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Matthay P, Schalck T, Simoens K, Kerstens D, Sels B, Verstraeten N, Bernaerts K, Michiels J. In silico identification of gene targets to enhance C12 fatty acid production in Escherichia coli. Appl Microbiol Biotechnol 2025; 109:116. [PMID: 40341454 PMCID: PMC12062052 DOI: 10.1007/s00253-025-13501-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2024] [Revised: 04/24/2025] [Accepted: 04/25/2025] [Indexed: 05/10/2025]
Abstract
The global interest in fatty acids is steadily rising due to their wealth of industrial potential ranging from cosmetics to biofuels. Unfortunately, certain fatty acids, such as monounsaturated lauric acid with a carbon atom chain length of twelve (C12 fatty acids), cannot be produced cost and energy-efficiently using conventional methods. Biosynthesis using microorganisms can overcome this drawback. However, rewiring a microbe's metabolome for increased production remains challenging. To overcome this, sophisticated genome-wide metabolic network models have become available. These models predict the effect of genetic perturbations on the metabolism, thereby serving as a guide for metabolic pathways optimization. In this work, we used constraint-based modeling in combination with the algorithm Optknock to identify gene deletions in Escherichia coli that improve C12 fatty acid production. Nine gene targets were identified that, when deleted, were predicted to increase C12 fatty acid titers. Targets play a role in anaplerotic reactions, amino acid synthesis, carbon metabolism, and cofactor-balancing. Subsequently, we constructed the corresponding (combinatorial) deletion mutants to validate the in silico predictions in vivo. Our highest producer (ΔmaeB Δndk ΔpykA) reaches a titer of 6.7 mg/L, corresponding to a 7.5-fold increase in C12 fatty acid production. This study demonstrates that model-guided metabolic engineering is a useful tool to improve C12 fatty acid production. KEY POINTS: •Escherichia coli as a promising biofactory for unsaturated C12 fatty acids. •Optknock to identify non-obvious gene deletions for increased C12 fatty acids. •7.5-fold higher C12 fatty acid production achieved by deleting maeB, ndk, and pykA.
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Affiliation(s)
- Paul Matthay
- VIB-KU Leuven Center for Microbiology, Kasteelpark Arenberg 20, 3001, Louvain, Belgium
- KU Leuven Centre of Microbial and Plant Genetics, Kasteelpark Arenberg 20, 3001, Louvain, Belgium
| | - Thomas Schalck
- VIB-KU Leuven Center for Microbiology, Kasteelpark Arenberg 20, 3001, Louvain, Belgium
- KU Leuven Centre of Microbial and Plant Genetics, Kasteelpark Arenberg 20, 3001, Louvain, Belgium
| | - Kenneth Simoens
- Chemical and Biochemical Reactor Engineering and Safety Section, Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200 F, 3001, Louvain, Belgium
| | - Dorien Kerstens
- KU Leuven Center for Sustainable Catalysis and Engineering, Celestijnenlaan 200 F, 3001, Louvain, Belgium
| | - Bert Sels
- KU Leuven Center for Sustainable Catalysis and Engineering, Celestijnenlaan 200 F, 3001, Louvain, Belgium
| | - Natalie Verstraeten
- VIB-KU Leuven Center for Microbiology, Kasteelpark Arenberg 20, 3001, Louvain, Belgium
- KU Leuven Centre of Microbial and Plant Genetics, Kasteelpark Arenberg 20, 3001, Louvain, Belgium
| | - Kristel Bernaerts
- Chemical and Biochemical Reactor Engineering and Safety Section, Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200 F, 3001, Louvain, Belgium
| | - Jan Michiels
- VIB-KU Leuven Center for Microbiology, Kasteelpark Arenberg 20, 3001, Louvain, Belgium.
- KU Leuven Centre of Microbial and Plant Genetics, Kasteelpark Arenberg 20, 3001, Louvain, Belgium.
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2
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Haider MN, O'Higgins L, O'Shea R, Archer L, Wall DM, Verma N, Rodero MDR, Mehmood MA, Murphy JD, Bose A. Selecting optimal algal strains for robust photosynthetic upgrading of biogas under temperate oceanic climates. Biotechnol Adv 2025; 82:108581. [PMID: 40258525 DOI: 10.1016/j.biotechadv.2025.108581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2024] [Revised: 03/20/2025] [Accepted: 04/14/2025] [Indexed: 04/23/2025]
Abstract
Biogas generated from anaerobic digestion can be upgraded to biomethane by photosynthetic biogas upgrading, using CO2 as a bioresource for algal (cyanobacteria and microalgae) cultivation. This allows the upgrading technology to offer economic and environmental benefits to conventional physiochemical upgrading techniques (which can be energy-intensive and costly) by co-generating biomethane with high-value biomass. However, a critical challenge in implementing this technology in temperate oceanic climatic conditions (as found in Japan, and the northwest coasts of Europe and of North America, with average temperatures ranging between 5 and 20 °C) is the selection of algal strains that must be capable of sustained growth under lower ambient temperatures. Accordingly, this paper investigated the selection of algae that met seven key criteria: optimal growth at high pH (9-11); at alkalinity of 1.5-2.5 g inorganic carbon per litre; operation at low temperature (5-20 °C); tolerance to high CO2 concentrations (above 20 %); capability for mixotrophic cultivation; ability to accumulate high-value metabolites such as photosynthetic pigments and bioactive fatty acids; and ease of harvesting. Of the twenty-six algal species assessed and ranked using a Pugh Matrix, Anabaena sp. and Phormidium sp. were assessed as the most favourable species, followed by Oscillatoria sp., Spirulina subsalsa, and Leptolyngbya sp. Adaptive laboratory evolution together with manipulation of abiotic factors could be effectively utilised to increase the efficiency and economic feasibility of the use of the selected strain in a photosynthetic biogas upgrading system, through improvement of growth and yield of high-value compounds.
