1
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Wang Z, Liu Z, Wang J, Zhao D, Wei J, Peng Y, Miao L. Characterizing algal-bacterial symbiotic biofilms: Insights into coexistence of algae and anaerobic microorganisms. BIORESOURCE TECHNOLOGY 2024; 406:130966. [PMID: 38876287 DOI: 10.1016/j.biortech.2024.130966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/14/2024] [Accepted: 06/11/2024] [Indexed: 06/16/2024]
Abstract
This study constructed an integrated algae/partial nitrification/anammox biofilm system and operated it for 240 days. The total nitrogen removal efficiency exceeded 90 %. The structure, compositions, and function of this symbiotic biofilm, which played a pivotal role in the system, were analyzed in detail. Microscope photos and fluorescence in situ hybridization both showed that bacteria and algae were well integrated. The dissolved oxygen gradient further confirmed that different functional microorganisms grew at varying depths within biofilm. Algae formed an oxygen-producing zone (0-0.48 mm), followed by ammonia oxidizing bacteria (AOB) consuming oxygen to form an oxygen-consuming zone (0.48-0.86 mm), and anaerobic ammonia oxidizing bacteria (AnAOB) removed nitrogen in anaerobic zone (>0.86 mm). Chlorella, Nitrosomonas and Candidatus_Kuenenia were identified as the dominant algae, AOB and AnAOB, with relative abundances of 11.80 %, 19.77 % and 3.07 %, respectively. This layered biofilm benefitted providing a suitable environment for various microorganisms to survive within a complex biofilm.
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Affiliation(s)
- Zongping Wang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR. China
| | - Zuocheng Liu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR. China
| | - Jinlong Wang
- College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Daotong Zhao
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR. China
| | - Junchi Wei
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR. China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Lei Miao
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR. China.
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2
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Pereira ASADP, Silva TAD, Magalhães IB, Ferreira J, Braga MQ, Lorentz JF, Assemany PP, Couto EDAD, Calijuri ML. Biocompounds from wastewater-grown microalgae: a review of emerging cultivation and harvesting technologies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 920:170918. [PMID: 38354809 DOI: 10.1016/j.scitotenv.2024.170918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/22/2024] [Accepted: 02/10/2024] [Indexed: 02/16/2024]
Abstract
Microalgae biomass has attracted attention as a feedstock to produce biofuels, biofertilizers, and pigments. However, the high production cost associated with cultivation and separation stages is a challenge for the microalgae biotechnology application on a large scale. A promising approach to overcome the technical-economic limitations of microalgae production is using wastewater as a nutrient and water source for cultivation. This strategy reduces cultivation costs and contributes to valorizing sanitation resources. Therefore, this article presents a comprehensive literature review on the status of microalgae biomass cultivation in wastewater, focusing on production strategies and the accumulation of valuable compounds such as lipids, carbohydrates, proteins, fatty acids, and pigments. This review also covers emerging techniques for harvesting microalgae biomass cultivated in wastewater, discussing the advantages and limitations of the process, as well as pointing out the main research opportunities. The novelty of the study lies in providing a detailed analysis of state-of-the-art and potential advances in the cultivation and harvesting of microalgae, with a special focus on the use of wastewater and implementing innovative strategies to enhance productivity and the accumulation of compounds. In this context, the work aims to guide future research concerning emerging technologies in the field, emphasizing the importance of innovative approaches in cultivating and harvesting microalgae for advancing knowledge and practical applications in this area.
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Affiliation(s)
| | | | - Iara Barbosa Magalhães
- Federal University of Viçosa, Department of Civil Engineering, Viçosa, Minas Gerais, Brazil.
| | - Jessica Ferreira
- Federal University of Viçosa, Department of Civil Engineering, Viçosa, Minas Gerais, Brazil.
| | - Matheus Quintão Braga
- Federal University of Viçosa, Department of Civil Engineering, Viçosa, Minas Gerais, Brazil.
| | | | - Paula Peixoto Assemany
- Federal University of Lavras, Department of Environmental Engineering, Lavras, Minas Gerais, Brazil.
| | | | - Maria Lúcia Calijuri
- Federal University of Viçosa, Department of Civil Engineering, Viçosa, Minas Gerais, Brazil.
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3
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Cheng Y, Quan L, Vadiveloo A, Yang L, Saber AA, Lan S, A Alsaif SS, Wang Z, Wu L. Optimizing the algae-bacteria biofilm reactor for imidacloprid wastewater treatment: An evaluation of hydraulic retention times for enhanced efficiency and energy savings. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120420. [PMID: 38387358 DOI: 10.1016/j.jenvman.2024.120420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 01/30/2024] [Accepted: 02/15/2024] [Indexed: 02/24/2024]
Abstract
Recent observations have highlighted the rapidly growing prevalence of emerging contaminants such as Imidacloprid (IMI) within our environment. These insecticidal pollutants, coexisting with more traditional contaminants, have become predominant in aquatic systems, posing risks to both human and ecological well-being. Among the various wastewater treatment approaches tested, biofilm reactors are currently gaining prominence. In this study, we employed an Algae-Bacteria Biofilm Reactor (ABBR) to concurrently address both conventional and emergent contaminants, specifically IMI, over an extended timeframe. Following a 60-day assessment, the ABBR consistently demonstrated removal efficiencies exceeding 85% for total dissolved nitrogen, ammonia nitrogen, and total dissolved phosphorus, and also achieved removal efficacy for the soluble chemical oxygen demand (sCOD). Despite the removal efficiency of IMI (with initial concentration is 1.0 mg/L) in ABBR showed a gradual decline over the extended period, it remained consistently effective over 50% due to the microalgae-mediated free radical reactions, indicating the ABBR's sustained efficiency in long-duration operations. Additionally, applying some non-conventional modifications, like aeration removal and reducing light exposure, demonstrated minimal impact on the reactor's pollutant removal efficiencies, achieving comparable results to the control group (which utilized aeration with a 14:10 light/dark ratio), 0.92 kW h/L/d of electricity can be saved economically, which accentuated the potential for energy conservation. An in-depth analysis of the treated effluents from the ABBRs, using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) technique, uncovered four potential transformation pathways for IMI. Overall, our findings suggest that these optimized processes did not influence the transformation products of IMI, thereby reaffirming the viability of our proposed optimization.
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Affiliation(s)
- Yongtao Cheng
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun, 130117, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430072, China
| | - Linghui Quan
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430072, China
| | - Ashiwin Vadiveloo
- Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Murdoch, WA, 6150, Australia
| | - Lie Yang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430072, China
| | - Abdullah A Saber
- Botany Department, Faculty of Science, Ain Shams University, Abbassia Square, Cairo, 11566, Egypt
| | - Shubin Lan
- Key Laboratory of Vegetation Ecology of the Ministry of Education, Institute of Grassland Science/School of Environment, Northeast Normal University, Changchun, 130024, China
| | - Sara S A Alsaif
- Department of Botany and Microbiology, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Zhaojun Wang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun, 130117, China.
| | - Li Wu
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun, 130117, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430072, China.
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4
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Kong W, Kong J, Feng S, Yang T, Xu L, Shen B, Bi Y, Lyu H. Cultivation of microalgae-bacteria consortium by waste gas-waste water to achieve CO 2 fixation, wastewater purification and bioproducts production. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2024; 17:26. [PMID: 38360745 PMCID: PMC10870688 DOI: 10.1186/s13068-023-02409-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 10/10/2023] [Indexed: 02/17/2024]
Abstract
The cultivation of microalgae and microalgae-bacteria consortia provide a potential efficient strategy to fix CO2 from waste gas, treat wastewater and produce value-added products subsequently. This paper reviews recent developments in CO2 fixation and wastewater treatment by single microalgae, mixed microalgae and microalgae-bacteria consortia, as well as compares and summarizes the differences in utilizing different microorganisms from different aspects. Compared to monoculture of microalgae, a mixed microalgae and microalgae-bacteria consortium may mitigate environmental risk, obtain high biomass, and improve the efficiency of nutrient removal. The applied microalgae include Chlorella sp., Scenedesmus sp., Pediastrum sp., and Phormidium sp. among others, and most strains belong to Chlorophyta and Cyanophyta. The bacteria in microalgae-bacteria consortia are mainly from activated sludge and specific sewage sources. Bioengineer in CBB cycle in microalgae cells provide effective strategy to achieve improvement of CO2 fixation or a high yield of high-value products. The mechanisms of CO2 fixation and nutrient removal by different microbial systems are also explored and concluded, the importance of microalgae in the technology is proven. After cultivation, microalgae biomass can be harvested through physical, chemical, biological and magnetic separation methods and used to produce high-value by-products, such as biofuel, feed, food, biochar, fertilizer, and pharmaceutical bio-compounds. Although this technology has brought many benefits, some challenging obstacles and limitation remain for industrialization and commercializing.
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Affiliation(s)
- Wenwen Kong
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, People's Republic of China
- Hebei Engineering Research Center of Pollution Control in Power System, Hebei University of Technology, Tianjin, 300401, People's Republic of China
| | - Jia Kong
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, People's Republic of China
- Hebei Engineering Research Center of Pollution Control in Power System, Hebei University of Technology, Tianjin, 300401, People's Republic of China
| | - Shuo Feng
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, People's Republic of China
- Hebei Engineering Research Center of Pollution Control in Power System, Hebei University of Technology, Tianjin, 300401, People's Republic of China
| | - TianTian Yang
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, People's Republic of China
- Hebei Engineering Research Center of Pollution Control in Power System, Hebei University of Technology, Tianjin, 300401, People's Republic of China
| | - Lianfei Xu
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, People's Republic of China
- Hebei Engineering Research Center of Pollution Control in Power System, Hebei University of Technology, Tianjin, 300401, People's Republic of China
| | - Boxiong Shen
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, People's Republic of China.
- Hebei Engineering Research Center of Pollution Control in Power System, Hebei University of Technology, Tianjin, 300401, People's Republic of China.
| | - Yonghong Bi
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China.
| | - Honghong Lyu
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, People's Republic of China.
- Hebei Engineering Research Center of Pollution Control in Power System, Hebei University of Technology, Tianjin, 300401, People's Republic of China.
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5
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de Morais EG, Sampaio ICF, Gonzalez-Flo E, Ferrer I, Uggetti E, García J. Microalgae harvesting for wastewater treatment and resources recovery: A review. N Biotechnol 2023; 78:84-94. [PMID: 37820831 DOI: 10.1016/j.nbt.2023.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 09/21/2023] [Accepted: 10/07/2023] [Indexed: 10/13/2023]
Abstract
Microalgae-based wastewater treatment has been conceived to obtain reclaimed water and produce microalgal biomass for bio-based products and biofuels generation. However, microalgal biomass harvesting is challenging and expensive, hence one of the main bottlenecks for full-scale implementation. Finding an integrated approach that covers concepts of engineering, green chemistry and the application of microbial anabolism driven towards the harvesting processes, is mandatory for the widespread establishment of full-scale microalgae wastewater treatment plants. By using nature-based substances and applying concepts of chemical functionalization in already established harvesting methods, the costs of harvesting processes could be reduced while preventing microalgae biomass contamination. Moreover, microalgae produced during wastewater treatment have unique culture characteristics, such as the consortia, which are primarily composed of microalgae and bacteria, that should be accounted for prior to downstream processing. The aim of this review is to examine recent advances in microalgal biomass harvesting and recovery in wastewater treatment systems, considering the impact of consortia variability. The costs of available harvesting technologies, such as coagulation/flocculation, coupled to sedimentation and differential air flotation, are provided. Additionally, promising technologies are discussed, including autoflocculation, bioflocculation, new filtration materials, nanotechnology, microfluidic and magnetic methods.
