in wastewater reclamation using microalgae. The most common microalgal strains used for this purpose are described as well as the challenges of using wastewater from different origins. We also describe the impact of climate with a particular focus on a Nordic climate.
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Affiliation(s)
- Martin Plöhn
- Department of Chemistry, Umeå University, Umeå, Sweden
| | - Olivia Spain
- Department of Chemistry, Umeå University, Umeå, Sweden
| | - Sema Sirin
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Mario Silva
- Institute for Energy Technology (IFE), Kjeller, Norway
| | | | | | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
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15
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Gao K, Liu Q, Gao Z, Xue C, Qian P, Dong J, Gao Z, Deng X. A dilution strategy used to enhance nutrient removal and biomass production of Chlorella sorokiniana in frigon wastewater. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102438] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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16
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Hong K, Beld J, Davis TD, Burkart MD, Palenik B. Screening and characterization of polyhydroxyalkanoate granules, and phylogenetic analysis of polyhydroxyalkanoate synthase gene PhaC in cyanobacteria. JOURNAL OF PHYCOLOGY 2021; 57:754-765. [PMID: 33350471 DOI: 10.1111/jpy.13123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 09/06/2020] [Accepted: 10/13/2020] [Indexed: 06/12/2023]
Abstract
Using Nile Red and BODIPY 493/503 dye-staining and fluorescence microscopy, twenty cyanobacterial strains, including ten commercially available strains and ten environmental isolates from estuaries, freshwater ponds, and lagoons, were screened for the accumulation of ecologically important and potentially biotechnologically significant carbon storage granules such as polyhydroxyalkanoates (PHA). Dye-staining granules were observed in six strains. Three Synechocystis, spp. strains WHSYN, LSNM, and CGF-1, and a Phormidium-like sp. CGFILA were isolated from environmental sources and found to produce granules of polyhydroxyalkanoate (PHA) according to PHA synthase gene (phaC) PCR screening and 1 H NMR analyses. The environmental isolate, Nodularia sp. Las Olas and commercially available Phormidium cf. iriguum CCALA 759 displayed granules but screened negative for PHA according to phaC PCR and 1 H NMR analyses. Partial polyhydroxyalkanoate synthase subunit C (phaC) and 16S rRNA gene sequences obtained from the PHA-accumulating strains and analyzed alongside publicly available phaC, phaE, 16S rRNA, and 23S rRNA data help in understanding the distribution and evolutionary history of PHA biosynthesis within the phylum Cyanobacteria. The data show that the presence of phaC is highly conserved within the genus Synechocystis, and present in at least one isolate of Phormidium. Maximum likelihood analyses and cophylogenetic modeling of PHA synthase gene sequences provide evidence of a recent horizontal gene transfer event between distant genera of cyanobacteria related to Pleurocapsa sp. PCC 7327 and Phormidium-like sp. CGFILA. These findings will help guide additional screening for PHA producers, and may explain why some Phormidium species produce PHAs, while others do not.
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Affiliation(s)
- Karl Hong
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, 92093-0202, USA
| | - Joris Beld
- Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, 92093-0202, USA
- Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA, 19102, USA
| | - Tony D Davis
- Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, 92093-0202, USA
| | - Michael D Burkart
- Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, 92093-0202, USA
| | - Brian Palenik
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, 92093-0202, USA
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17
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Salazar J, Valev D, Näkkilä J, Tyystjärvi E, Sirin S, Allahverdiyeva Y. Nutrient removal from hydroponic effluent by Nordic microalgae: From screening to a greenhouse photobioreactor operation. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102247] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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18
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Sero ET, Siziba N, Bunhu T, Shoko R. Isolation and screening of microalgal species, native to Zimbabwe, with potential use in biodiesel production. ALL LIFE 2021. [DOI: 10.1080/26895293.2021.1911862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
| | - Nqobizitha Siziba
- Department of Biology, Chinhoyi University of Technology, Chinhoyi, Zimbabwe
| | - Tavengwa Bunhu
- Department of Chemistry, Chinhoyi University of Technology, Chinhoyi, Zimbabwe
| | - Ryman Shoko
- Department of Biology, Chinhoyi University of Technology, Chinhoyi, Zimbabwe