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Affiliation(s)
- Muhammad Nabeel Haider
- MaREI Centre for energy, climate and marine, Environmental Research Institute, University College Cork, Cork T23 XE10, Ireland; School of Engineering and Architecture, University College Cork, Ireland
| | - Linda O'Higgins
- MaREI Centre for energy, climate and marine, Environmental Research Institute, University College Cork, Cork T23 XE10, Ireland
| | - Richard O'Shea
- MaREI Centre for energy, climate and marine, Environmental Research Institute, University College Cork, Cork T23 XE10, Ireland; School of Engineering and Architecture, University College Cork, Ireland
| | - Lorraine Archer
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK
| | - David M Wall
- MaREI Centre for energy, climate and marine, Environmental Research Institute, University College Cork, Cork T23 XE10, Ireland; School of Engineering and Architecture, University College Cork, Ireland
| | - Nikita Verma
- MaREI Centre for energy, climate and marine, Environmental Research Institute, University College Cork, Cork T23 XE10, Ireland; School of Engineering and Architecture, University College Cork, Ireland
| | - María Del Rosario Rodero
- Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n., Valladolid 47011, Spain
| | - Muhammad Aamer Mehmood
- Bioenergy Research Center, Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Jerry D Murphy
- MaREI Centre for energy, climate and marine, Environmental Research Institute, University College Cork, Cork T23 XE10, Ireland; School of Engineering and Architecture, University College Cork, Ireland
| | - Archishman Bose
- MaREI Centre for energy, climate and marine, Environmental Research Institute, University College Cork, Cork T23 XE10, Ireland; School of Engineering and Architecture, University College Cork, Ireland.
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3
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Wang M, Wu Y, Du J, Yang Y, Sun J, Li Z, Xiao J, Meng L, Xu X, Zhong K. Spatiotemporal evolution of temperature extremes onset times and their association with atmospheric circulations in the Poyang Lake basin, China. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2025:10.1007/s00484-025-02902-x. [PMID: 40152968 DOI: 10.1007/s00484-025-02902-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 09/02/2024] [Revised: 03/14/2025] [Accepted: 03/19/2025] [Indexed: 03/30/2025]
Abstract
The frequency and intensity variations of temperature extremes have received great attention in recent years. However, limited information is available on the variations in temperature extremes onset times. In this paper, we defined a set of evaluation indexes to quantify the onset times of temperature extremes. The spatiotemporal evolution of the onset times of temperature extremes in the Poyang Lake basin, China, was analyzed using daily temperature data from 87 meteorological stations in the area, covering the 1960-2022 period. The association between the onset times of temperature extremes and atmospheric circulations was further investigated in this study. We found that: (1) The onset times of all cold temperature events displayed a significant delaying trend (P < 0.01), while the onset times of all warm temperature events displayed a significant advancing trend (P < 0.05). (2) The variations in the onset times of temperature extremes were associated with atmospheric circulations. The Western Pacific Subtropical High-Intensity Index (WPSHI) and the Northern Hemisphere Subtropical High Area Index (NHSHAI) both correlated significantly negatively with the hot day onset date (SD30) (P < 0.01); the Arctic Oscillation (AO) showed significant positive and negative correlations with the frost onset date (SD0) (P < 0.05) and the warm season onset date (SD5) (P < 0.05), respectively. This study provides insights into the occurrence of extreme temperature events in the Poyang Lake basin, as well as useful references for implementing effective measures to reduce associated impacts.
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Affiliation(s)
- Mei Wang
- School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Yan Wu
- School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Juan Du
- School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Yawen Yang
- School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Jinxing Sun
- School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Zexiang Li
- School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Juan Xiao
- School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Lihong Meng
- School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Xiangming Xu
- School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, 341000, China
| | - Keyuan Zhong
- School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, 341000, China.
- Key Laboratory of Hydrometeorological Disaster Mechanism and Warning of Ministry of Water Resources, Nanjing University of Information, Science &Technology, Nanjing, China.
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4
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Lu Q, Li H, Liu H, Xu Z, Saikaly PE, Zhang W. A fast microbial nitrogen-assimilation technology enhances nitrogen migration and single-cell-protein production in high-ammonia piggery wastewater. ENVIRONMENTAL RESEARCH 2024; 257:119329. [PMID: 38851372 DOI: 10.1016/j.envres.2024.119329] [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: 03/05/2024] [Revised: 05/28/2024] [Accepted: 06/01/2024] [Indexed: 06/10/2024]
Abstract
Conventional methods, such as freshwater dilution and ammonia stripping, have been widely employed for microalgae-based piggery wastewater (PW) treatment, but they cause high freshwater consumption and intensive ammonia loss, respectively. This present work developed a novel fast microbial nitrogen-assimilation technology by integrating nitrogen starvation, zeolite-based adsorption, pH control, and co-culture of microalgae-yeast for the PW treatment. Among them, the nitrogen starvation accelerated the nitrogen removal and shortened the treatment period, but it could not improve the tolerance level of microalgal cells to ammonia toxicity based on oxidative stress. Therefore, zeolite was added to reduce the initial total ammonia-nitrogen concentration to around 300 mg/L by ammonia adsorption. Slowly releasing ammonia at the later phase maintained the total ammonia-nitrogen concentration in the PW. However, the pH increase could cause lots of ammonia loss air and pollution and inhibit the desorption of ammonia from zeolite and the growth and metabolism of microalgae during the microalgae cultivation. Thus, the highest biomass yield (3.25 g/L) and nitrogen recovery ratio (40.31%) were achieved when the pH of PW was controlled at 6.0. After combining the co-cultivation of microalgae-yeast, the carbon-nitrogen co-assimilation and the alleviation of pH fluctuation further enhanced the nutrient removal and nitrogen migration to high-protein biomass. Consequently, the fast microbial nitrogen-assimilation technology can help update the industrial system for high-ammonia wastewater treatment by improving the treatment and nitrogen recovery rates.
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Affiliation(s)
- Qian Lu
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, 212100, China
| | - Huankai Li
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China; Department of Chemistry, Hong Kong Baptist University, Hong Kong SAR, 999077, China.
| | - Hui Liu
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China.
| | - Zhimin Xu
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Pascal E Saikaly
- Water Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Wenxiang Zhang
- Guangdong Basic Research Center of Excellence for Ecological Security and Green Development, Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China.