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Affiliation(s)
- Etiele Greque de Morais
- GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya, BarcelonaTech, c/ Jordi Girona 1-3, Building D1, E-08034 Barcelona, Spain
| | - Igor Carvalho Fontes Sampaio
- CPID - Espírito Santo's Center for Research, Innovation and Development, Eliezer Batista hill, Jardim América, 29140-130 Cariacica, Espírito Santo, Brazil
| | - Eva Gonzalez-Flo
- GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya, BarcelonaTech, c/ Jordi Girona 1-3, Building D1, E-08034 Barcelona, Spain; GEMMA-Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Escola d'Enginyeria de Barcelona Est (EEBE), Universitat Politècnica de Catalunya-BarcelonaTech, Av. Eduard Maristany 16, Building C5.1, E-08019 Barcelona, Spain
| | - Ivet Ferrer
- GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya, BarcelonaTech, c/ Jordi Girona 1-3, Building D1, E-08034 Barcelona, Spain
| | - Enrica Uggetti
- GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya, BarcelonaTech, c/ Jordi Girona 1-3, Building D1, E-08034 Barcelona, Spain
| | - Joan García
- GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya, BarcelonaTech, c/ Jordi Girona 1-3, Building D1, E-08034 Barcelona, Spain.
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6
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Yu H, Ko D, Lee C. Continuous cultivation of mixed-culture microalgae using anaerobic digestion effluent in photobioreactors with different strategies for adjusting nitrogen loading rate. BIORESOURCE TECHNOLOGY 2023; 387:129650. [PMID: 37558101 DOI: 10.1016/j.biortech.2023.129650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/04/2023] [Accepted: 08/06/2023] [Indexed: 08/11/2023]
Abstract
This study examined continuous mixed-culture microalgae cultivation for nutrient removal from anaerobic digestion (AD) effluents in photobioreactors, while altering the NH4+-N loading rate (NLR) by adjusting either the hydraulic retention time (HRT) (reactor set RH) or the influent NH4+-N concentration (reactor set RS). Both RH and RS demonstrated efficient nutrient removal and microalgae cultivation at NLRs of 4-10 mg NH4+-N/L∙d, reaching peak performance at 10 mg NH4+-N/L∙d. Within this range, RH obtained greater biomass yield and productivity, while RS maintained higher microalgal concentrations. The cultivated biomasses obtained from RH and RS had good settleability and suitable fatty acid compositions as a biodiesel feedstock, although their organic composition varied considerably with NLR and HRT. Parachlorella overwhelmingly dominated the reactors' microalgal communities throughout the experiment, co-existing with various microalgae-associated bacteria. Changes in NLR significantly influenced the bacterial community structures, underscoring its critical role in determining reactor performance and microalgal-bacterial community behavior.
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Affiliation(s)
- Hyeonjung Yu
- Department of Urban & Environmental Engineering, UNIST, Ulsan 44919, Republic of Korea
| | - Dayoung Ko
- Department of Urban & Environmental Engineering, UNIST, Ulsan 44919, Republic of Korea
| | - Changsoo Lee
- Department of Urban & Environmental Engineering, UNIST, Ulsan 44919, Republic of Korea; Graduate School of Carbon Neutrality, UNIST, Ulsan 44919, Republic of Korea.
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7
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Liu Z, Hao N, Hou Y, Wang Q, Liu Q, Yan S, Chen F, Zhao L. Technologies for harvesting the microalgae for industrial applications: Current trends and perspectives. BIORESOURCE TECHNOLOGY 2023; 387:129631. [PMID: 37544545 DOI: 10.1016/j.biortech.2023.129631] [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: 07/04/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/08/2023]
Abstract
Microalgae are emerging as a promising source for augmenting the supply of essential products to meet global demands in an environmentally sustainable manner. Despite the potential benefits of microalgae in industry, the high energy consumption for harvesting remains a significant obstacle. This review offers a comprehensive overview of microalgae harvesting technologies and their industrial applications, with particular emphasis on the latest advances in flocculation techniques. These cutting-edge methods have been applied to biodiesel production, food and nutraceutical processing, and wastewater treatment. Large-scale harvesting is still severely impeded by the high cost despite progress has been made in laboratory studies. In the future, cost-effective microalgal harvesting will rely on efficient resource utilization, including the use of waste materials and the reuse of media and flocculants. Additionally, precise regulation of biological metabolism will be necessary to overcome algal species-related limitations through the development of extracellular polymeric substance-induced flocculation technology.
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Affiliation(s)
- Zhiyong Liu
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China
| | - Nahui Hao
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China; College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Yuyong Hou
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China
| | - Qing Wang
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China
| | - Qingling Liu
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China; College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Suihao Yan
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China; College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Fangjian Chen
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China
| | - Lei Zhao
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China.
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8
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Qin S, Wang K, Gao F, Ge B, Cui H, Li W. Biotechnologies for bulk production of microalgal biomass: from mass cultivation to dried biomass acquisition. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:131. [PMID: 37644516 PMCID: PMC10466707 DOI: 10.1186/s13068-023-02382-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 08/11/2023] [Indexed: 08/31/2023]
Abstract
Microalgal biomass represents a sustainable bioresource for various applications, such as food, nutraceuticals, pharmaceuticals, feed, and other bio-based products. For decades, its mass production has attracted widespread attention and interest. The process of microalgal biomass production involves several techniques, mainly cultivation, harvesting, drying, and pollution control. These techniques are often designed and optimized to meet optimal growth conditions for microalgae and to produce high-quality biomass at acceptable cost. Importantly, mass production techniques are important for producing a commercial product in sufficient amounts. However, it should not be overlooked that microalgal biotechnology still faces challenges, in particular the high cost of production, the lack of knowledge about biological contaminants and the challenge of loss of active ingredients during biomass production. These issues involve the research and development of low-cost, standardized, industrial-scale production equipment and the optimization of production processes, as well as the urgent need to increase the research on biological contaminants and microalgal active ingredients. This review systematically examines the global development of microalgal biotechnology for biomass production, with emphasis on the techniques of cultivation, harvesting, drying and control of biological contaminants, and discusses the challenges and strategies to further improve quality and reduce costs. Moreover, the current status of biomass production of some biotechnologically important species has been summarized, and the importance of improving microalgae-related standards for their commercial applications is noted.
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Affiliation(s)
- Song Qin
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, No. 19, Chunhui Road, Laishan District, Yantai, 264003, Shandong, China.
| | - Kang Wang
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, No. 19, Chunhui Road, Laishan District, Yantai, 264003, Shandong, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fengzheng Gao
- Bioprocess Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, Netherlands
- Laboratory of Sustainable Food Processing, ETH Zürich, 8092, Zurich, Switzerland
- Laboratory of Nutrition and Metabolic Epigenetics, ETH Zürich, 8603, Schwerzenbach, Switzerland
| | - Baosheng Ge
- College of Chemical Engineering and Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao, 266580, China
| | - Hongli Cui
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, No. 19, Chunhui Road, Laishan District, Yantai, 264003, Shandong, China
| | - Wenjun Li
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, No. 19, Chunhui Road, Laishan District, Yantai, 264003, Shandong, China
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9
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Vale F, Sousa CA, Sousa H, Simões LC, McBain AJ, Simões M. Bacteria and microalgae associations in periphyton-mechanisms and biotechnological opportunities. FEMS Microbiol Rev 2023; 47:fuad047. [PMID: 37586879 DOI: 10.1093/femsre/fuad047] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 08/02/2023] [Accepted: 08/14/2023] [Indexed: 08/18/2023] Open
Abstract
Phototrophic and heterotrophic microorganisms coexist in complex and dynamic structures called periphyton. These structures shape the biogeochemistry and biodiversity of aquatic ecosystems. In particular, microalgae-bacteria interactions are a prominent focus of study by microbial ecologists and can provide biotechnological opportunities for numerous applications (i.e. microalgal bloom control, aquaculture, biorefinery, and wastewater bioremediation). In this review, we analyze the species dynamics (i.e. periphyton formation and factors determining the prevalence of one species over another), coexisting communities, exchange of resources, and communication mechanisms of periphytic microalgae and bacteria. We extend periphyton mathematical modelling as a tool to comprehend complex interactions. This review is expected to boost the applicability of microalgae-bacteria consortia, by drawing out knowledge from natural periphyton.
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Affiliation(s)
- Francisca Vale
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Cátia A Sousa
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Henrique Sousa
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Lúcia C Simões
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- LABBELS - Associate Laboratory in Biotechnology, Bioengineering and Microelectromechanical Systems, Braga/Guimarães, Portugal
| | - Andrew J McBain
- School of Health Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PT, United Kingdom
| | - Manuel Simões
- ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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10
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Singh HM, Sharma M, Tyagi VV, Goria K, Buddhi D, Sharma A, Bruno F, Sheoran S, Kothari R. Potential of biogenic and non-biogenic waste materials as flocculant for algal biomass harvesting: Mechanism, parameters, challenges and future prospects. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 337:117591. [PMID: 36996549 DOI: 10.1016/j.jenvman.2023.117591] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 02/14/2023] [Accepted: 02/24/2023] [Indexed: 06/19/2023]
Abstract
In this review article, waste materials (biogenic/non-biogenic) are focused as the flocculants for harvesting of algal biomass. Chemical flocculants are widely utilized for the effective harvesting of algal biomass at a commercial scale while the high cost is a major drawback. The waste materials-based flocculants (WMBF) are started to utilize as one of the cost-effective performance for dual benefits of waste minimization and reuse for sustainable recovery of biomass. The novelty of the article is articulated with the objective that presents an insight of WMBF, classification of WMBF, preparation methods of WMBF, mechanisms of flocculation, factors affecting flocculation-mechanism, challenges and future recommendations that are required for harvesting of algae. The WMBF are shown similar flocculation mechanisms and flocculation efficiencies as chemical flocculants. Thus, the utilization of waste material for the flocculation process of algal cells minimizes the waste load into the environment and transforms the waste materials into valuable resources.
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Affiliation(s)
- Har Mohan Singh
- School of Energy Management, Shri Mata Vaishno Devi University, Katra, J&K, 182320, India
| | - Mriduta Sharma
- School of Energy Management, Shri Mata Vaishno Devi University, Katra, J&K, 182320, India
| | - V V Tyagi
- School of Energy Management, Shri Mata Vaishno Devi University, Katra, J&K, 182320, India.
| | - Kajol Goria
- Department of Environmental Sciences, Central University of Jammu, Rahya Suchani, (Bagla) Samba, J&K, 181143, India
| | - D Buddhi
- Uttaranchal Institute of Technology, Uttaranchal University, Uttarakhand, 248007, Dehradun, India
| | - Atul Sharma
- Non-Conventional Energy Laboratory, Rajiv Gandhi Institute of Petroleum Technology, Jais, Amethi, UP, India
| | - Frank Bruno
- Future Industries Institute, Mawson Lakes Campus, University of South Australia, Australia
| | - Shane Sheoran
- Future Industries Institute, Mawson Lakes Campus, University of South Australia, Australia
| | - Richa Kothari
- Department of Environmental Sciences, Central University of Jammu, Rahya Suchani, (Bagla) Samba, J&K, 181143, India.