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Wágner DS, Cazzaniga C, Steidl M, Dechesne A, Valverde-Pérez B, Plósz BG. Optimal influent N-to-P ratio for stable microalgal cultivation in water treatment and nutrient recovery. CHEMOSPHERE 2021; 262:127939. [PMID: 33182115 DOI: 10.1016/j.chemosphere.2020.127939] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/27/2020] [Accepted: 08/05/2020] [Indexed: 06/11/2023]
Abstract
Species specific nitrogen-to-phosphorus molar ratio (NPR) has been suggested for green microalgae. Algae can store nitrogen and phosphorus, suggesting that the optimum feed concentration dynamically changes as function of the nutrient storage. We assessed the effect of varying influent NPR on microalgal cultivation in terms of microbial community stability, effluent quality and biokinetics. Mixed green microalgae (Chlorella sorokiniana and Scenedesmus sp.) and a monoculture of Chlorella sp. were cultivated in continuous laboratory-scale reactors treating used water. An innovative image analysis tool, developed in this study, was used to track microbial community changes. Diatoms proliferated as influent NPR decreased, and were outcompeted once cultivation conditions were restored to the optimal NPR range. Low NPR operation resulted in decrease in phosphorus removal, biomass concentration and effluent nitrogen concentration. ASM-A kinetic model simulation results agreed well with operational data in the absence of diatoms. The failure to predict operational data in the presence of diatoms suggest differences in microbial activity that can significantly influence nutrient recovery in photobioreactors (PBR). No contamination occurred during Chlorella sp. monoculture cultivation with varying NPRs. Low NPR operation resulted in decrease in biomass concentration, effluent nitrogen concentration and nitrogen quota. The ASM-A model was calibrated for the monoculture and the simulations could predict the experimental data in continuous operation using a single parameter subset, suggesting stable biokinetics under the different NPR conditions. Results show that controlling the influent NPR is effective to maintain the algal community composition in PBR, thereby ensuring effective nutrients uptake.
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Affiliation(s)
- Dorottya S Wágner
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Building 115, 2800 Kgs, Lyngby, Denmark; Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220, Aalborg, Denmark.
| | - Clarissa Cazzaniga
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Building 115, 2800 Kgs, Lyngby, Denmark
| | - Michael Steidl
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Building 115, 2800 Kgs, Lyngby, Denmark
| | - Arnaud Dechesne
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Building 115, 2800 Kgs, Lyngby, Denmark
| | - Borja Valverde-Pérez
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Building 115, 2800 Kgs, Lyngby, Denmark.
| | - Benedek Gy Plósz
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Building 115, 2800 Kgs, Lyngby, Denmark; Department of Chemical Engineering, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
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20
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Oyebamiji OO, Boeing WJ, Holguin FO, Ilori O, Amund O. Green microalgae cultured in textile wastewater for biomass generation and biodetoxification of heavy metals and chromogenic substances. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100247] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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21
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Cheregi O, Ekendahl S, Engelbrektsson J, Strömberg N, Godhe A, Spetea C. Microalgae biotechnology in Nordic countries - the potential of local strains. PHYSIOLOGIA PLANTARUM 2019; 166:438-450. [PMID: 30809828 PMCID: PMC6850598 DOI: 10.1111/ppl.12951] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/25/2019] [Accepted: 02/25/2019] [Indexed: 05/03/2023]
Abstract
Climate change, energy use and food security are the main challenges that our society is facing nowadays. Biofuels and feedstock from microalgae can be part of the solution if high and continuous production is to be ensured. This could be attained in year-round, low cost, outdoor cultivation systems using strains that are not only champion producers of desired compounds but also have robust growth in a dynamic climate. Using microalgae strains adapted to the local conditions may be advantageous particularly in Nordic countries. Here, we review the current status of laboratory and outdoor-scale cultivation in Nordic conditions of local strains for biofuel, high-value compounds and water remediation. Strains suitable for biotechnological purposes were identified from the large and diverse pool represented by saline (NE Atlantic Ocean), brackish (Baltic Sea) and fresh water (lakes and rivers) sources. Energy-efficient annual rotation for cultivation of strains well adapted to Nordic climate has the potential to provide high biomass yields for biotechnological purposes.