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5
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Khodadadianzaghmari F, Jahadi M, Goli M. Biochemical profile of Scenedesmus isolates, with a main focus on the fatty acid profile. Food Sci Nutr 2024; 12:5922-5931. [PMID: 39139969 PMCID: PMC11317656 DOI: 10.1002/fsn3.4254] [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: 12/06/2023] [Revised: 05/18/2024] [Accepted: 05/20/2024] [Indexed: 08/15/2024] Open
Abstract
Biochemical characterization of new microalgal strains that are isolated from diverse environmental conditions is an important starting point for the establishment of high-quality feedstock for nutraceutical and pharmaceutical applications. In this research study, the biochemical composition of three Iranian native subspecies of Scenedesmus microalgae (Scenedesmus obliquus, Scenedesmus bijugusi, and Scenedesmus sp.), with the main focus on fatty acid composition, was studied. The results showed that the strain Scenedesmus bijugusi had the highest biomass productivity (48 g/L/d), biomass (0.73%), carbohydrate (13.97%), fat (16.27%), protein (44.04%), chlorophyll-a (6.32 mg/g), and carotenoids (3.7 mg/g). The lipid profile also revealed that S. obliquus had the highest percentage of polyunsaturated fatty acid (46.52%), ratio of ∑n-3/∑n-6 (5.96), ratio of polyunsaturated fatty acid to saturated fatty acid (PUFA/SAF) (1.18), α-linolenic acid (22.74%), hypocholesterolemia index (1.61), and low atherogenic index (0.34). S. bijugusi and S. obliquus, thus, showed a great promise in nutraceutical and pharmaceutical applications due to their appropriate high productivity, biopigment, protein, lipid, antioxidant activity, long-chain polyunsaturated fatty acids, and α-linolenic acid.
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Affiliation(s)
- Faezeh Khodadadianzaghmari
- Department of Food Science and Technology, Faculty of Agriculture, Isfahan (Khorasgan) BranchIslamic Azad UniversityIsfahanIran
| | - Mahshid Jahadi
- Department of Food Science and Technology, Faculty of Agriculture, Isfahan (Khorasgan) BranchIslamic Azad UniversityIsfahanIran
| | - Mohammad Goli
- Department of Food Science and Technology, Laser and Biophotonics in Biotechnologies Research Center, Isfahan (Khorasgan) BranchIslamic Azad UniversityIsfahanIran
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6
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Song X, Kong F, Liu BF, Song Q, Ren NQ, Ren HY. Combined transcriptomic and metabolomic analyses of temperature response of microalgae using waste activated sludge extracts for promising biodiesel production. WATER RESEARCH 2024; 251:121120. [PMID: 38237459 DOI: 10.1016/j.watres.2024.121120] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 12/05/2023] [Accepted: 01/07/2024] [Indexed: 02/12/2024]
Abstract
Waste activated sludge (WAS) as one of the major pollutants with a significant annual production, has garnered significant attention regarding its treatment and utilization. If improperly discharged, it not only caused environmental pollution but also led to the wastage of valuable resources. In this study, the microalgae growth and lipid accumulation using waste activated sludge extracts (WASE) under different temperature conditions were investigated. The highest lipid content (59.13%) and lipid productivity (80.41 mg L-1 d-1) were obtained at cultivation temperatures of 10 and 25 °C, respectively. It was found that microalgae can effectively utilize TN/TP/NH4+-N and other nutrients of WASE. The highest utilization rates of TP, TN and NH4+-N were achieved at a cultivation temperature of 10 °C, reaching 84.97, 77.49 and 92.32%, respectively. The algal fatty acids had carbon chains predominantly ranging from C14 to C18, making them suitable for biodiesel production. Additionally, a comprehensive analysis of transcriptomics and metabolomics revealed up-regulation of genes associated with triglyceride assembly, the antioxidant system of algal cells, and cellular autophagy, as well as the accumulation of metabolites related to the tricarboxylic acid (TCA) cycle and lipids. This study offers novel insights into the microscopic mechanisms of microalgae culture using WASE and approaches for the resource utilization of sludge.
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Affiliation(s)
- Xueting Song
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Fanying Kong
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
| | - Bing-Feng Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Qingqing Song
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
| | - Hong-Yu Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China.
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O'Neill EA, Rowan NJ. Potential disruptive effects of zoosporic parasites on peatland-based organic freshwater aquaculture: Case study from the Republic of Ireland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 868:161495. [PMID: 36634789 DOI: 10.1016/j.scitotenv.2023.161495] [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: 10/21/2022] [Revised: 01/05/2023] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
Irish freshwater aquaculture holds great potential for aiding food security. However, its necessary expansion has been hampered by the adoption of important environmental EU directives. A novel peatland-based recirculating aquaculture multi-trophic pond system (RAMPS) was developed to assess its potential to assist in the sustainable development of industry whilst remaining aligned with environmental protection by adhering to organic aquaculture practices. Microalgae play a pivotal role in the farms' wastewater bioremediation. However, a collapse of the algal population within the system towards the end of the pilot study was observed. No relationship between physicochemical fluctuations and the collapse were indicated. Further investigations into the potential presence of biological agents were then conducted and fourteen species of zoosporic parasites from five different genera (Labyrinthula, Vampyrella, Amoeboaphelidium, Paraphelidium and Aphelidium) were identified after conducting next-generation sequencing (MinION). The presence of these species indicated the potential cause of algal collapse. Additionally, changes in weather conditions may have also contributed to the issue. Given the lack of data available on zoosporic parasites and their potential impact on organic aquaculture practices, additional research needs to be conducted. Developing a means to monitor and mitigate against these complex zoosporic parasites will inform food security, it will particularly help safeguard "organic" freshwater aquaculture where there is a reliance on using natural-based approaches to address disease mitigation. This information will in turn inform the replication of this RAMPs system in peatlands internationally creating local employment in green technologies, as communities' transition away from burning peat as fossil fuel. Also, zoosporic parasites may reduce important microalgae in peatland-based culture ponds that serve as exceptional sequesters of carbon. Findings of this study will inform related research that focus on the emergence of microbial pathogens in local aquatic ecosystems brought on by variances in climate.
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Affiliation(s)
- Emer A O'Neill
- Centre for Sustainable Disinfection and Sustainability, Bioscience Research Institute, Technological University of the Shannon: Midlands Midwest, Athlone Campus, University Road, Athlone, Co. Westmeath, Ireland; Faculty of Science & Health, Technological University of the Shannon: Midlands Midwest, Athlone Campus, University Road, Athlone, Co. Westmeath, Ireland.