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11
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Huang KX, Vadiveloo A, Zhou JL, Yang L, Chen DZ, Gao F. Integrated culture and harvest systems for improved microalgal biomass production and wastewater treatment. BIORESOURCE TECHNOLOGY 2023; 376:128941. [PMID: 36948428 DOI: 10.1016/j.biortech.2023.128941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 03/16/2023] [Accepted: 03/18/2023] [Indexed: 06/18/2023]
Abstract
Microalgae cultivation in wastewater has received much attention as an environmentally sustainable approach. However, commercial application of this technique is challenging due to the low biomass output and high harvesting costs. Recently, integrated culture and harvest systems including microalgae biofilm, membrane photobioreactor, microalgae-fungi co-culture, microalgae-activated sludge co-culture, and microalgae auto-flocculation have been explored for efficiently coupling microalgal biomass production with wastewater purification. In such systems, the cultivation of microalgae and the separation of algal cells from wastewater are performed in the same reactor, enabling microalgae grown in the cultivation system to reach higher concentration, thus greatly improving the efficiency of biomass production and wastewater purification. Additionally, the design of such innovative systems also allows for microalgae cells to be harvested more efficiently. This review summarizes the mechanisms, characteristics, applications, and development trends of the various integrated systems and discusses their potential for broad applications, which worth further research.
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Affiliation(s)
- Kai-Xuan Huang
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316000, China; National Engineering Research Center for Marine Aquaculture, Zhoushan 316000, China
| | - Ashiwin Vadiveloo
- Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, Perth 6150, Australia
| | - Jin-Long Zhou
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316000, China; Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhoushan 316000, China
| | - Lei Yang
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316000, China; Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhoushan 316000, China
| | - Dong-Zhi Chen
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316000, China; Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhoushan 316000, China
| | - Feng Gao
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316000, China; Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhoushan 316000, China.
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12
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Peng S, Wang Z, Yu P, Liao G, Liu R, Wang D, Zhang W. Aggregation and construction mechanisms of microbial extracellular polymeric substances with the presence of different multivalent cations: Molecular dynamic simulation and experimental verification. WATER RESEARCH 2023; 232:119675. [PMID: 36758351 DOI: 10.1016/j.watres.2023.119675] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 01/07/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
Interactions between cations and extracellular polymeric substances (EPS) play an important role in the formation of microbial aggregates and have key effects on the physical properties of activated sludge across wastewater and sludge treatment process. Here, a molecular model of EPS cluster in activated sludge was constructed and simulated by molecular dynamics (MD) to probe the structural properties of EPS and the interaction between EPS and prevalent multivalent cations (Ca2+, Mg2+, Al3+). Then the predicted changes in physical properties were validated against the dynamic light scattering, XAD resin fractionation and rheology test. The binding dynamics and interactions mechanisms between multivalent cations and EPS functional groups were further investigated using MD in combination with spectroscopic analysis. Results suggest that biopolymers are originally aggregated by electrostatic and intermolecular interactions forming dynamic clusters with negatively charged surface functional groups, which induced electrostatic repulsion preventing further agglomeration of biopolymer clusters. In the presence of multivalent cations, surface polar functional groups in biopolymers are connected, causing the rearrangement of EPS molecular conformation that forms larger and denser agglomerates. Reduced solvent accessible surface area, enhanced hydrophobicity, and increased binding free energy lead to a strong gel-like network of EPS. Ca2+ and Al3+ predominantly interact with functional groups in polysaccharides, promoting agglomeration of macromolecules. In contrast, Mg2+ and Al3+ disrupted the secondary structure of proteins, exposing hydrophobic interaction sites. Al3+ can better agglomerate biopolymers with its higher positive charge and shorter coordination distance as compared to Ca2+ and Mg2+, but compromised by the effect of hydration. This work offers a novel approach to explore the construction and molecular aggregation of EPS, enriching the theoretical basis for optimization of wastewater and sludge treatment.
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Affiliation(s)
- Sainan Peng
- Faculty Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Zhiyue Wang
- Department of Civil and Environmental Engineering, University of Hawai'i at Mānoa, USA, Honolulu, HI, USA 96822-2217; Water Resources Research Center, University of Hawai'i at Mānoa, USA, Honolulu, HI, USA 96822-2217.
| | - Pingfeng Yu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Guiying Liao
- Faculty Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Rui Liu
- Faculty Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Dongsheng Wang
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Weijun Zhang
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; National Engineering Laboratory of High Concentration Refractory Organic Wastewater Treatment Technology, Research Center for Eco-Environmental Science, Chinese Academy of Science, Beijing 100085, China.
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13
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Zheng L, Ren M, Liu T, Ding A, Xie E. Base type determines the effects of nucleoside monophosphates on microalgae-bacteria symbiotic systems. CHEMOSPHERE 2023; 317:137943. [PMID: 36702408 DOI: 10.1016/j.chemosphere.2023.137943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 12/09/2022] [Accepted: 01/22/2023] [Indexed: 06/18/2023]
Abstract
Microalgae are promising sources of clean energy. Bioflocculation by cocultured bacteria is an effective way to harvest microalgae. As a key foundation for microorganisms, phosphorus is theoretically effective in shaping microalgae production and flocculation. In this study, the impacts of 23 nucleoside monophosphates on Auxenochlorella pyrenoidosa growth, lipid synthesis, and self-settlement and on the symbiotic bacterial system were investigated. Adenosine monophosphate was the most effective in enhancing microalgae development (2.14-3.16 × 108 cells/mL) and lipid production (average 10.48%) and resulted in a low settling velocity. Samples were divided into two groups, purine and pyrimidine feeding, according to a random forest analysis (OOB = 0%, p < 0.001). Purine feeding resulted in the highest soluble extracellular protein and polysaccharide secretion (p < 0.01). KEGG ortholog count prediction of functional genes related to biofilm formation was conducted using PICRUSt2, and significant upregulation (FC ≥ 1.77, p < 0.05) of the extracellular polymeric substance formation functional group was observed in the adenosine and guanosine treatments. The symbiotic bacterial community structure differed substantially between purine- and pyrimidine-feeding systems. In summary, these results indicated that the effect of nucleoside monophosphates on the microalgae-bacteria system is determined by the base type (purine or pyrimidine) rather than the molecular structure (cyclic or noncyclic).
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Affiliation(s)
- Lei Zheng
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China
| | - Mengli Ren
- Middle Reach Hydrology and Water Resource Bureau of YRCC, Shanxi, 030600, PR China
| | - Tingting Liu
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China
| | - Aizhong Ding
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China
| | - En Xie
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, PR China; Engineering Research Center of Agricultural Water-Saving and Water Resources, Ministry of Education, China Agricultural University, Beijing, 100083, PR China.
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14
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Algal-algal bioflocculation enhances the recovery efficiency of Picochlorum sp. QUCCCM130 with low auto-settling capacity. ALGAL RES 2023. [DOI: 10.1016/j.algal.2023.103038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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15
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Liu J, Qin H, Meng X, Fan X, Zhu N, Sun S, Zhao Y, Jiang Z. Nutrient removal from biogas slurry and biogas upgrading by microalgae-fungi-bacteria co-cultivation under different carbon nanotubes concentration. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:36023-36032. [PMID: 36542281 DOI: 10.1007/s11356-022-24822-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 12/13/2022] [Indexed: 06/17/2023]
Abstract
In this study, Chlorella vulgaris, Ganoderma lucidum, and endophytic bacteria were co-cultivated with the stimulation of strigolactone analogs GR24 to prepare pellets. During the purification of biogas slurry and biogas, multi-walled carbon nanotubes (MWCNTs) were introduced to enhance the removal efficiencies of nutrients and CO2. The results showed that both GR24 and MWCNTs affected the purification of biogas slurry and biogas. The maximum chemical oxygen demand, total nitrogen, total phosphorus, and CO2 removal efficiencies of the Chlorella vulgaris-Ganoderma lucidum-endophytic bacterial symbionts were 82.57 ± 7.96% (P < 0.05), 82.14 ± 7.87% (P < 0.05), 84.27 ± 7.96% (P < 0.05), and 63.93 ± 6.22% (P < 0.05), respectively, with the induction of 10-9 M GR24 and 1 mg L-1 MWCNTs. Moreover, the growth and photosynthetic performance of the symbionts were consistent with the removal effects. The Chlorella vulgaris-Ganoderma lucidum-endophytic bacterial symbionts obtained high growth rates and enzyme activity with the maximum growth rate of 0.365 ± 0.03 d-1, mean daily productivity of 0.182 ± 0.016 g L-1 d-1, and carbonic anhydrase activity of 31.07 ± 2.75 units, respectively. These results indicated that an appropriate concentration of GR24 and MWCNTs could promote the growth of symbionts, reinforce the purification effects of biogas slurry and biogas, and provide a new idea for the simultaneous purification of wastewater and biogas.
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Affiliation(s)
- Jinsong Liu
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, 314001, People's Republic of China
| | - Haiyan Qin
- The 11th Geological Section of Zhejiang Province, 325006, Wenzhou, People's Republic of China
| | - Xiangzhou Meng
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, People's Republic of China
- Jiaxing-Tongji Environmental Research Institute, 1994 Linggongtang Road, Jiaxing, 314051, Zhejiang Province, People's Republic of China
| | - Xingjun Fan
- College of Resource and Environment, Anhui Science and Technology University, Fengyang, 233100, People's Republic of China
| | - Ningzheng Zhu
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, People's Republic of China
- Jiaxing-Tongji Environmental Research Institute, 1994 Linggongtang Road, Jiaxing, 314051, Zhejiang Province, People's Republic of China
| | - Shiqing Sun
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, 314001, People's Republic of China
| | - Yongjun Zhao
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, 314001, People's Republic of China.
| | - Zhoujia Jiang
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, 314001, People's Republic of China
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, 314001, People's Republic of China
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16
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Dubey S, Chen CW, Haldar D, Tambat VS, Kumar P, Tiwari A, Singhania RR, Dong CD, Patel AK. Advancement in algal bioremediation for organic, inorganic, and emerging pollutants. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 317:120840. [PMID: 36496067 DOI: 10.1016/j.envpol.2022.120840] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/25/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Rapidly changing bioremediation prospects are key drive to develop sustainable options that can offer extra benefits rather than only environmental remediation. Algal remediating is gaining utmost attention due to its mesmerising sustainable features, removing odour and toxicity, co-remediating numerous common and emerging inorganic and organic pollutants from gaseous and aqueous environments, and yielding biomass for a range of valuable products refining. Moreover, it also improves carbon footprint via carbon-capturing offers a better option than any other non-algal process for several high CO2-emitting industries. Bio-uptake, bioadsorption, photodegradation, and biodegradation are the main mechanisms to remediate a range of common and emerging pollutants by various algae species. Bioadsorption was a dominant remediation mechanism among others implicating surface properties of pollutants and algal cell walls. Photodegradable pollutants were photodegraded by microalgae by adsorbing photons on the surface and intracellularly via stepwise photodissociation and breakdown. Biodegradation involves the transportation of selective pollutants intracellularly, and enzymes help to convert them into simpler non-toxic forms. Robust models are from the green microalgae group and are dominated by Chlorella species. This article compiles the advancements in microalgae-assisted pollutants remediation and value-addition under sustainable biorefinery prospects. Moreover, filling the knowledge gaps, and recommendations for developing an effective platform for emerging pollutants remediation and realization of commercial-scale algal bioremediation.
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Affiliation(s)
- Siddhant Dubey
- Institute of Aquatic Science and Technology, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan
| | - Chiu-Wen Chen
- Institute of Aquatic Science and Technology, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan; Sustainable Environment Research Centre, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan; Department of Marine Environmental Engineering, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan
| | - Dibyajyoti Haldar
- Department of Biotechnology, Karunya Institute of Technology and Sciences, Coimbatore, 641114, India
| | - Vaibhav Sunil Tambat
- Institute of Aquatic Science and Technology, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan
| | - Prashant Kumar
- Institute of Aquatic Science and Technology, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan
| | - Ashutosh Tiwari
- Institute of Aquatic Science and Technology, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan
| | - Reeta Rani Singhania
- Sustainable Environment Research Centre, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan; Department of Marine Environmental Engineering, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan; Department of Biotechnology, Karunya Institute of Technology and Sciences, Coimbatore, 641114, India
| | - Cheng-Di Dong
- Institute of Aquatic Science and Technology, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan; Sustainable Environment Research Centre, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan; Department of Marine Environmental Engineering, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan
| | - Anil Kumar Patel
- Institute of Aquatic Science and Technology, College of Hydrosphere, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan; Centre for Energy and Environmental Sustainability, Lucknow, 226 029, Uttar Pradesh, India.