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Affiliation(s)
- Otilia Cheregi
- Department of Biological and Environmental SciencesUniversity of GothenburgGothenburg 40530Sweden
| | - Susanne Ekendahl
- Department of Chemistry and MaterialsRISE Research Institutes of SwedenBorås 50115Sweden
| | - Johan Engelbrektsson
- Department of Chemistry and MaterialsRISE Research Institutes of SwedenBorås 50115Sweden
| | - Niklas Strömberg
- Department of Chemistry and MaterialsRISE Research Institutes of SwedenBorås 50115Sweden
| | - Anna Godhe
- Department of Marine SciencesUniversity of GothenburgGothenburg 40530Sweden
| | - Cornelia Spetea
- Department of Biological and Environmental SciencesUniversity of GothenburgGothenburg 40530Sweden
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22
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Perera IA, Abinandan S, Subashchandrabose SR, Venkateswarlu K, Naidu R, Megharaj M. Advances in the technologies for studying consortia of bacteria and cyanobacteria/microalgae in wastewaters. Crit Rev Biotechnol 2019; 39:709-731. [PMID: 30971144 DOI: 10.1080/07388551.2019.1597828] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The excessive generation and discharge of wastewaters have been serious concerns worldwide in the recent past. From an environmental friendly perspective, bacteria, cyanobacteria and microalgae, and the consortia have been largely considered for biological treatment of wastewaters. For efficient use of bacteria‒cyanobacteria/microalgae consortia in wastewater treatment, detailed knowledge on their structure, behavior and interaction is essential. In this direction, specific analytical tools and techniques play a significant role in studying these consortia. This review presents a critical perspective on physical, biochemical and molecular techniques such as microscopy, flow cytometry with cell sorting, nanoSIMS and omics approaches used for systematic investigations of the structure and function, particularly nutrient removal potential of bacteria‒cyanobacteria/microalgae consortia. In particular, the use of specific molecular techniques of genomics, transcriptomics, proteomics metabolomics and genetic engineering to develop more stable consortia of bacteria and cyanobacteria/microalgae with their improved biotechnological capabilities in wastewater treatment has been highlighted.
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Affiliation(s)
- Isiri Adhiwarie Perera
- a Global Centre for Environmental Remediation (GCER), Faculty of Science , The University of Newcastle , Callaghan , New South Wales , Australia
| | - Sudharsanam Abinandan
- a Global Centre for Environmental Remediation (GCER), Faculty of Science , The University of Newcastle , Callaghan , New South Wales , Australia
| | - Suresh R Subashchandrabose
- a Global Centre for Environmental Remediation (GCER), Faculty of Science , The University of Newcastle , Callaghan , New South Wales , Australia.,b Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE) , The University of Newcastle , Callaghan , New South Wales , Australia
| | - Kadiyala Venkateswarlu
- c Formerly Department of Microbiology , Sri Krishnadevaraya University , Anantapuramu , Andhra Pradesh , India
| | - Ravi Naidu
- a Global Centre for Environmental Remediation (GCER), Faculty of Science , The University of Newcastle , Callaghan , New South Wales , Australia.,b Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE) , The University of Newcastle , Callaghan , New South Wales , Australia
| | - Mallavarapu Megharaj
- a Global Centre for Environmental Remediation (GCER), Faculty of Science , The University of Newcastle , Callaghan , New South Wales , Australia.,b Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE) , The University of Newcastle , Callaghan , New South Wales , Australia
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23
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Luo L, Lin X, Zeng F, Luo S, Chen Z, Tian G. Performance of a novel photobioreactor for nutrient removal from piggery biogas slurry: Operation parameters, microbial diversity and nutrient recovery potential. BIORESOURCE TECHNOLOGY 2019; 272:421-432. [PMID: 30388580 DOI: 10.1016/j.biortech.2018.10.057] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 10/21/2018] [Accepted: 10/23/2018] [Indexed: 06/08/2023]
Abstract
Photobioreactor is deemed to be one of limiting factors for the commercial application of wastewater treatment based on microalgae cultivation. In this study, a novel Flat-Plate Continuous Open Photobioreactor (FPCO-PBR) was developed to treat piggery biogas slurry. The operation parameters, microbial stability and nutrient recovery potential of FPCO-PBR were investigated. Results showed that the appropriate influent mode for FPCO-PBR was multi-point or spraying mode. The optimal hydraulic retention time and interval time for biomass harvesting of FPCO-PBR were both 2 d. Nitrogen and phosphorus recovery rate were 30 mg L-1 d-1 and 7 mg L-1 d-1 respectively under optimal operating parameters. Microbial diversity remained relatively stable in FPCO-PBR. Biomass production rate of FPCO-PBR was 0.47 g L-1 d-1 under optimal operating parameters. The revenue generated from biomass was estimated to be 15.06 $ kg-1, which means that treating one ton of wastewater can generate $ 7.08 in revenue.