| | - Neil J Rowan
- Centre for Sustainable Disinfection and Sustainability, Bioscience Research Institute, Technological University of the Shannon: Midlands Midwest, Athlone Campus, University Road, Athlone, Co. Westmeath, Ireland; Faculty of Science & Health, Technological University of the Shannon: Midlands Midwest, Athlone Campus, University Road, Athlone, Co. Westmeath, Ireland
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8
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O'Neill EA, Fehrenbach G, Murphy E, Alencar SA, Pogue R, Rowan NJ. Use of next generation sequencing and bioinformatics for profiling freshwater eukaryotic microalgae in a novel peatland integrated multi-trophic aquaculture (IMTA) system: Case study from the Republic of Ireland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:158392. [PMID: 36055498 DOI: 10.1016/j.scitotenv.2022.158392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 08/25/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
Development of integrated multi-trophic aquaculture (IMTA) systems constitutes a step change in the sustainable production of freshwater fish to meet emerging needs for high-protein foods globally. Recently, there has been a paradigm shift away from harvesting peat as a fuel towards the development of wettable peatland innovation (termed 'paludiculture'), such as aquaculture. Such eco-innovations support carbon sequestration and align with a balanced environmental approach to protecting biodiversity. This novel peatland-based IMTA process in the Irish midlands relies upon natural microalgae for waste treatment, recirculation and water quality where there is no use of pesticides or antibiotics. This novel IMTA system is powered with a wind turbine and the process has 'organic status'; moreover, it does not discharge aquaculture effluent to receiving water. However, there is a significant lack of understanding as to diversity of microalgae in this 'paludiculture'-based IMTA processes. This constitutes the first case study to use conventional microscopy combined with next-generation sequencing and bioinformatics to profile microalgae occurring in this novel IMTA system from pooled samples over a 12 month period in 2020. Conventional microscopy combined with classic identification revealed twenty genera of algae; with Chlorophyta and Charophyta being the most common present. However, algal DNA isolation, 16 s sequencing and bioinformatics revealed a combined total of 982 species from 341 genera across nine phyla from the same IMTA system, which emphasized a significant underestimation in the number and diversity of beneficial or potentially harmful algae in the IMTA-microbiome. These new methods also yield rich data that can be used by digital technologies to transform future monitoring and performance of the IMTA system for sustainability. The findings of this study align with many sustainability development goals of the United Nations including no poverty, zero hunger, good health and well-being, responsible consumption and production, climate change, and life below water.
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Affiliation(s)
- Emer A O'Neill
- Bioscience Research Institute, Technological University of the Shannon: Midlands Midwest, University Road, Athlone, Co. Westmeath, Ireland.
| | - Gustavo Fehrenbach
- Bioscience Research Institute, Technological University of the Shannon: Midlands Midwest, University Road, Athlone, Co. Westmeath, Ireland
| | - Emma Murphy
- Bioscience Research Institute, Technological University of the Shannon: Midlands Midwest, University Road, Athlone, Co. Westmeath, Ireland
| | - Sérgio A Alencar
- Universidade Católica de Brasilia, QS 7 LOTE 1 - Taguatinga, Brasília, DF 71966-700, Brazil
| | - Robert Pogue
- Bioscience Research Institute, Technological University of the Shannon: Midlands Midwest, University Road, Athlone, Co. Westmeath, Ireland; Universidade Católica de Brasilia, QS 7 LOTE 1 - Taguatinga, Brasília, DF 71966-700, Brazil
| | - Neil J Rowan
- Bioscience Research Institute, Technological University of the Shannon: Midlands Midwest, University Road, Athlone, Co. Westmeath, Ireland
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9
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Idenyi JN, Eya JC, Nwankwegu AS, Nwoba EG. Aquaculture sustainability through alternative dietary ingredients: Microalgal value-added products. ENGINEERING MICROBIOLOGY 2022; 2:100049. [PMID: 39628701 PMCID: PMC11611001 DOI: 10.1016/j.engmic.2022.100049] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/18/2022] [Accepted: 09/18/2022] [Indexed: 12/06/2024]
Abstract
Aquaculture contributes remarkably to the global economy and food security through seafood production, an important part of the global food supply chain. The success of this industry depends heavily on aquafeeds, and the nutritional composition of the feed is an important factor for the quality, productivity, and profitability of aquaculture species. The sustainability of the aquaculture industry depends on the accessibility of quality feed ingredients, such as fishmeal and fish oil. These traditional feedstuffs are under increasing significant pressure due to the rapid expansion of aquaculture for human consumption and the decline of natural fish harvest. In this review, we evaluated the development of microalgal molecules in aquaculture and expanded the use of these high-value compounds in the production of aquaculture diets. Microalgae-derived functional ingredients emerged as one of the promising alternatives for aquafeed production with positive health benefits. Several compounds found in microalgae, including carotenoids (lutein, astaxanthin, and β-carotene), essential amino acids (leucine, valine, and threonine), β-1-3-glucan, essential oils (docosahexaenoic acid and eicosapentaenoic acid), minerals, and vitamins, are of high nutritional value to aquaculture.
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Affiliation(s)
- John N. Idenyi
- Department of Biology/Gus R. Douglass Institute, West Virginia State University, Institute, WV 25112, USA
- Department of Biotechnology, Ebonyi State University, P.M.B, 053, Abakaliki, Nigeria
| | - Jonathan C. Eya
- Department of Biology/Gus R. Douglass Institute, West Virginia State University, Institute, WV 25112, USA
| | - Amechi S. Nwankwegu
- College of Resources and Environment, Southwest University, 1 Tiansheng Road, Beibei District, Chongqing 400716, China
| | - Emeka G. Nwoba
- Algae R&D Centre, Environmental and Conservation Sciences, Murdoch University, 90 South Street, Murdoch, Western Australia 6150, Australia
- Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, 90 South Street, Murdoch, Western Australia 6150, Australia
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10
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Munir N, Hasnain M, Sarwar Z, Ali F, Hessini K, Abideen Z. Changes in environmental conditions are critical factors for optimum biomass, lipid pattern and biodiesel production in algal biomass. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-022-01191-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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Ren X, Liu Y, Fan C, Hong H, Wu W, Zhang W, Wang Y. Production, Processing, and Protection of Microalgal n-3 PUFA-Rich Oil. Foods 2022; 11:foods11091215. [PMID: 35563938 PMCID: PMC9101592 DOI: 10.3390/foods11091215] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/15/2022] [Accepted: 04/19/2022] [Indexed: 02/01/2023] Open
Abstract
Microalgae have been increasingly considered as a sustainable “biofactory” with huge potentials to fill up the current and future shortages of food and nutrition. They have become an economically and technologically viable solution to produce a great diversity of high-value bioactive compounds, including n-3 polyunsaturated fatty acids (PUFA). The n-3 PUFA, especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), possess an array of biological activities and positively affect a number of diseases, including cardiovascular and neurodegenerative disorders. As such, the global market of n-3 PUFA has been increasing at a fast pace in the past two decades. Nowadays, the supply of n-3 PUFA is facing serious challenges as a result of global warming and maximal/over marine fisheries catches. Although increasing rapidly in recent years, aquaculture as an alternative source of n-3 PUFA appears insufficient to meet the fast increase in consumption and market demand. Therefore, the cultivation of microalgae stands out as a potential solution to meet the shortages of the n-3 PUFA market and provides unique fatty acids for the special groups of the population. This review focuses on the biosynthesis pathways and recombinant engineering approaches that can be used to enhance the production of n-3 PUFA, the impact of environmental conditions in heterotrophic cultivation on n-3 PUFA production, and the technologies that have been applied in the food industry to extract and purify oil in microalgae and protect n-3 PUFA from oxidation.