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17
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Xing L, Yang J, Zhang Y, Ni BJ, Yang C, Yuan C, Li A. Model-based evaluation of the impacts of aeration on tightly bound and loosely bound extracellular polymeric substance production under non-steady-state conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158566. [PMID: 36075439 DOI: 10.1016/j.scitotenv.2022.158566] [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: 02/21/2022] [Revised: 08/15/2022] [Accepted: 09/02/2022] [Indexed: 06/15/2023]
Abstract
Tightly bound extracellular polymeric substances (TB-EPS) and loosely bound extracellular polymeric substances (LB-EPS) affect the flocculability and settleability of sludge and the transfer of oxygen, which are highly related to aeration. In this study, we systemically evaluated the expanded unified model-TL2.1 for its long-term simulation of TB-EPS and LB-EPS. Two different aeration conditions and three different influent carbon sources were used to evaluate the model, and the simulation results fit well with the experimental data. TB-EPS and LB-EPS production increased with aeration intensity. The influence of aeration parameters on TB-EPS and LB-EPS production in a short-term batch system and long-term sequencing batch reactor (SBR) system was compared. The aeration parameters included the total transfer coefficient (kLa) and the concentration of dissolved oxygen at the interface (CS). To ensure a high removal rate of substrates and ammonia nitrogen and achieve a stable active biomass concentration, the following aeration parameters can be adopted to reduce energy wastage during aeration: when CS is 2 mg/L, kLa can be set above 30 h-1 and below 50 h-1; when kLa is 50 h-1, CS can be set above 1 mg/L and below 1.5 mg/L. This study systematically revealed the influence of aeration on TB-EPS and LB-EPS formation in an SBR system through a mathematical model, and it provides a theoretical basis for better understanding aeration.
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Affiliation(s)
- Lulu Xing
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China
| | - Jixian Yang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China
| | - Yueyan Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China
| | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Chao Yang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China
| | - Chunyan Yuan
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China
| | - Ang Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China.
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18
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Zhou Y, Zhou Y, Chen S, Guo N, Xiang P, Lin S, Bai Y, Hu X, Zhang Z. Evaluating the role of algae in algal-bacterial granular sludge: Nutrient removal, microbial community and granular characteristics. BIORESOURCE TECHNOLOGY 2022; 365:128165. [PMID: 36283664 DOI: 10.1016/j.biortech.2022.128165] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/13/2022] [Accepted: 10/15/2022] [Indexed: 06/16/2023]
Abstract
Algal-bacterial granular sludge (ABGS) and bacterial granular sludge (BGS, control group) were operated over 240 days to investigate the role of algae in treating synthetic municipal wastewater. The results showed that algae significantly improved the removal efficiency of total nitrogen (TN). The nitrogen removal load of ABGS was 2.6 mg-N/g-VSS/day (22.8 %, light) and 1.1 mg-N/g-VSS/day (9.6 %, dark) higher than that of BGS, respectively, which was attributed to algae enhanced NH3-N removal capacity in the anaerobic stage and increased the utilization efficiency of organics in denitrification. Algae increased the relative abundance of denitrifying bacteria, and ABGS (28.83 %) was higher than BGS (14.28 %). Moreover, the dominant phylum of algae was Chlorophyta (98.39 %), the chlorophyll-a was sustained at 1.28 ± 0.26 mg/g-VSS. Algae significantly increased the content of extracellular polymeric substances (EPS), and the increased polysaccharide came from the tightly bound EPS. This study expands the understanding of the role of algae in ABGS.
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Affiliation(s)
- Yingying Zhou
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Yuanhang Zhou
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Siqin Chen
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Niuniu Guo
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Ping Xiang
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Shutao Lin
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Yun Bai
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Xueli Hu
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Zhi Zhang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China.
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19
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Ding M, Wang C, Woo Bae S, Yong Ng H. Enhanced nutrient removal and bioenergy production in microalgal photobioreactor following anaerobic membrane bioreactor for decarbonized wastewater treatment. BIORESOURCE TECHNOLOGY 2022; 364:128120. [PMID: 36244603 DOI: 10.1016/j.biortech.2022.128120] [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: 08/31/2022] [Revised: 10/07/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
This study investigated the nutrient removal, decarbonization potentials, and bioenergy production (i.e., algal biomass and biogas) between a membrane photobioreactor (MPBR) and a sequencing photobioreactor (SPBR) as the post-treatment process of an anaerobic membrane bioreactor (AnMBR) for municipal wastewater treatment. All photobioreactors without aeration showed favourable performance on AnMBR effluent polishing and bioenergy production. In comparison, MPBRs achieved higher removal efficiencies with 98.4 %-99.1 % NH4-N and 74.8 %-88.4 % PO4-P removal compared to the SPBRs with 41.1 %-82.0 % NH4-N and 39.6 %-72.9 % PO4-P removal. MPBRs enhanced more nutrient utilization (24.9-49.3 g(N)/(m3·d) and 3.4-8.1 g(P)/(m3·d)) and CO2 assimilation (22.9-43.4 g(C)/(m3·d)), and concentrated more microalgae with 1.58-1.98 g/L higher than the SPBRs. Moreover, the MPBR effectively upgraded the biogas from AnMBR with superior methane percentage of 89.4 %-93.4 % due to its better CO2 biofixation. The MPBR, with better carbon, nitrogen and phosphorous removal and bioenergy production, following AnMBR is an attractive decarbonized technology for future sustainable wastewater treatment.
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Affiliation(s)
- Meiyue Ding
- Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore; National University of Singapore Environmental Research Institute, 5A Engineering Drive 1, 117411, Singapore
| | - Chuansheng Wang
- Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore
| | - Sung Woo Bae
- Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore
| | - How Yong Ng
- Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore; Center for Water Research, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, 519087, China.
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20
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Abbew AW, Amadu AA, Qiu S, Champagne P, Adebayo I, Anifowose PO, Ge S. Understanding the influence of free nitrous acid on microalgal-bacterial consortium in wastewater treatment: A critical review. BIORESOURCE TECHNOLOGY 2022; 363:127916. [PMID: 36087656 DOI: 10.1016/j.biortech.2022.127916] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/31/2022] [Accepted: 09/04/2022] [Indexed: 06/15/2023]
Abstract
Microalgal-bacterial consortium (MBC) constitutes a sustainable and efficient alternative to the conventional activated sludge process for wastewater treatment (WWT). Recently, integrating the MBC process with nitritation (i.e., shortcut MBC) has been proposed to achieve added benefits of reduced carbon and aeration requirements. In the shortcut MBC system, nitrite or free nitrous acid (FNA) accumulation exerts antimicrobial influences that disrupt the stable process performance. In this review, the formation and interactions that influence the performance of the MBC were firstly summarized. Then the influence of FNA on microalgal and bacterial monocultures and related mechanisms together with the knowledge gaps of FNA influence on the shortcut MBC were highlighted. Other challenges and future perspectives that impact the scale-up of the shortcut MBC for WWT were illustrated. A potential roadmap is proposed on how to maximize the stable operation of the shortcut MBC system for sustainable WWT and high-value biomass production.
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Affiliation(s)
- Abdul-Wahab Abbew
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Ayesha Algade Amadu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Shuang Qiu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Pascale Champagne
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Ismaeel Adebayo
- School of Chemical Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Peter Oluwaseun Anifowose
- School of Science, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Shijian Ge
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China.
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21
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Cheng Y, Wang H, Deng Z, Wang J, Liu Z, Chen Y, Ma Y, Li B, Yang L, Zhang Z, Wu L. Efficient removal of Imidacloprid and nutrients by algae-bacteria biofilm reactor (ABBR) in municipal wastewater: Performance, mechanisms and the importance of illumination. CHEMOSPHERE 2022; 305:135418. [PMID: 35750233 DOI: 10.1016/j.chemosphere.2022.135418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 04/25/2022] [Accepted: 06/16/2022] [Indexed: 06/15/2023]
Abstract
Neonicotinoids, such as Imidacloprid (IMI), are frequently detected in water and wastewater, posing a threat on both the environment and the health of living things. In this work, a novel algae-bacteria biofilm reactor (ABBR) was constructed to remove IMI and conventional nutrients from municipal wastewater, aiming to explore the removal effect and advantage of ABBR. Results showed that ABBR achieved 74.9% removal of IMI under 80 μmol m-2·s-1 light, higher than photobioreactor (PBR) without biofilm (61.2%) or ABBR under 40 μmol m-2·s-1 light (48.4%) after 16 days of operation. Moreover, it also showed that ABBR allowed a marked improvement on the removal of total dissolved nitrogen (TDN), total dissolved phosphorus (TDP) and soluble chemical oxygen demand (sCOD). ABBR showed different IMI removal efficiencies and bacterial communities under different light conditions, indicating that light played an important role in driving ABBR. The merits of ABBR are including (i) ABBR showed rapid pollutant removal in a short time, (ii) in ABBR, stable consortiums were formed and chlorophyll content in effluent was very low, (iii) compared with PBR, degradation products in ABBR showed lower biological toxicity. Our study highlights the benefits of ABBR on IMI removing from municipal wastewater and provides an effective and environment-friendly engineering application potential of IMI removal.
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Affiliation(s)
- Yongtao Cheng
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Hongyu Wang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Zhikang Deng
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Jiping Wang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Zhe Liu
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Yulin Chen
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Yongfei Ma
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Bolin Li
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Lie Yang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Zulin Zhang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China; The James Hutton Institute, Craigiebuckler, Aberdeen, ABI5 8QH, UK
| | - Li Wu
- Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China.
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22
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Qi S, Chen J, Hu Y, Hu Z, Zhan X, Stengel DB. Low energy harvesting of hydrophobic microalgae (Tribonema sp.) by electro-flotation without coagulation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:155866. [PMID: 35568179 DOI: 10.1016/j.scitotenv.2022.155866] [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: 02/27/2022] [Revised: 05/07/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
Microalgae have great potential for biofuel production and wastewater treatment, but the high cost of harvesting hinders their practical application. In this study, economical harvesting of hydrophobic microalgae by electro-flotation without coagulation was assessed. The harvesting performance of this method for selected species of freshwater microalgae with different degrees of hydrophobicity (Tribonema sp., highly hydrophobic; Scenedesmus sp., moderately hydrophobic; and Pandorina sp., hydrophilic) were compared. It was found that microalgal hydrophobicity played a critical role in electro-flotation. Under the same condition (current 0.3 A, velocity gradient 200 s-1, biomass concentration 1 g/L), Tribonema sp. could be effectively harvested (96.2 ± 0.4%) after 20 min of electro-flotation, while the harvesting efficiency decreased significantly with Scenedesmus sp. (70.1 ± 5.2%, 20 min) and Pandorina sp. (<10%, 1 h). The influences of current, electrolysis time, mixing intensity (velocity gradient) and biomass concentration on Tribonema sp. (hydrophobic) harvesting were further investigated. Increasing the current within a certain range (0.1 A-0.4 A) was beneficial to harvesting, while it's further increase decreased floating velocity, which was similar to the effect of the velocity gradient. Under the optimal condition, the harvesting efficiency of Tribonema sp. was 96.3% and the energy consumption (0.19 kWh/kg biomass) was much lower than other harvesting techniques, indicating that electro-flotation is a time-saving and economical approach for hydrophobic microalgae harvesting.