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Affiliation(s)
- Longzao Luo
- School of Chemistry and Environmental Science, Shangrao Normal University, Shangrao 334001, China; Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiaoai Lin
- College of Life Science, Shangrao Normal University, Shangrao 334001, China
| | - Fanjian Zeng
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Shuang Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Zongbao Chen
- School of Chemistry and Environmental Science, Shangrao Normal University, Shangrao 334001, China
| | - Guangming Tian
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
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24
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Temperature effects on growth rates and fatty acid content in freshwater algae and cyanobacteria. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.09.018] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Zhu J, Yu Z, He L, Cao X, Liu S, Song X. Molecular Mechanism of Modified Clay Controlling the Brown Tide Organism Aureococcus anophagefferens Revealed by Transcriptome Analysis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:7006-7014. [PMID: 29768919 DOI: 10.1021/acs.est.7b05172] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The data and experiences in mitigating harmful algal blooms (HABs) by modified clay (MC) show that a bloom does not continue after the dispersal of the MC, even though the density of the residual cells in the water is still high, at 20-30% of the initial cell density. This interesting phenomenon indicates that in addition to flocculation, MC has an additional control mechanism. Here, transcriptome sequencing technology was used to study the molecular mechanism of MC in controlling HABs. In residual cells treated with MC, the photosynthetic light reaction was the most affected physiological process. Some genes related to the light harvesting complex, photosystem (PS) I and PS II, were significantly up-regulated ( p < 0.05), and several transcripts increased by as much as 6-fold. In contrast, genes associated with the dark reaction did not significantly change. In addition to genes associated with photosynthesis, numerous genes related to energy metabolism, stress adaptation, cytoskeletal functioning, and cell division also responded to MC treatment. These results indicated that following treatment with MC, the normal physiological processes of algal cells were disrupted, which inhibited cell proliferation and growth. Thus, these findings provide scientific proof that HABs are controlled by MC.
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Affiliation(s)
- Jianan Zhu
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology , Chinese Academy of Sciences , Qingdao 266071 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Zhiming Yu
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology , Chinese Academy of Sciences , Qingdao 266071 , China
- Functional Laboratory of Marine Ecology and Environmental Science , Qingdao National Laboratory for Marine Science and Technology , Qingdao 266237 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Liyan He
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology , Chinese Academy of Sciences , Qingdao 266071 , China
- Functional Laboratory of Marine Ecology and Environmental Science , Qingdao National Laboratory for Marine Science and Technology , Qingdao 266237 , China
| | - Xihua Cao
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology , Chinese Academy of Sciences , Qingdao 266071 , China
- Functional Laboratory of Marine Ecology and Environmental Science , Qingdao National Laboratory for Marine Science and Technology , Qingdao 266237 , China
| | - Shuya Liu
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology , Chinese Academy of Sciences , Qingdao 266071 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xiuxian Song
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology , Chinese Academy of Sciences , Qingdao 266071 , China
- Functional Laboratory of Marine Ecology and Environmental Science , Qingdao National Laboratory for Marine Science and Technology , Qingdao 266237 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
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26
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Hughes AR, Sulesky A, Andersson B, Peers G. Sulfate amendment improves the growth and bioremediation capacity of a cyanobacteria cultured on municipal wastewater centrate. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Pennesi C, Danovaro R. Assessing marine environmental status through microphytobenthos assemblages colonizing the Autonomous Reef Monitoring Structures (ARMS) and their potential in coastal marine restoration. MARINE POLLUTION BULLETIN 2017; 125:56-65. [PMID: 28784269 DOI: 10.1016/j.marpolbul.2017.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 07/17/2017] [Accepted: 08/01/2017] [Indexed: 06/07/2023]
Abstract
Microphytobenthos is potentially highly sensitive to environmental alterations, but has been rarely utilized in monitoring studies. Here we investigated the use of microphytobenthos colonizing Autonomous Reef Monitoring Structures (ARMS) to assess the marine environmental quality. We analysed microphytobenthic assemblages in terms of abundance, biomass and species composition on ARMS deployed in northern Adriatic Sea along a gradient of increasing impacts. We show that microphytobenthic variables changed significantly across sites, with lowest abundance and biodiversity in the highly impacted site. Moreover, the specific analysis of Diatoms revealed that genera like Entomoneis and Cylindrotheca could be used as indicators of nutrient enriched and stressed conditions. We provide evidence that the analysis of microphytobenthos colonizing artificial substrates could be used as a tool for detecting altered environmental characteristics. We also show that the ARMS, recreating hot spots of microphytobenthic biodiversity, and protect them from grazing, could be potentially utilized to restore degraded hard substrates. Our result indicates that microphytobenthos can be easily incorporated in future monitoring and restoration programmes to assess and improve marine environmental health.