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Affiliation(s)
- Xiang Ren
- INNOBIO Corporation Limited, No. 49, DDA, Dalian 116600, China; (Y.L.); (C.F.); (H.H.); (W.W.)
- Correspondence: (X.R.); (Y.W.); Tel.: +86-411-65864645 (X.R.); +1-902-566-7953 (Y.W.)
| | - Yanjun Liu
- INNOBIO Corporation Limited, No. 49, DDA, Dalian 116600, China; (Y.L.); (C.F.); (H.H.); (W.W.)
| | - Chao Fan
- INNOBIO Corporation Limited, No. 49, DDA, Dalian 116600, China; (Y.L.); (C.F.); (H.H.); (W.W.)
| | - Hao Hong
- INNOBIO Corporation Limited, No. 49, DDA, Dalian 116600, China; (Y.L.); (C.F.); (H.H.); (W.W.)
| | - Wenzhong Wu
- INNOBIO Corporation Limited, No. 49, DDA, Dalian 116600, China; (Y.L.); (C.F.); (H.H.); (W.W.)
| | - Wei Zhang
- DeOxiTech Consulting, 30 Cloverfield Court, Dartmouth, NS B2W 0B3, Canada;
| | - Yanwen Wang
- Aquatic and Crop Resource Development Research Centre, National Research Council of Canada, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada
- Correspondence: (X.R.); (Y.W.); Tel.: +86-411-65864645 (X.R.); +1-902-566-7953 (Y.W.)
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12
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Zheng S, Zou S, Feng T, Sun S, Guo X, He M, Wang C, Chen H, Wang Q. Low temperature combined with high inoculum density improves alpha-linolenic acid production and biochemical characteristics of Chlamydomonas reinhardtii. BIORESOURCE TECHNOLOGY 2022; 348:126746. [PMID: 35065224 DOI: 10.1016/j.biortech.2022.126746] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/17/2022] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
Chlamydomonas reinhardtii grows fast and is rich in polyunsaturated fatty acids. To explore whether the alpha-linolenic acid (ALA) content can be further enhanced, the cultures were incubated under different culture temperatures, light intensities and inoculum densities. Results showed that temperature exhibited more great impact on ALA synthesis of C. reinhardtii than light intensity and inoculum size. The changes of light intensity and inoculum size displayed non-significant effects on ALA content. The optimal ALA proportion in cells was obtained under the condition of 10 °C, 50 μE/m2/s and 5% inoculum density, which reached ∼ 39%.The augmented initial inoculum density could markedly improve the biomass of C. reinhardtii under 10 °C. The maximum ALA productivity (16.42 mg/L/d) was gained under 10 °C coupled with 25% inoculum size, where higher intracellular sugar and protein yield were observed. These results suggest C. reinhardtii would be an alternative feedstock for the industrial production of ALA.
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Affiliation(s)
- Shiyan Zheng
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China; Jiangsu Institute of Marine Resources Development, Jiangsu Ocean University, Lianyungang 222005, China; Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang 222005, China
| | - Shangyun Zou
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China
| | - Tian Feng
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China
| | - Shourui Sun
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China
| | - Xiangxu Guo
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China
| | - Meilin He
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Changhai Wang
- Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang 222005, China
| | - Hui Chen
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China; Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Qiang Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China; Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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13
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Lin W, Chen L, Tan Z, Deng Z, Liu H. Application of filamentous fungi in microalgae-based wastewater remediation for biomass harvesting and utilization: From mechanisms to practical application. ALGAL RES 2022. [DOI: 10.1016/j.algal.2021.102614] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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14
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Girotto F, Piazza L. Food waste bioconversion into new food: A mini-review on nutrients circularity in the production of mushrooms, microalgae and insects. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2022; 40:47-53. [PMID: 34348508 DOI: 10.1177/0734242x211038189] [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] [Indexed: 06/13/2023]
Abstract
The global challenge of feeding an ever-increasing world population is leading scientists' attention towards nutritious and sustainable foods whose production should have low impacts on environment, economy and society. In case the input feedstock can be waste nutrients, the label of such productions becomes even greener. Nutrients circularity is nowadays an important circular economy practice. This mini-review focuses on the valorisation of food waste as precious biomass to grow new food and feed. In particular, three functional edibles are discussed in the present paper: mushrooms, microalgae and insects. These foods are part of people diets since ages in certain areas of the world and the original aspect of their cultivation and breeding found on waste nutrients recovery is here reviewed. Proofs of such food waste biorefinery viability are already given by several researches featuring the main traits of a suitable growing medium: optimal pool of nutrients and optimal pH. However, lot of work still needs to be done in order to assess the optimal growth and cultivation conditions and the health security of the harvested/bred edibles. A SWOT factors analysis was performed.
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Affiliation(s)
- Francesca Girotto
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milano, Italy
| | - Laura Piazza
- Department of Environmental Science and Policy, Università degli Studi di Milano, Milano, Italy
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15
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Chen F, Leng Y, Lu Q, Zhou W. The application of microalgae biomass and bio-products as aquafeed for aquaculture. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102541] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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16
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A state-of-the-art review on the synthetic mechanisms, production technologies, and practical application of polyunsaturated fatty acids from microalgae. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102281] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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17
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Sijil PV, Adki VR, Sarada R, Chauhan VS. Stress induced modifications in photosystem II electron transport, oxidative status, and expression pattern of acc D and rbc L genes in an oleaginous microalga Desmodesmus sp. BIORESOURCE TECHNOLOGY 2020; 318:124039. [PMID: 32896711 DOI: 10.1016/j.biortech.2020.124039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 06/11/2023]
Abstract
The study aimed at understanding the biochemical and molecular level modifications in Desmodesmus sp. under lipid inducing stress conditions. The low-temperature (5 °C) incubation and nitrogen starvation reduced the PS II electron transport in microalga with a maximum reduction of 50-57% in ET0/ABS values. The PS II electron transport recovered in UV treated cultures after an initial reduction of 87-93% in ET0/ABS values. A 2.7-4.4 fold increase in ROS and MDA levels was observed under low-temperature incubation, and nitrogen starvation. The UV treatment caused 1.3-2.4 fold higher ROS and MDA levels than control. The low-temperature incubated, nitrogen starved, and UV treated cultures showed 2.4-4 fold higher acc D gene expression. A higher rbc L gene expression was observed under low-temperature stress. The study showed modifications in PS II electron transport, oxidative status, and expression of acc D and rbc L genes under stress conditions.