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Affiliation(s)
- Shasha Qi
- Civil Engineering, College of Science and Engineering, National University of Ireland Galway, Galway, Ireland; School of Civil Engineering, Hefei University of Technology, Hefei, China
| | - Jingrou Chen
- Civil Engineering, College of Science and Engineering, National University of Ireland Galway, Galway, Ireland
| | - Yuansheng Hu
- Civil Engineering, College of Science and Engineering, National University of Ireland Galway, Galway, Ireland; Ryan Institute, National University of Ireland Galway, Galway, Ireland.
| | - Zhenhu Hu
- School of Civil Engineering, Hefei University of Technology, Hefei, China
| | - Xinmin Zhan
- Civil Engineering, College of Science and Engineering, National University of Ireland Galway, Galway, Ireland; Ryan Institute, National University of Ireland Galway, Galway, Ireland; MaREI Research Centre, National University of Ireland Galway, Galway, Ireland.
| | - Dagmar B Stengel
- Ryan Institute, National University of Ireland Galway, Galway, Ireland; Botany and Plant Science, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
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23
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Wang H, Wu P, Zheng D, Deng L, Wang W. N-Acyl-Homoserine Lactone (AHL)-Mediated Microalgal-Bacterial Communication Driving Chlorella-Activated Sludge Bacterial Biofloc Formation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:12645-12655. [PMID: 35881886 DOI: 10.1021/acs.est.2c00905] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
N-acyl-homoserine lactones (AHLs) as autoinducers of Gram-negative bacteria for quorum sensing regulation have shown positive effects on the production of aromatic proteins in extracellular polymeric substances (EPSs) during bioflocculation. To investigate the role of AHLs in aromatic protein production, a Chlorella-bacteria system with great bioflocculation was established via fed-batch cultivation. Tryptophan and aromatic proteins as the main compounds in the EPS of bioflocs showed an increasing trend during fed-batch cultivation. The Chlorella cells only secreted tryptophan rather than aromatic proteins during axenic cultivation. N-dodecanoyl-l-homoserine lactone (C12-HSL) was correlated with the flocculation activity and extracellular protein content of bioflocs during fed-batch cultivation. The addition of exogenous C12-HSL enhanced the flocculation activity of the Chlorella-bacteria system and aromatic protein production in the EPS. Chlorella cells sensed exogenous C12-HSL and significantly upregulated the aromatic protein synthesis pathway during axenic cultivation. In addition, vanillin as a quorum-sensing inhibitor suppressed the positive effect of C12-HSL on flocculation activity and aromatic protein production and synthesis. This result indicated that vanillin intercepts the response of Chlorella cells to C12-HSL. Overall, C12-HSL is supposed to be an important signal molecule to achieve communication between Chlorella and Gram-negative bacteria and subsequently induce Chlorella cells to produce aromatic proteins for biofloc formation.
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Affiliation(s)
- Hong Wang
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China
| | - Peike Wu
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Dan Zheng
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Liangwei Deng
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Wenguo Wang
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
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24
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Kim G, Yea Y, Njaramba LK, Yoon Y, Kim S, Park CM. Synthesis, performance, and mechanisms of strontium ferrite-incorporated zeolite imidazole framework (ZIF-8) for the simultaneous removal of Pb(II) and tetracycline. ENVIRONMENTAL RESEARCH 2022; 212:113419. [PMID: 35537499 DOI: 10.1016/j.envres.2022.113419] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 04/28/2022] [Accepted: 05/01/2022] [Indexed: 06/14/2023]
Abstract
In this study, strontium ferrite (SF)-incorporated zeolite imidazole framework (ZIF-8) (SFZIF-8) that can simultaneously uptake Pb(II) and tetracycline (TC) in solution was synthesized and characterized. The physicochemical properties of the as-prepared SFZIF-8 were characterized by various functional groups, higher average pore diameter (3.414 nm), and stronger negative charge (-30.5 mV). Adsorption kinetics, isotherms, effect of various water conditions including solution pH and temperature, and reusability were studied to evaluate its adsorption performance. The adsorption capacity of SFZIF-8 was compared with that of commonly used adsorbents (powder and granular activated carbon). SFZIF-8 showed much higher adsorption performance (429.6 mg/g and 433.4 mg/g for Pb(II) and TC, respectively) than powder activated carbon (129.9 mg/g and 142.0 mg/g for Pb(II) and TC, respectively) and granular activated carbon (249.3 mg/g and 263.0 mg/g for Pb(II) and TC, respectively) in Pb(II) and TC binary solutions. The SFZIF-8 adsorption behaviors for the removal of Pb(II) and TC were explained by the pseudo-first-order and Langmuir models from the adsorption kinetics and isotherm experiments, respectively. The regenerated SFZIF-8 exhibited a competitive performance even after the third cycle. These results indicate that Pb(II) and TC can be removed with SFZIF-8 via electrostatic attraction, surface complexation, hydrogen bonding, and π-π interactions. Therefore, by exhibiting effective and efficient adsorption performance, SFZIF-8 nanocomposites can be utilized as alternative and promising adsorbents for the simultaneous removal of both Pb(II) and TC.
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Affiliation(s)
- Gyuri Kim
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.
| | - Yeonji Yea
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.
| | - Lewis Kamande Njaramba
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.
| | - Yeomin Yoon
- Department of Civil and Environmental Engineering, University of South Carolina, Columbia, 300 Main Street, SC, 29208, USA.
| | - Sewoon Kim
- Department of Civil and Environmental Engineering, University of Iowa, Iowa City, IA, 52242, USA.
| | - Chang Min Park
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.
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25
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Pekkoh J, Chaichana C, Thurakit T, Phinyo K, Lomakool S, Ruangrit K, Duangjan K, Suwannarach N, Kumla J, Cheirsilp B, Srinuanpan S. Dual-bioaugmentation strategy to enhance the formation of algal-bacteria symbiosis biofloc in aquaculture wastewater supplemented with agricultural wastes as an alternative nutrient sources and biomass support materials. BIORESOURCE TECHNOLOGY 2022; 359:127469. [PMID: 35700898 DOI: 10.1016/j.biortech.2022.127469] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 06/09/2022] [Accepted: 06/10/2022] [Indexed: 06/15/2023]
Abstract
This study performs an integrated evaluation of the formation and distribution of algal-bacterial bioflocs in aquaculture wastewater supplemented with agricultural waste, together with an assessment of their behavior in the microbial community and of the water quality of the system in which a new bioaugmentation strategy was applied. Results indicated that the dual bioaugmentation strategy via the consortium addition of bacteria and microalgae had the highest formation performance, providing the most compact biofloc structure (0.59 g/L), excellent settleability (71.91%), and a large particle diameter (4.25 mm). The fed-batch supplementation of molasses and rice bran, in terms of changes in the values of COD, NH4+, NO3-, and PO43-, stimulated the formation of biofloc through algal-bacterial bioflocs and microbe-rice bran complexes within a well-established microbial community. These findings provide new insight into the influence of bioaugmentation on the formation of an innovative algal-bacterial biofloc.
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Affiliation(s)
- Jeeraporn Pekkoh
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Science and Technology Research Institute, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chatchawan Chaichana
- Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Theera Thurakit
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Kittiya Phinyo
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Sureeporn Lomakool
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Khomsan Ruangrit
- Science and Technology Research Institute, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Kritsana Duangjan
- Science and Technology Research Institute, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Nakarin Suwannarach
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jaturong Kumla
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Benjamas Cheirsilp
- Center of Excellence in Innovative Biotechnology for Sustainable Utilization of Bioresources, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Sirasit Srinuanpan
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
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26
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Wang Q, Li H, Shen Q, Wang J, Chen X, Zhang Z, Lei Z, Yuan T, Shimizu K, Liu Y, Lee DJ. Biogranulation process facilitates cost-efficient resources recovery from microalgae-based wastewater treatment systems and the creation of a circular bioeconomy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 828:154471. [PMID: 35288130 DOI: 10.1016/j.scitotenv.2022.154471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/18/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
Energy self-sufficient wastewater treatment designs can reduce net energy consumption and achieve resources recovery. Microalgae are regarded as a promising candidate for developing a circular bioeconomy in wastewater treatment plants (WWTPs) due to its potential for simultaneous wastewater remediation and high value-added materials production. Much effort has been made to overcome the high production costs for microalgae; however, biomass harvesting still remains as the bottleneck for its large-scale application. In this study, the novel biogranulation system facilitating easier and faster microalgae harvesting was firstly compared with the conventional suspended culture for energy-efficiency and sustainability assessment on microalgae (Ankistrodesmus falcatus var. acicularis) cultivation using the synthetic anaerobic digestion liquor. Results demonstrated that the biogranulation system enhanced volumetric biomass productivity (223.17 ± 11.82 g/m3/day) by about 4.4 times compared to that from the suspended system (41.57 ± 2.08 g/m3/day) under the same environmental conditions. It was noticed that lipids, carbohydrates and proteins were accumulated in microalgae cells along with nutrients remediation, and the microalgae granules with much higher proteins content (313.28 ± 26.67 mg/g-VSS) could be easily harvested through 2 min gravity sedimentation with little impact on the contents of carbohydrates and lipids. In the whole cultivation and harvesting process, the biomass mass-based electricity consumption and footprint demand by the biogranulation system were reduced by 58% and 76%, respectively. Results from this study provide a cost-effective and sustainable approach for microalgae in the treatment of nutrients rich digestion liquor with simultaneous production of valuable biomaterials.
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Affiliation(s)
- Qian Wang
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Hui Li
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Qingyue Shen
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Jixiang Wang
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Xingyu Chen
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhenya Zhang
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhongfang Lei
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
| | - Tian Yuan
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuya Shimizu
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Yu Liu
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan; Department of Mechanical Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong
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27
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Patel AK, Singhania RR, Albarico FPJB, Pandey A, Chen CW, Dong CD. Organic wastes bioremediation and its changing prospects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 824:153889. [PMID: 35181362 DOI: 10.1016/j.scitotenv.2022.153889] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/04/2022] [Accepted: 02/11/2022] [Indexed: 05/21/2023]
Abstract
Increasing inappropriate anthropogenic activities and industrialization have resulted in severe environmental pollution worldwide. Their effective treatment is vital for general health concerns. Depending on the characteristics of pollutants, the severity of pollution may differ. For sustainable treatment of polluted environments, bioremediation is accepted as the most efficient, economical, and environmentally friendly method hence largely preferred. However, every bioremediation technique has its own unique advantages and limitations due to its defined applications criteria. In bioremediation, microorganisms play a decisive role in detoxification by degrading, mineralizing and accumulating various forms of harmful and biodegradable pollutants from the surroundings and transforming them into less lethal forms. Bioremediation is performed ex-situ or in-situ, based on location of polluted site as well as characteristics, type and strength of the pollutants. Furthermore, the most popular methodologies for bioremediation include bioaugmentation, biostimulation, bioattenuation among others which depend on the prevailing environmental factors into the microbial system. Implementing them appropriately and effectively under ex-situ or in-situ method is extremely important not only for obtaining efficient treatment but also for the best economic, environmental, and social impacts. Therefore, this review aims to analyze various bioremediation methods for organic pollutants remediation from soil/sediments and wastewater, their strength, limitation, and insights for the selection of appropriate bioremediation techniques based on nature, types, degree, and location of the pollution. The novelty aspect of the article is to give updates on several key supporting technologies which have recently emerged and exhibited great potential to enhance the present bioremediation efficiency such as nanobubble, engineered biochar, mixotrophic microalgae, nanotechnology etc. Moreover, amalgamation of these technologies with existing bioremediation facilities are significantly changing the scenario and scope of environmental remediation towards sustainable bioremediation.