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Affiliation(s)
- Chiara Pennesi
- Department of Life and Environmental Sciences, Polytechnic University of Marche, via Brecce Bianche, 60131 Ancona, Italy.
| | - Roberto Danovaro
- Department of Life and Environmental Sciences, Polytechnic University of Marche, via Brecce Bianche, 60131 Ancona, Italy; Stazione Zoologica Anton Dohrn, Naples, Italy
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28
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Jämsä M, Lynch F, Santana-Sánchez A, Laaksonen P, Zaitsev G, Solovchenko A, Allahverdiyeva Y. Nutrient removal and biodiesel feedstock potential of green alga UHCC00027 grown in municipal wastewater under Nordic conditions. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.06.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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29
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Characterization of Seven Species of Cyanobacteria for High-Quality Biomass Production. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2017. [DOI: 10.1007/s13369-017-2666-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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30
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Microalgal Cultivation in Secondary Effluent: Recent Developments and Future Work. Int J Mol Sci 2017; 18:ijms18010079. [PMID: 28045437 PMCID: PMC5297713 DOI: 10.3390/ijms18010079] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 12/28/2016] [Indexed: 11/17/2022] Open
Abstract
Eutrophication of water catchments and the greenhouse effect are major challenges in developing the global economy in the near future. Secondary effluents, containing high amounts of nitrogen and phosphorus, need further treatment before being discharged into receiving water bodies. At the same time, new environmentally friendly energy sources need to be developed. Integrating microalgal cultivation for the production of biodiesel feedstock with the treatment of secondary effluent is one way of addressing both issues. This article provides a comprehensive review of the latest progress in microalgal cultivation in secondary effluent to remove pollutants and accumulate lipids. Researchers have discovered that microalgae remove nitrogen and phosphorus effectively from secondary effluent, accumulating biomass and lipids in the process. Immobilization of appropriate microalgae, and establishing a consortium of microalgae and/or bacteria, were both found to be feasible ways to enhance pollutant removal and lipid production. Demonstrations of pilot-scale microalgal cultures in secondary effluent have also taken place. However there is still much work to be done in improving pollutants removal, biomass production, and lipid accumulation in secondary effluent. This includes screening microalgae, constructing the consortium, making use of flue gas and nitrogen, developing technologies related to microalgal harvesting, and using lipid-extracted algal residues (LEA).
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31
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Matuszyńska A, Angeleri M, Riseley A, Ramos-Martinez EM, Guerra T, Moejes FW. A Young Algaeneers' perspective: Communication and networking are key to successful multidisciplinary research. ALGAL RES 2017. [DOI: 10.1016/j.algal.2016.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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The Diatom Staurosirella pinnata for Photoactive Material Production. PLoS One 2016; 11:e0165571. [PMID: 27828985 PMCID: PMC5102471 DOI: 10.1371/journal.pone.0165571] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 10/13/2016] [Indexed: 11/19/2022] Open
Abstract
A native isolate of the colonial benthic diatom Staurosirella pinnata was cultivated for biosilica production. The silicified cell walls (frustules) were used as a source of homogeneous and structurally predictable porous biosilica for dye trapping and random laser applications. This was coupled with the extraction of lipids from biomass showing potential to fabricate photoactive composite materials sustainably. The strain was selected for its ease of growth in culture and harvesting. Biosilica and lipids were obtained at the end of growth in indoor photobioreactors. Frustules were structurally characterized microscopically and their chemistry analyzed with Fourier Transform Infrared Spectroscopy. Frustule capacity of binding laser dyes was evaluated on a set of frustules/Rhodamine B (Rho B) solutions and with respect to silicon dioxide and diatomite by Fluorescence Spectroscopy demonstrating a high affinity for the organic dye. The effect of dye trapping property in conveying Rho B emission to frustules, with enhancement of scattering events, was analyzed on Rho B doped polyacrylamide gels filled or not with frustules. Amplified spontaneous emission was recorded at increasing pump power indicating the onset of a random laser effect in frustule filled gels at lower power threshold compared to unfilled matrices.
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