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Affiliation(s)
- P V Sijil
- Plant Cell Biotechnology (PCBT) Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Vinaya R Adki
- Plant Cell Biotechnology (PCBT) Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570 020, India
| | - R Sarada
- Plant Cell Biotechnology (PCBT) Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - V S Chauhan
- Plant Cell Biotechnology (PCBT) Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India.
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18
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Dourou M, Dritsas P, Baeshen MN, Elazzazy A, Al-Farga A, Aggelis G. High-added value products from microalgae and prospects of aquaculture wastewaters as microalgae growth media. FEMS Microbiol Lett 2020; 367:fnaa081. [PMID: 32407478 DOI: 10.1093/femsle/fnaa081] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 05/12/2020] [Indexed: 12/13/2022] Open
Abstract
Aquaculture plays an important role in human nutrition and economic development but is often expanded to the detriment of the natural environment. Several research projects, aimed at cultivating microalgae in aquaculture wastewaters (AWWs) to reduce organic loads and minerals, along with the production of microalgal cell mass and metabolic products, are underway. Microalgal cell mass is of high nutritional value and is regarded as a candidate to replace, partially at least, the fish meal in the fish feed. Also, microalgal cell mass is considered as a feedstock in the bio-fuel manufacture, as well as a source of high-added value metabolic products. The production of these valuable products can be combined with the reuse of AWWs in the light of environmental concerns related with the aquaculture sector. Many research papers published in the last decade demonstrate that plenty of microalgae species are able to efficiently grow in AWWs, mainly derived from fish and shrimp farms, and produce valuable metabolites reducing the AWW pollutant load. We conclude that bio-remediation of AWWs combining with the production of microalgae cell mass and specific metabolites is probably the most convenient and economical solution for AWWs management and can contribute to the sustainable growth of the aquaculture.
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Affiliation(s)
- Marianna Dourou
- Unit of Microbiology, Division of Genetics, Cell and Developmental Biology, Department of Biology, University of Patras, 26504 Patras, Greece
| | - Panagiotis Dritsas
- Unit of Microbiology, Division of Genetics, Cell and Developmental Biology, Department of Biology, University of Patras, 26504 Patras, Greece
| | - Mohamed N Baeshen
- Department of Biology, Faculty of Science, University of Jeddah, 23218 Jeddah, Saudi Arabia
| | - Ahmed Elazzazy
- Department of Biology, Faculty of Science, University of Jeddah, 23218 Jeddah, Saudi Arabia
- Department of Chemistry of Natural and Microbial Products, Division of Pharmaceutical and Drug Industries, National Research Centre, Dokki, 12622 Giza, Egypt
| | - Ammar Al-Farga
- Department of Biology, Faculty of Science, University of Jeddah, 23218 Jeddah, Saudi Arabia
| | - George Aggelis
- Unit of Microbiology, Division of Genetics, Cell and Developmental Biology, Department of Biology, University of Patras, 26504 Patras, Greece
- Department of Biology, Faculty of Science, University of Jeddah, 23218 Jeddah, Saudi Arabia
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19
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Chen F, Xiao Y, Wu X, Zhong Y, Lu Q, Zhou W. Replacement of feed by fresh microalgae as a novel technology to alleviate water deterioration in aquaculture. RSC Adv 2020; 10:20794-20800. [PMID: 35517726 PMCID: PMC9054309 DOI: 10.1039/d0ra03090b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 05/12/2020] [Indexed: 11/21/2022] Open
Abstract
The main aim of this work was to evaluate the feasibility of microalgae-assisted aquaculture and explore the relevant mechanisms. In this regard, our work explored the pollution problems in traditional aquaculture and studied the contribution of microalgae to eutrophication control, oxygen gas production and feed replacement. Besides, potential protection mechanisms of microalgae-assisted aquaculture were studied by bacterial community profile analysis and microscope observation. The results showed that microalgae performed well in nutrient assimilation and oxygen production, thus slowing down the eutrophication and preventing oxygen depletion in aquaculture. Study of the mechanisms revealed that microalgae-assisted aquaculture contained much fewer pathogens and a microalgal biofilm was formed to prevent the eutrophication caused by sludge degradation. It is expected that the findings in this work can support the further development of microalgae-assisted aquaculture and promote the industry upgrade.