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Affiliation(s)
- Anil Kumar Patel
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Sustainable Environment Research Center, National Kaohsiung University of science and Technology, Kaohsiung City 81157, Taiwan; Centre for Energy and Environmental Sustainability, Lucknow 226 029, Uttar Pradesh, India.
| | - Reeta Rani Singhania
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Sustainable Environment Research Center, National Kaohsiung University of science and Technology, Kaohsiung City 81157, Taiwan; Centre for Energy and Environmental Sustainability, Lucknow 226 029, Uttar Pradesh, India
| | - Frank Paolo Jay B Albarico
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Fisheries and Marine Research Station (FaMaRS), Fisheries and Marine Sciences Department, College of Fisheries and Allied Sciences, Northern Negros State College of Science and Technology, Sagay City 6122, Philippines
| | - Ashok Pandey
- Centre for Energy and Environmental Sustainability, Lucknow 226 029, Uttar Pradesh, India; Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research, Lucknow 226 001, India; Sustainability Cluster, School of Engineering, University of Petroleum and Energy Studies, Dehradun 248 007, Uttarakhand, India
| | - Chiu-Wen Chen
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Sustainable Environment Research Center, National Kaohsiung University of science and Technology, Kaohsiung City 81157, Taiwan
| | - Cheng-Di Dong
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Sustainable Environment Research Center, National Kaohsiung University of science and Technology, Kaohsiung City 81157, Taiwan.
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28
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Sánchez-Zurano A, Rossi S, Fernández-Sevilla JM, Acién-Fernández G, Molina-Grima E, Ficara E. Respirometric assessment of bacterial kinetics in algae-bacteria and activated sludge processes. BIORESOURCE TECHNOLOGY 2022; 352:127116. [PMID: 35398212 DOI: 10.1016/j.biortech.2022.127116] [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: 02/25/2022] [Revised: 03/30/2022] [Accepted: 04/01/2022] [Indexed: 06/14/2023]
Abstract
Algae-bacteria (AB) consortia can be exploited for effective wastewater treatment, based on photosynthetic oxygenation to reduce energy requirements for aeration. While algal kinetics have been extensively evaluated, bacterial kinetics in AB systems are still based on parameters taken from the activated sludge models, lacking an experimental validation for AB consortia. A respirometric procedure was therefore proposed, to estimate bacterial kinetics in both activated sludge and AB, under different conditions of temperature, pH, dissolved oxygen, and substrate availability. Bacterial activities were differently influenced by operational/environmental conditions, suggesting that the adoption of typical activated sludge parameters could be inadequate for AB modelling. Indeed, respirometric results show that bacteria in AB consortia were adapted to a wider range of conditions, compared to activated sludge, confirming that a dedicated calibration of bacterial kinetics is essential for effectively modelling AB systems, and respirometry was proven to be a powerful and reliable tool to this purpose.
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Affiliation(s)
- A Sánchez-Zurano
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain, CIESOL Solar Energy Research Centre, Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain
| | - S Rossi
- Politecnico di Milano, Dept. of Civil and Environmental Engineering, P.zza L. da Vinci, 32, 20133 Milan, Italy
| | - J M Fernández-Sevilla
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain, CIESOL Solar Energy Research Centre, Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain
| | - G Acién-Fernández
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain, CIESOL Solar Energy Research Centre, Joint Centre University of Almería-CIEMAT, 04120 Almería, Spain
| | - E Molina-Grima
- Department of Chemical Engineering, Universidad de Almería, 04120 Almería, Spain
| | - E Ficara
- Politecnico di Milano, Dept. of Civil and Environmental Engineering, P.zza L. da Vinci, 32, 20133 Milan, Italy.
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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: 6] [Impact Index Per Article: 3.0] [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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Oruganti RK, Katam K, Show PL, Gadhamshetty V, Upadhyayula VKK, Bhattacharyya D. A comprehensive review on the use of algal-bacterial systems for wastewater treatment with emphasis on nutrient and micropollutant removal. Bioengineered 2022; 13:10412-10453. [PMID: 35441582 PMCID: PMC9161886 DOI: 10.1080/21655979.2022.2056823] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 11/08/2022] Open
Abstract
The scarcity of water resources and environmental pollution have highlighted the need for sustainable wastewater treatment. Existing conventional treatment systems are energy-intensive and not always able to meet stringent disposal standards. Recently, algal-bacterial systems have emerged as environmentally friendly sustainable processes for wastewater treatment and resource recovery. The algal-bacterial systems work on the principle of the symbiotic relationship between algae and bacteria. This paper comprehensively discusses the most recent studies on algal-bacterial systems for wastewater treatment, factors affecting the treatment, and aspects of resource recovery from the biomass. The algal-bacterial interaction includes cell-to-cell communication, substrate exchange, and horizontal gene transfer. The quorum sensing (QS) molecules and their effects on algal-bacterial interactions are briefly discussed. The effect of the factors such as pH, temperature, C/N/P ratio, light intensity, and external aeration on the algal-bacterial systems have been discussed. An overview of the modeling aspects of algal-bacterial systems has been provided. The algal-bacterial systems have the potential for removing micropollutants because of the diverse possible interactions between algae-bacteria. The removal mechanisms of micropollutants - sorption, biodegradation, and photodegradation, have been reviewed. The harvesting methods and resource recovery aspects have been presented. The major challenges associated with algal-bacterial systems for real scale implementation and future perspectives have been discussed. Integrating wastewater treatment with the algal biorefinery concept reduces the overall waste component in a wastewater treatment system by converting the biomass into a useful product, resulting in a sustainable system that contributes to the circular bioeconomy.
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Affiliation(s)
- Raj Kumar Oruganti
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
| | - Keerthi Katam
- Department of Civil Engineering, École Centrale School of Engineering, Mahindra University, India
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham, Malaysia
| | - Venkataramana Gadhamshetty
- Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid, South Dakota, USA
| | | | - Debraj Bhattacharyya
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
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31
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Dong X, Wei J, Huang J, Zhao C, Sun S, Zhao Y, Liu J. Performance of different microalgae-fungi-bacteria co-culture technologies in photosynthetic and removal performance in response to various GR24 concentrations. BIORESOURCE TECHNOLOGY 2022; 347:126428. [PMID: 34838968 DOI: 10.1016/j.biortech.2021.126428] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/17/2021] [Accepted: 11/21/2021] [Indexed: 06/13/2023]
Abstract
The purification effect of two different microalgae-fungi-bacteria symbiosis technologies on biogas and biogas slurry was studied to determine the best symbiosis treatment technology and the suitable concentration of GR24. The results showed that the purification effect of biogas slurry in Chlorella vulgaris-Ganoderma lucidum-endophytic bacteria (S395-2) symbiont co-culture system was better than that of the biogas slurry in Scenedesmus obliquus-Pleurotus ostreatus-S395-2 symbionts. Following 10-9 M GR24 treatment, Chlorella vulgaris-Ganoderma lucidum-S395-2 symbionts had elevated mean daily production rate and growth rate by 1.92 and 1.46 folds in comparison with blank group. After adjusting the GR24 level within the range of 10-9 M-10-7 M, Ganoderma lucidum-assisted Chlorella vulgaris-S395-2 attained higher maximal removal rates for TN, COD, CO2, and TP by 10.78%, 14.62%, 3.86%, and 9.07%, respectively, compared to the rates when GR24 was not added.
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Affiliation(s)
- Xuechang Dong
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, PR China; Agronomy College, Jilin Agricultural University, Changchun 130118, Jilin, PR China
| | - Jing Wei
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing 314001, PR China
| | - Jing Huang
- College of Data Science, Jiaxing University, Jiaxing 314001, PR China
| | - Chunzhi Zhao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, PR China
| | - Shiqing Sun
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing 314001, PR China
| | - Yongjun Zhao
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, PR China.
| | - Juan Liu
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, PR China
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Kumar N, Banerjee C, Negi S, Shukla P. Microalgae harvesting techniques: updates and recent technological interventions. Crit Rev Biotechnol 2022; 43:342-368. [PMID: 35168457 DOI: 10.1080/07388551.2022.2031089] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Microalgal biomass has garnered attention as a renewable and sustainable resource for producing biodiesel. The harvesting of microalgal biomass is a significant bottleneck being faced by the industries as it is the crucial cost driver in the downstream processing of biomass. Bioharvesting of microalgal biomass mediated by: microbial, animal, and plant-based polymeric flocculants has gained a higher probability of utility in accumulation due to: its higher dewatering potential, less toxicity, and ecofriendly properties. The present review summarizes the key challenges and the technological advancements associated with various such harvesting techniques. The economic and technical aspects of different microalgal harvesting techniques, particularly the cationic polymeric flocculant-based harvesting of microalgal biomass, are also discussed. Furthermore, interactions of flocculants with microalgal biomass and the effects of these interactions on metabolite and lipid extractions are discussed to offer a promising solution for suitability in selecting the most efficient and economical method of microalgal biomass harvesting for cost-effective biodiesel production.
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Affiliation(s)
- Niwas Kumar
- Algal Bioenergy Laboratory, Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad, India
| | - Chiranjib Banerjee
- Algal Bioenergy Laboratory, Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad, India.,Department of Botany and Microbiology, Faculty of Life Sciences, Gurukula Kangri (Deemed to be University), Haridwar, India
| | - Sangeeta Negi
- Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - Pratyoosh Shukla
- School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi, India.,Enzyme Technology and Protein Bioinformatics Laboratory, Department of Microbiology, Maharshi Dayanand University, Rohtak, India
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He J, Ding W, Han W, Chen Y, Jin W, Zhou X. A bacterial strain Citrobacter W4 facilitates the bio-flocculation of wastewater cultured microalgae Chlorella pyrenoidosa. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:151336. [PMID: 34743821 DOI: 10.1016/j.scitotenv.2021.151336] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 10/26/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
A bacteria strain Citrobacter W4 isolated from the microalgae sewage culture system showed flocculating activity against Chlorella pyrenoidosa. In this work, operation parameters under outdoor conditions were optimized. When the bacterial-algal ratio was 4:1, G value was 26.30 s-1, and harvesting time was 6 h, the harvesting efficiency achieved 87.37 ± 2.96% without ions addition and pH adjustment. The microbial community structure analysis showed Citrobacter W4 was dominant in the harvesting process. Flocculating active substances were on the surface and metabolites of Citrobacter W4. The main component of bacteria flocculating active substances was protein. Polysaccharides and carboxylic acid also promoted flocculation. The flocculation mechanisms were mainly adsorption bridging, net catching, and sweeping, not electric neutralization. The quality of FAMEs was improved after flocculation. The cost of 1 kg dried microalgae flocculated by Citrobacter W4 was $1.35. The novel flocculating bacteria showed the potential to harvest microalgae cost-effectively and environmentally friendly.
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Affiliation(s)
- Jiawen He
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Wanqing Ding
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Wei Han
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Yidi Chen
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Wenbiao Jin
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
| | - Xu Zhou
- State Key Lab of Urban Water Resource and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China; Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
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Wang H, Deng L, Qi Z, Wang W. Constructed microalgal-bacterial symbiotic (MBS) system: Classification, performance, partnerships and perspectives. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 803:150082. [PMID: 34525774 DOI: 10.1016/j.scitotenv.2021.150082] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/27/2021] [Accepted: 08/29/2021] [Indexed: 06/13/2023]
Abstract
The microalgal-bacterial symbiotic (MBS) system shows great advantages in the synchronous implementation of wastewater treatment and nutrient recovery. To enhance the understanding of different MBS systems, this review summarizes reported MBS systems and proposes three patterns according to the living state of microalgae and bacteria. They are free microalgal-bacterial (FMB) system, attached microalgal-bacterial (AMB) system and bioflocculated microalgal-bacterial (BMB) system. Compared with the other two patterns, BMB system shows the advantages of microalgal biomass harvesting and application. To further understand the microalgal-bacterial partnerships in the bioflocculation of BMB system, this review discusses bioflocs characteristics, extracellular polymeric substances (EPS) properties and production, and the effect of microalgae/bacteria ratio and microalgal strains on the formation of bioflocculation. Microalgal biomass production and application are important for BMB system development in the future. Food processing wastewater characterized by high biodegradability and low toxicity should be conducive for microalgal cultivation. In addition, exogenous addition of functional bacteria for nutrient removal and bioflocculation formation would be a crucial research direction to facilitate the large-scale application of BMB system.