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Affiliation(s)
- Fufeng Chen
- School of Resources, Environmental & Chemical Engineering, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University Nanchang 330031 China
| | - Yan Xiao
- School of Resources, Environmental & Chemical Engineering, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University Nanchang 330031 China
| | - Xiongwei Wu
- School of Resources, Environmental & Chemical Engineering, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University Nanchang 330031 China
| | - Yuqing Zhong
- School of Resources, Environmental & Chemical Engineering, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University Nanchang 330031 China
| | - Qian Lu
- School of Resources, Environmental & Chemical Engineering, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University Nanchang 330031 China
| | - Wenguang Zhou
- School of Resources, Environmental & Chemical Engineering, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University Nanchang 330031 China
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20
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Ma R, Zhao X, Ho SH, Shi X, Liu L, Xie Y, Chen J, Lu Y. Co-production of lutein and fatty acid in microalga Chlamydomonas sp. JSC4 in response to different temperatures with gene expression profiles. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.101821] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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21
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Qiu S, Shen Y, Zhang L, Ma B, Amadu AA, Ge S. Antioxidant assessment of wastewater-cultivated Chlorella sorokiniana in Drosophila melanogaster. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.101795] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Li J, Wang L, Lu Q, Zhou W. Toxicity alleviation for microalgae cultivation by cationic starch addition and ammonia stripping and study on the cost assessment. RSC Adv 2019; 9:38235-38245. [PMID: 35541807 PMCID: PMC9075837 DOI: 10.1039/c9ra03454d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 11/05/2019] [Indexed: 12/16/2022] Open
Abstract
Aiming at promoting microalgae-based anaerobically digested swine manure (AD-SM) treatment, this work evaluated the feasibility of removing turbidity and ammonia in swine manure by cationic starch addition and air bubbling-driven ammonia stripping. It was observed that turbidity and ammonia toxicity were two main factors limiting algae growth. Addition of cationic starch effectively reduced turbidity of AD-SM by 77.10% in 40 min. 6 L min−1 air flow rate and 5 h stripping time were regarded as good conditions for ammonia stripping. An economic analysis was conducted to assess the feasibility of this pretreatment strategy in a pilot scale system and results indicated that unit energy input and freshwater consumption were 0.036 kW h g−1 dry biomass and 0.76 L g−1 dry biomass, respectively, much lower than those of a high dilution strategy. So it is a more promising and feasible way to pretreat AD-SM with low dilution by turbidity removal and ammonia stripping. Aiming at promoting microalgae-based anaerobically digested swine manure (AD-SM) treatment, this work evaluated the feasibility of removing turbidity and ammonia in swine manure by cationic starch addition and air bubbling-driven ammonia stripping.![]()
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Affiliation(s)
- Jun Li
- School of Resources, Environmental & Chemical Engineering, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University Nanchang 330031 China
| | - Lin Wang
- School of Resources, Environmental & Chemical Engineering, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University Nanchang 330031 China
| | - Qian Lu
- School of Resources, Environmental & Chemical Engineering, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University Nanchang 330031 China
| | - Wenguang Zhou
- School of Resources, Environmental & Chemical Engineering, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University Nanchang 330031 China
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23
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Abstract
Traditional aquaculture provides food for humans, but produces a large amount of wastewater, threatening global sustainability. The antibiotics abuse and the water replacement or treatment causes safety problems and increases the aquaculture cost. To overcome environmental and economic problems in the aquaculture industry, a lot of efforts have been devoted into the application of microalgae for wastewater remediation, biomass production, and water quality control. In this review, the systematic description of the technologies required for microalgae-assisted aquaculture and the recent progress were discussed. It deeply reviews the problems caused by the discharge of aquaculture wastewater and introduces the principles of microalgae-assisted aquaculture. Some interesting aspects, including nutrients assimilation mechanisms, algae cultivation systems (raceway pond and revolving algal biofilm), wastewater pretreatment, algal-bacterial cooperation, harvesting technologies (fungi-assisted harvesting and flotation), selection of algal species, and exploitation of value-added microalgae as aquaculture feed, were reviewed in this work. In view of the limitations of recent studies, to further reduce the negative effects of aquaculture wastewater on global sustainability, the future directions of microalgae-assisted aquaculture for industrial applications were suggested.
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24
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Lu Q, Han P, Chen F, Liu T, Li J, Leng L, Li J, Zhou W. A novel approach of using zeolite for ammonium toxicity mitigation and value-added Spirulina cultivation in wastewater. BIORESOURCE TECHNOLOGY 2019; 280:127-135. [PMID: 30769323 DOI: 10.1016/j.biortech.2019.02.042] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 02/06/2019] [Accepted: 02/07/2019] [Indexed: 06/09/2023]
Abstract
Owning to the ammonium toxicity, some ammonium-rich wastewater may not be used for algae cultivation. To overcome this problem, herein, a novel approach of using zeolite to mitigate ammonium toxicity in wastewater for value-added Spirulina production was proposed. Synthetic zeolite was used as medium for ammonium adsorption in wastewater and subsequently as slow-releaser providing nitrogen to Spirulina growth. The optimal conditions for ammonium adsorption include pH value of 8.0, zeolite dose of 300 g/L, and adsorption time of 9 h. The results showed that in terms of biomass production and ammonium recovery, zeolite-based pretreatment has great advantages over some conventional pretreatment technologies. After algae-assisted desorption treatment, ammonium adsorption capacity of zeolite increased back to 1.21 mg/g. In a real-world application, this work will provide a feasible and sustainable approach to remediate ammonium-rich wastewater, produce value-added Spirulina biomass, and recycle used zeolite, further promoting the industrialization of algae-based wastewater remediation.
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Affiliation(s)
- Qian Lu
- School of Resources, Environmental & Chemical Engineering and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, China
| | - Pei Han
- School of Resources, Environmental & Chemical Engineering and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, China
| | - Fufeng Chen
- School of Resources, Environmental & Chemical Engineering and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, China
| | - Tonggui Liu
- School of Resources, Environmental & Chemical Engineering and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, China
| | - Jun Li
- School of Resources, Environmental & Chemical Engineering and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, China
| | - Lijian Leng
- School of Resources, Environmental & Chemical Engineering and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, China
| | - Jingjing Li
- School of Resources, Environmental & Chemical Engineering and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, China
| | - Wenguang Zhou
- School of Resources, Environmental & Chemical Engineering and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, China.
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25
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Zhang L, Pei H, Yang Z, Wang X, Chen S, Li Y, Xie Z. Microalgae nourished by mariculture wastewater aids aquaculture self-reliance with desirable biochemical composition. BIORESOURCE TECHNOLOGY 2019; 278:205-213. [PMID: 30703638 DOI: 10.1016/j.biortech.2019.01.066] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 01/15/2019] [Accepted: 01/17/2019] [Indexed: 06/09/2023]
Abstract
Increased awareness of freshwater consumption for microalgal cultivation and excessive investment for aquaculture feeds has driven studies towards building a recycling system. Thereby, mariculture wastewaters (MW) modified with monosodium glutamate residue (MSGR) or NaNO3 & K2HPO4 were used to culture microalgae, and then whether generated microalgae could meet nutritional standards for aquatic animals was evaluated. The results showed that MW + MSGR was the optimum medium for microalgae as aquaculture feeds: microalgae could accumulate plentiful high-quality protein with essential amino acid indices exceeding 0.90; and 13.49% of the fatty acids in microalgae were highly unsaturated, attributed to the organic carbon and some dehydrogenase present in MSGR. Furthermore, microalgae could provide desirable carotenoids, which have been proposed as an important defensive line to scavenge the excess oxidants under salinity stress. Additionally, elemental composition satisfied standard limits for safe consumption. In combination, aquaculture achieved self-reliance by virtue of microalgae with desirable biochemical composition.