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Affiliation(s)
- Hong Wang
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China; Chengdu National Agricultural Science and Technology Center, Chengdu 610213, China
| | - Liangwei Deng
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China; Chengdu National Agricultural Science and Technology Center, Chengdu 610213, China
| | - Zhiyong Qi
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China; Chengdu National Agricultural Science and Technology Center, Chengdu 610213, China
| | - Wenguo Wang
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China; Chengdu National Agricultural Science and Technology Center, Chengdu 610213, China.
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35
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Bui-Xuan D, Tang DYY, Chew KW, Nguyen TDP, Le Ho H, Tran TNT, Nguyen-Sy T, Dinh THT, Nguyen PS, Dinh TMH, Nguyen TT, Show PL. Green biorefinery: Microalgae-bacteria microbiome on tolerance investigations in plants. J Biotechnol 2022; 343:120-127. [PMID: 34896159 DOI: 10.1016/j.jbiotec.2021.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 10/23/2021] [Accepted: 12/05/2021] [Indexed: 12/29/2022]
Abstract
Co-culture of microalgae and microorganisms, supported with the resulting synergistic effects, can be used for wastewater treatment, biomass production, agricultural applications and etc. Therefore, this study aimed to explore the role of Bacillus subtilis (B. subtilis) in tolerance against the harsh environment of seafood wastewater, at which these microalgal-bacterial flocs were formed by microalgae cultivation. In this present study, B. subtilis isolated from the cultivation medium of Chlorella vulgaris and exposed to different salinity (0.1-4% w/v sodium chloride) and various pH range to determine the tolerant ability and biofilm formation. Interestingly, this bacteria strain that isolated from microalgae cultivation medium showed the intense viability in the salt concentration exceeding up to 4% (w/v) NaCl but demonstrated the decrease in cell division as environmental culture undergoing over pH 10. Cell viability was recorded higher than 71% and 92% for B. subtilis inoculum in media with salt concentration greater than 20 gL-1 and external pH 6.5-9, respectively. This showed that B. subtilis isolated from microalgal-bacteria cocultivation exhibited its tolerant ability to survive in the extremely harsh conditions and thus, mitigating the stresses due to salinity and pH.
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Affiliation(s)
- Dong Bui-Xuan
- The University of Danang, University of Science and Technology, 54 Nguyen Luong Bang St., Danang 550 000, Viet Nam
| | - Doris Ying Ying Tang
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
| | - Kit Wayne Chew
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900 Sepang, Selangor Darul Ehsan, Malaysia; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China.
| | - Thi Dong Phuong Nguyen
- The University of Danang, University of Technology and Education, 48 Cao Thang St., Danang 550 000, Viet Nam.
| | - Han Le Ho
- Biological Resource Center/Korean Collection for Type Cultures (KCTC), Korea Research Institute of Bioscience and Biotechnology, Jeonbuk 56212, Republic of Korea; University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Thi Ngoc Thu Tran
- The University of Danang, University of Technology and Education, 48 Cao Thang St., Danang 550 000, Viet Nam
| | - Toan Nguyen-Sy
- The University of Danang, University of Technology and Education, 48 Cao Thang St., Danang 550 000, Viet Nam
| | - Thi Ha Thuong Dinh
- The University of Danang, University of Science and Education, 459 Ton Duc Thang St., Danang 550 000, Viet Nam
| | - Phuc Son Nguyen
- The University of Danang, University of Technology and Education, 48 Cao Thang St., Danang 550 000, Viet Nam
| | - Thi My Huong Dinh
- The University of Danang, University of Technology and Education, 48 Cao Thang St., Danang 550 000, Viet Nam
| | - Thanh Thuy Nguyen
- National Institute of Hygiene and Epidemiology, 01 Yecxanh St, Hanoi, Viet Nam
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
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Software tools for microalgae biorefineries: Cultivation, separation, conversion process integration, modeling, and optimization. ALGAL RES 2022. [DOI: 10.1016/j.algal.2021.102597] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Udayan A, Sirohi R, Sreekumar N, Sang BI, Sim SJ. Mass cultivation and harvesting of microalgal biomass: Current trends and future perspectives. BIORESOURCE TECHNOLOGY 2022; 344:126406. [PMID: 34826565 DOI: 10.1016/j.biortech.2021.126406] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/16/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
Microalgae are unicellular photosynthetic organisms capable of producing high-value metabolites like carbohydrates, lipids, proteins, polyunsaturated fatty acids, vitamins, pigments, and other high-value metabolites. Microalgal biomass gained more interest for the production of nutraceuticals, pharmaceuticals, therapeutics, food supplements, feed, biofuel, bio-fertilizers, etc. due to its high lipid and other high-value metabolite content. Microalgal biomass has the potential to convert trapped solar energy to organic materials and potential metabolites of nutraceutical and industrial interest. They have higher efficiency to fix carbon dioxide (CO2) and subsequently convert it into biomass and compounds of potential interest. However, to make microalgae a potential industrial candidate, cost-effective cultivation systems and harvesting methods for increasing biomass yield and reducing the cost of downstream processing have become extremely urgent and important. In this review, the current development in different microalgal cultivation systems and harvesting methods has been discussed.
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Affiliation(s)
- Aswathy Udayan
- Department of Chemical Engineering, Hanyang University, Seoul, South Korea
| | - Ranjna Sirohi
- Department of Chemical and Biological Engineering, Korea University, Seoul South Korea; Centre for Energy and Environmental Sustainability, Lucknow 226 029, Uttar Pradesh, India
| | - Nidhin Sreekumar
- Accubits Invent, Accubits Technologies Inc., Thiruvananthapuram 695 004, Kerala, India
| | - Byoung-In Sang
- Department of Chemical Engineering, Hanyang University, Seoul, South Korea
| | - Sang Jun Sim
- Department of Chemical and Biological Engineering, Korea University, Seoul South Korea.
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Zhang C, Li S, Ho SH. Converting nitrogen and phosphorus wastewater into bioenergy using microalgae-bacteria consortia: A critical review. BIORESOURCE TECHNOLOGY 2021; 342:126056. [PMID: 34601027 DOI: 10.1016/j.biortech.2021.126056] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 09/23/2021] [Accepted: 09/27/2021] [Indexed: 06/13/2023]
Abstract
Conventional wastewater treatment using activated sludge cannot efficiently eliminate nitrogen and phosphorus, thus engendering the risk of water eutrophication and ecosystem disruption. Fortunately, a new wastewater treatment process applying microalgae-bacteria consortia has attracted considerable interests due to its excellent performance of nutrients removal. Moreover, some bacteria facilitate the harvest of microalgal biomass through bio-flocculation. Additionally, while stimulating the functional bacteria, the improved biomass and enriched components also brighten bioenergy production from the perspective of practical applications. Thus, this review first summarizes the current development of nutrients removal and mutualistic interaction using microalgae-bacteria consortia. Then, advancements in bio-flocculation are completely described and the corresponding mechanisms are thoroughly revealed. Eventually, the recent advances of bioenergy production (i.e., biodiesel, biohydrogen, bioethanol, and bioelectricity) using microalgae-bacteria consortia are comprehensively discussed. Together, this review will provide the ongoing challenges and future developmental directions for better converting nitrogen and phosphorus wastewater into bioenergy using microalgae-bacteria consortia.
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Affiliation(s)
- Chaofan Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Shengnan Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Shih-Hsin Ho
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
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40
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Niemi C, Gentili FG. The use of natural organic flocculants for harvesting microalgae grown in municipal wastewater at different culture densities. PHYSIOLOGIA PLANTARUM 2021; 173:536-542. [PMID: 33779990 DOI: 10.1111/ppl.13409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/14/2021] [Accepted: 03/19/2021] [Indexed: 06/12/2023]
Abstract
Harvesting microalgae from liquid culture is a difficult issue to solve and is most commonly done through settling. However, settling is a slow process on its own and generally needs to be induced chemically or by introducing stress to the culture. Polymeric, cationic substances, such as cationised starch and chitosan, are often used for flocculation and settling. These large, positively charged molecules form large clusters with suspended particles in the liquid medium. In the present study, three natural organic flocculants (cationic starch, chitosan and acacia tannin S5T) were tested to harvest microalgal cultures grown in wastewater. Two microalgal species, one strain of Chlorella vulgaris and one strain of Scenedesmus obliquus, were cultured in municipal wastewater for different lengths of time, and settled using either cationic starch, chitosan or acacia tannin S5T. Results indicated that S5T worked with approximately the same efficiency in the two assayed species, although it requires a relatively high dosage to function (about 300 mg L-1 ), while the other two flocculants varied from species to species.
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Affiliation(s)
- Calle Niemi
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Francesco G Gentili
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, Umeå, Sweden
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41
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Qin L, Feng S, Feng P, Wang Z, Zhu S. Treatment of Synthetic Ammonium Sulfate Wastewater by Mixed Culture of Chlorella pyrenoidosa and Enriched Nitrobacteria. Curr Microbiol 2021; 78:3891-3900. [PMID: 34510224 DOI: 10.1007/s00284-021-02646-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 08/30/2021] [Indexed: 12/21/2022]
Abstract
Ammonium sulfate wastewater can cause eutrophication and black odor of water body. Although ammonia nitrogen can be used as nutrient of microalgae, high ammonia nitrogen levels could inhibit the growth of microalgae. Nitrobacteria can transform ammonia nitrogen into nitrate nitrogen. In this study, mono Chlorella pyrenoidosa culture (mono-C.py), synchronous mixed culture (mixed-a), and asynchronous mixed culture (mixed-b) systems were examined for their ability to treat ammonium sulfate wastewater. Nitrogen removal rate of mixed-b at the end of culture (52.96%) was higher than that of the mono-C.py (46.37%) and the mixed-a (39.11%). Higher total suspended solid concentration (2.40 g/L), crude protein yield (0.76 g/L), and heating value yield (35.73 kJ/L) were obtained in mixed-b, meanwhile with excellent settlement performance (91.43 ± 0.51%). Mechanism analysis of settlement showed that the relative abundance of floc-forming-related bacteria Sphingopyxis and Acidovorax were increased generally, while nitrification/denitrifying members were decreased in mixed-b along with the culture proceeding.
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Affiliation(s)
- Lei Qin
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, China.
| | - Siran Feng
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, China
| | - Pinzhong Feng
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, China
| | - Zhongming Wang
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, China
| | - Shunni Zhu
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, China.
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Hasan MN, Altaf MM, Khan NA, Khan AH, Khan AA, Ahmed S, Kumar PS, Naushad M, Rajapaksha AU, Iqbal J, Tirth V, Islam S. Recent technologies for nutrient removal and recovery from wastewaters: A review. CHEMOSPHERE 2021; 277:130328. [PMID: 33794428 DOI: 10.1016/j.chemosphere.2021.130328] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 03/12/2021] [Accepted: 03/16/2021] [Indexed: 06/12/2023]
Abstract
Water scarcity and its pollution has become a concern in recent times. The disposal of nutrient-rich (nitrogen and phosphorous) wastewater is also one of the main cause of water pollution through eutrophication, reduced dissolved oxygen that poses threat to aquatic ecosystems. As a result, nutrient removal has become a mandate apart from the removal of organics. However, the removal of nutrients from sewage is a challenging task. Conversely, conventional biological treatment processes provide little relief in nutrient removal. The treated effluents from conventional biological processes do not achieve the stringent nutrient removal disposal standard limits and become primary cause of pollution in the receiving water bodies. This has stressed upon the need for eco-friendly, low-energy and cost-efficient nutrient removal treatment technologies. Various biological treatment combinations or variants are in use for the efficient removal of nutrients. The biological processes in itself or in combination with chemical processes are preferred over technologies based solely on physico-chemical processes for its treatment performance at lower cost. This review summarizes the existing treatment processes and their possible up-gradation with the aim to accomplish the marked effluent standards for the nutrients. The concept of conventional systems and advanced systems for nutrients (nitrogen and phosphorous) removal which are already developed or under development are deeply discussed. Further, the challenges of each treatment systems are abridged. Finally, the possible suggestions for the modification/retrofitting of existing treatment systems for achieving stringent disposal standards are pointed out.
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Affiliation(s)
- Mohd Najibul Hasan
- Department of Civil Engineering, Jamia Millia Islamia (A Central University), New Delhi, 110025, India
| | - Mohd Musheer Altaf
- Department of Life Science, Institute of Information Management and Technology, Aligarh, India
| | - Nadeem A Khan
- Department of Civil Engineering, Jamia Millia Islamia (A Central University), New Delhi, 110025, India
| | - Afzal Husain Khan
- Department of Civil Engineering, Jazan University, 114, Jazan, Saudi Arabia.
| | - Abid Ali Khan
- Department of Civil Engineering, Jamia Millia Islamia (A Central University), New Delhi, 110025, India
| | - Sirajuddin Ahmed
- Department of Civil Engineering, Jamia Millia Islamia (A Central University), New Delhi, 110025, India
| | - P Senthil Kumar
- SSN-Centre for Radiation, Environmental Science and Technology (SSN-CREST), Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110, Tamil Nadu, India
| | - Mu Naushad
- Advanced Materials Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia; Yonsei Frontier Lab, Yonsei University, Seoul, South Korea; International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan, 173212, Himachal Pradesh, India.
| | - Anushka Upamali Rajapaksha
- Ecosphere Resilience Research Center, University of Sri Jayewardenepura, Nugegoda, 10250, Sri Lanka; Instrument Center, Faculty of Applied Sciences, University of Sri Jayewardenepura, Sri Lanka
| | - Jibran Iqbal
- College of Natural and Health Sciences, Zayed University, P.O. Box 144534, Abu Dhabi, United Arab Emirates
| | - Vineet Tirth
- Mechanical Engineering Department, College of Engineering, King Khalid University, Abha, 61411, Saudi Arabia; Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, 61413, Asir, Saudi Arabia
| | - Saiful Islam
- Civil Engineering Department, College of Engineering, King Khalid University, Abha, 61411, Saudi Arabia
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Tang CC, Zhang X, He ZW, Tian Y, Wang XC. Role of extracellular polymeric substances on nutrients storage and transfer in algal-bacteria symbiosis sludge system treating wastewater. BIORESOURCE TECHNOLOGY 2021; 331:125010. [PMID: 33773415 DOI: 10.1016/j.biortech.2021.125010] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/10/2021] [Accepted: 03/13/2021] [Indexed: 06/12/2023]
Abstract
This study reported the role and significance of extracellular polymeric substances (EPSs) on nutrients storage and transfer in an algal-bacteria symbiosis sludge (ABSS) system for wastewater treatment, and the novel algae-based sequencing batch suspended biofilm reactor (A-SBSBR, Ra) was selected as model of ABSS system. Results showed that compared to conventional SBSBR, the EPS of Ra performed better storage for NO2--N, NO3--N, total phosphorus and PO43- -P, with increase ratios of 43.7%, 36.0%, 34.1% and 14.7% in sludge phase and 174.0%, 147.4%, 150.4% and 122.0% in biofilm phase, respectively. The analysis of mechanisms demonstrated that microalgae active transport and uptake for divalent cations could enhance their local concentrations around ABS flocs and partially neutralized negative charge of EPSs, and more anions related to nutrients were absorbed in EPSs. Moreover, O2 produced by microalgae photosynthesis enhanced bacteria activity and improved the production of EPSs in both sludge and biofilm phases.
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Affiliation(s)
- Cong-Cong Tang
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Xinyi Zhang
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Zhang-Wei He
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Yu Tian
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiaochang C Wang
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an 710055, China
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Mahata C, Dhar S, Ray S, Das D. Flocculation characteristics of anaerobic sludge driven-extracellular polymeric substance (EPS) extracted by different methods on microalgae harvesting for lipid utilization. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2020.107898] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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45
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Yong JJJY, Chew KW, Khoo KS, Show PL, Chang JS. Prospects and development of algal-bacterial biotechnology in environmental management and protection. Biotechnol Adv 2020; 47:107684. [PMID: 33387639 DOI: 10.1016/j.biotechadv.2020.107684] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 11/24/2020] [Accepted: 12/22/2020] [Indexed: 12/11/2022]
Abstract
The coexistence of algae and bacteria in nature dates back to the very early stages when life came into existence. The interaction between algae and bacteria plays an important role in the planet ecology, cycling nutrients, and feeding higher trophic levels, and have been evolving ever since. The emerging concept of algal-bacterial consortia is gaining attention, much towards environmental management and protection. Studies have shown that algal-bacterial synergy does not only promote carbon capture in wastewater bioremediation but also consequently produces biofuels from algal-bacterial biomass. This review has evaluated the optimistic prospects of algal-bacterial consortia in environmental remediation, biorefinery, carbon sequestration as well as its contribution to the production of high-value compounds. In addition, algal-bacterial consortia offer great potential in bloom control, dye removal, agricultural biofertilizers, and bioplastics production. This work also emphasizes the advancement of algal-bacterial biotechnology in environmental management through the incorporation of Industry Revolution 4.0 technologies. The challenges include its pathway to greener industry, competition with other food additive sources, societal acceptance, cost feasibility, environmental trade-off, safety and compatibility. Thus, there is a need for further in-depth research to ensure the environmental sustainability and feasibility of algal-bacterial consortia to meet numerous current and future needs of society in the long run.
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Affiliation(s)
- Jasmine Jill Jia Yi Yong
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
| | - Kit Wayne Chew
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900 Sepang, Selangor, Malaysia
| | - Kuan Shiong Khoo
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia.
| | - Jo-Shu Chang
- Department of Chemical and Materials Engineering, Tunghai University, Taichung 407, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung 407, Taiwan; Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan.
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46
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Parakh SK, Praveen P, Loh KC, Tong YW. Integrating gravity settler with an algal membrane photobioreactor for in situ biomass concentration and harvesting. BIORESOURCE TECHNOLOGY 2020; 315:123822. [PMID: 32688254 DOI: 10.1016/j.biortech.2020.123822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 06/11/2023]
Abstract
Gravity settler was integrated into an algal membrane photobioreactor (MPBR) for in situ biomass concentration and harvesting of Graesiella emersonii. By continuous circulation of suspended biomass between MPBR and settler, biomass was sedimented in the settler and harvested. MPBR-Settler operations at different recirculation rates (0.15-2.4 L/d) and settler volumes (250-1000 mL) affected both suspended (0.4-3.4 g/L) and settled (16.1-31.1 g/L) biomass concentrations. Maximum biomass productivity of 0.26 ± 0.06 g/L/d was achieved in the 1000 mL settler operating at 0.6 L/d recirculation rate, which also yielded 9-131 times concentrated biomass (31.1 g/L) compared to the baseline MPBR (0.2-3.4 g/L). This novel design also facilitated MPBR operation at low solids retention times (6-8 d) without incurring large outflow of unfiltered effluent, while alleviating light limitation via biomass dilution. These results demonstrated that the MPBR-Settler system can provide an excellent way to mitigate light limitation, enhance biomass productivity, and simplify biomass harvesting.
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Affiliation(s)
- Sheetal Kishor Parakh
- NUS Environmental Research Institute, Singapore; Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore
| | | | - Kai-Chee Loh
- Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore
| | - Yen Wah Tong
- NUS Environmental Research Institute, Singapore; Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore.
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47
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Tan JS, Lee SY, Chew KW, Lam MK, Lim JW, Ho SH, Show PL. A review on microalgae cultivation and harvesting, and their biomass extraction processing using ionic liquids. Bioengineered 2020; 11:116-129. [PMID: 31909681 PMCID: PMC6999644 DOI: 10.1080/21655979.2020.1711626] [Citation(s) in RCA: 98] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
The richness of high-value bio-compounds derived from microalgae has made microalgae a promising and sustainable source of useful product. The present work starts with a review on the usage of open pond and photobioreactor in culturing various microalgae strains, followed by an in-depth evaluation on the common harvesting techniques used to collect microalgae from culture medium. The harvesting methods discussed include filtration, centrifugation, flocculation, and flotation. Additionally, the advanced extraction technologies using ionic liquids as extractive solvents applied to extract high-value bio-compounds such as lipids, carbohydrates, proteins, and other bioactive compounds from microalgae biomass are summarized and discussed. However, more work needs to be done to fully utilize the potential of microalgae biomass for the application in large-scale production of biofuels, food additives, and nutritive supplements.
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Affiliation(s)
- Jia Sen Tan
- Department of Biotechnology, Faculty of Applied Science, UCSI University, Kuala Lumpur, Malaysia
| | - Sze Ying Lee
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Sungai Long Campus, Kajang, Malaysia
| | - Kit Wayne Chew
- School of Mathematical Sciences, Faculty of Science and Engineering, University of Nottingham Malaysia, Selangor, Malaysia
| | - Man Kee Lam
- Chemical Engineering Department, Universiti Teknologi PETRONAS, Perak, Malaysia.,Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia
| | - Jun Wei Lim
- Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia.,Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS, Seri Iskandar, Malaysia
| | - Shih-Hsin Ho
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, China
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Semenyih, Malaysia
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48
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Utilization of microalgae for self-regulation of extracellular polymeric substance production. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107616] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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49
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Yin Z, Zhu L, Li S, Hu T, Chu R, Mo F, Hu D, Liu C, Li B. A comprehensive review on cultivation and harvesting of microalgae for biodiesel production: Environmental pollution control and future directions. BIORESOURCE TECHNOLOGY 2020; 301:122804. [PMID: 31982297 DOI: 10.1016/j.biortech.2020.122804] [Citation(s) in RCA: 131] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/07/2020] [Accepted: 01/10/2020] [Indexed: 05/05/2023]
Abstract
Biodiesel is one of the best promising candidates in response to the energy crisis, since it has the capability to minimize most of the environmental problems. Microalgae, as the feedstock of third-generation biodiesel, are considered as one of the most sustainable resources. However, microalgae production for biodiesel feedstock on a large scale is still limited, because of the influences of lipid contents, biomass productivities, lipid extraction technologies, the water used in microalgae cultivation and processes of biomass harvesting. This paper firstly reviews the recent advances in microalgae cultivation and growth processes. Subsequently, current microalgae harvesting technologies are summarized and flocculation mechanisms are analyzed, while the characteristics that the ideal harvesting methods should have are summarized. This review also summarizes the environmental pollution control performances and the key challenges in future. The key suggestions and conclusions in the paper can offer a promising roadmap for the cost-effective biodiesel production.
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Affiliation(s)
- Zhihong Yin
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, PR China
| | - Liandong Zhu
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, PR China; Faculty of Technology, and Vaasa Energy Institute, University of Vaasa, PO Box 700, FI-65101 Vaasa, Finland.
| | - Shuangxi Li
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, PR China
| | - Tianyi Hu
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, PR China
| | - Ruoyu Chu
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, PR China
| | - Fan Mo
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, PR China
| | - Dan Hu
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, PR China
| | - Chenchen Liu
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, PR China
| | - Bin Li
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, and Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, PR China
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50
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