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Affiliation(s)
- Lijie Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Haiyan Pei
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China; Shandong Provincial Engineering Center on Environmental Science and Technology, Jinan 250061, China.
| | - Zhigang Yang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Xiaodong Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Shuaiqi Chen
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Yizhen Li
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Zhen Xie
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China; School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
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26
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Yaakob MA, Mohamed RMSR, Al-Gheethi A, Tiey A, Kassim AHM. Optimising of Scenedesmus sp. biomass production in chicken slaughterhouse wastewater using response surface methodology and potential utilisation as fish feeds. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:12089-12108. [PMID: 30827020 DOI: 10.1007/s11356-019-04633-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 02/19/2019] [Indexed: 06/09/2023]
Abstract
Production of Scenedesmus sp. biomass in chicken slaughterhouse wastewater (CSWW) is a promising alternative technique for commercial culture medium due to the high nutritional content of the generated biomass to be used as fish feeds. The current work deals with optimising of biomass production in CSWW using response surface methodology (RSM) as a function of two independent variables, namely temperature (10-30 °C) and photoperiod (6-24 h). The potential application of biomass yield as fish feeds was evaluated based on carbohydrate, protein and lipid contents. The results revealed that the best operating parameters for Scenedesmus sp. biomass production with high contents of carbohydrates, proteins and lipids were determined at 30 °C and after 24 h. The actual and predicted values were 2.47 vs. 3.09 g, 1.44 vs. 1.27 μg/mL, 29.9 vs. 31.60% and 25.75 vs. 28.44%, respectively. Moreover, the produced biomass has a high concentration of fatty acid methyl ester (FAME) as follows: 35.91% of C15:1; 17.58% of C24:1 and 14.11% of C18:1N9T. The biomass yields have 7.98% of eicosapentaenoic acid (EPA, C20:5N3) which is more appropriate as fish feeds. The Fourier transform infrared (FTIR) analysis of biomass revealed that the main functional groups included hydroxyl (OH), aldehyde (=C-H), alkanes and acyl chain groups. Scanning electron micrograph (SEM) and energy-dispersive X-ray spectroscopic analysis (EDS) indicated that the surface morphology and element distribution in biomass produced in BBM and CSWW were varied. The findings have indicated that the biomass produced in CSWW has high potential as fish feeds.
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Affiliation(s)
- Maizatul Azrina Yaakob
- Faculty of Civil and Environmental Engineering, Micro-Pollutant Research Centre, Universiti Tun Hussein Onn Malaysia, Parit Raja, Malaysia
| | - Radin Maya Saphira Radin Mohamed
- Faculty of Civil and Environmental Engineering, Micro-Pollutant Research Centre, Universiti Tun Hussein Onn Malaysia, Parit Raja, Malaysia.
| | - Adel Al-Gheethi
- Faculty of Civil and Environmental Engineering, Micro-Pollutant Research Centre, Universiti Tun Hussein Onn Malaysia, Parit Raja, Malaysia.
| | - Athirah Tiey
- Faculty of Civil and Environmental Engineering, Micro-Pollutant Research Centre, Universiti Tun Hussein Onn Malaysia, Parit Raja, Malaysia
| | - Amir Hashim Mohd Kassim
- Faculty of Civil and Environmental Engineering, Micro-Pollutant Research Centre, Universiti Tun Hussein Onn Malaysia, Parit Raja, Malaysia
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Yang L, Li H, Wang Q. A novel one-step method for oil-rich biomass production and harvesting by co-cultivating microalgae with filamentous fungi in molasses wastewater. BIORESOURCE TECHNOLOGY 2019; 275:35-43. [PMID: 30576912 DOI: 10.1016/j.biortech.2018.12.036] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 12/10/2018] [Accepted: 12/11/2018] [Indexed: 06/09/2023]
Abstract
Aiming at simplifying the harvesting procedure, reducing the production cost, and improving the quality of microalgae-based biodiesel, herein, a novel one-step method for oil-rich biomass production and harvesting was proposed by growing Chlorella sp. with Aspergillus sp. in molasses wastewater. Lipid content and fatty acid profile were measured to assess the suitability of microalgal-fungal biomass for biodiesel production. The results showed that the highest biomass yield (4.215 g/L) was obtained when the inoculation ratio of fungi and microalgae was 100. Activities of fungi positive impacted the decolorization of wastewater and the removal of suspended solids. Thus, co-cultivation system had better performance than mono-system of microalgae in the removal of nutrients in wastewater. Analysis of biomass compositions showed that compared with mono-system of microalgae, co-cultivation system produced biomass with higher lipid content (35.2%) and yield microbial cell oil with lower unsaturation degree, potentially increasing the quality of microbial-cell-lipid based biodiesel.
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Affiliation(s)
- Limin Yang
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center of Nanjing University, Nanjing 210061, China
| | - Huankai Li
- Department of Food Science, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Qin Wang
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center of Nanjing University, Nanjing 210061, China; Department of Food Science, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
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Sijil PV, Sarada R, Chauhan VS. Enhanced accumulation of alpha-linolenic acid rich lipids in indigenous freshwater microalga Desmodesmus sp.: The effect of low-temperature on nutrient replete, UV treated and nutrient stressed cultures. BIORESOURCE TECHNOLOGY 2019; 273:404-415. [PMID: 30463054 DOI: 10.1016/j.biortech.2018.11.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 11/05/2018] [Accepted: 11/08/2018] [Indexed: 06/09/2023]
Abstract
The indigenous microalga, Desmodesmus sp. produced alpha-linolenic acid (ALA) rich lipids in response to low temperature and UV treatment. Incubation at 5 °C showed a 1.5 fold increase in lipid content (34% w/w) with 44% ALA fraction of total fatty acids. The UV treatment (UV 60 min) exhibited a 1.4 fold increase in biomass productivity and 1.6 fold increase in lipid content (37% w/w) with ALA fraction as 31% of total fatty acids. The nitrogen stress enhanced the lipid content (39% w/w) with a reduced ALA fraction (18%) of total fatty acids. The UV treated cultures (UV 40 and 60 min) on incubation at 5 °C showed maximum lipid accumulation (59 to 62% w/w) with ALA fraction of total fatty acids as 39 to 42%. The incubation of nutrient-replete and UV treated cultures at low-temperature could therefore be used for the production of ALA-rich lipids in microalgae.
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Affiliation(s)
- P V Sijil
- Plant Cell Biotechnology (PCBT) Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru - 570 020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201 002, India
| | - R Sarada
- Plant Cell Biotechnology (PCBT) Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru - 570 020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201 002, India
| | - V S Chauhan
- Plant Cell Biotechnology (PCBT) Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru - 570 020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201 002, India.
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Soares J, Kriiger Loterio R, Rosa RM, Santos MO, Nascimento AG, Santos NT, Williams TCR, Nunes-Nesi A, Arêdes Martins M. Scenedesmus sp. cultivation using commercial-grade ammonium sources. ANN MICROBIOL 2017. [DOI: 10.1007/s13213-017-1315-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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