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Belachqer-El Attar S, Morillas-España A, Sánchez-Zurano A, Pessôa LC, Pinna-Hernández MG, de Jesus Assis D, López JLC, Acién G. Influence of culture media composition on the rheology of microalgae concentrates on a large scale. N Biotechnol 2023; 77:90-99. [PMID: 37532220 DOI: 10.1016/j.nbt.2023.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/16/2023] [Accepted: 07/30/2023] [Indexed: 08/04/2023]
Abstract
The role of microalgae in the production of bioproducts and biofuels, along with their ability to provide a sustainable pathway for wastewater treatment, makes them promising alternatives to conventional processes. Nevertheless, large-scale downstream processing requires an understanding of biomass rheology that needs to be addressed further. This study aimed to characterize microalgal concentrates rheologically in different culture media. The presence of bacteria was quantified by photorespirometry and plate counting techniques. The culture medium was found to significantly influence viscosity, with primary wastewater exhibiting the highest viscosity and seawater plus pig slurry the lowest. The concentration of heterotrophic bacteria was directly related to the viscosity. Extracellular polysaccharides (EPS) in supernatant exhibited an inverse viscosity trend compared to biomass concentrates, with pig slurry cultures having higher concentrations. These findings emphasize the profound influence of culture medium and EPS on the rheology of microalgal biomass, underscoring the need for continued research aimed at facilitating and optimizing large-scale downstream processes within the framework of a circular economy and the attainment of the Sustainable Development Goals (6,8, and 12).
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Affiliation(s)
- Solaima Belachqer-El Attar
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain.
| | - Ainoa Morillas-España
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Ana Sánchez-Zurano
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Luiggi Cavalcanti Pessôa
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil; Senai Cimatec University Center, Environment Department, Salvador, Brazil
| | - María Guadalupe Pinna-Hernández
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Denilson de Jesus Assis
- Graduate Program in Chemical Engineering (PPEQ), Polytechnic School, Federal University of Bahia, Salvador, Brazil; School of Exact and Technological Sciences, University Salvador, Salvador, Bahia, Brazil
| | - José Luis Casas López
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
| | - Gabriel Acién
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; Solar Energy Research Centre (CIESOL), 04120 Almería, Spain
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2
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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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3
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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: 0] [Impact Index Per Article: 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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4
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Yu Q, Pei X, Wei Y, Naveed S, Wang S, Chang M, Zhang C, Ge Y. The roles of bacteria in resource recovery, wastewater treatment and carbon fixation by microalgae-bacteria consortia: A critical review. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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5
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Segredo-Morales E, González-Martín C, Vera L, González E. Performance of a novel rotating membrane photobioreactor based on indigenous microalgae-bacteria consortia for wastewater reclamation. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Improvement of microbial extracellular electron transfer via outer membrane cytochromes expression of engineered bacteria. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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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: 0] [Impact Index Per Article: 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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8
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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: 1] [Impact Index Per Article: 0.5] [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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9
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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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10
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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: 60] [Impact Index Per Article: 20.0] [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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11
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Nandy S, Arora U, Tarar P, Viggor S, Jõesaar M, Kivisaar M, Kapley A. Monitoring the growth, survival and phenol utilization of the fluorescent-tagged Pseudomonas oleovorans immobilized and free cells. BIORESOURCE TECHNOLOGY 2021; 338:125568. [PMID: 34274579 DOI: 10.1016/j.biortech.2021.125568] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/09/2021] [Accepted: 07/10/2021] [Indexed: 06/13/2023]
Abstract
Bioaugmentation in wastewater treatment plants (WWTPs) is challenging due to low survival and persistence of applied microbes. This study aimed to track the capacity and survival of fluorescent-tagged Pseudomonas oleovoransICTN13 as a model organism applicable in bioaugmentation of phenol-containing wastewater. The isolate was immobilized in alginate biopolymer, and enhanced efficacy and survival for biodegradation of phenol against free cells were studied. Encapsulated cells resulted in enhanced phenol removal efficiency (~94%) compared to free cells (~72%). Encapsulation of cells facilitated an extended storage time of 30 days. Remarkably, phenol and COD removal efficacy of encapsulated cells was sustained up to ~ 92-93% in a reactor after 45 days, while free cells could produce ~ 80-84% removal efficiency. Fluorescence microscopy showed high survival of the encapsulated cells, whereas gradual deterioration of free cells was observed. Thus, the findings highlight the importance of bio augmented strain in WWTPs where encapsulation is a crucial factor.
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Affiliation(s)
- Sampurna Nandy
- Director's Research Cell, CSIR-National Environmental Engineering Research Institute, Nagpur 440020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Upasana Arora
- Director's Research Cell, CSIR-National Environmental Engineering Research Institute, Nagpur 440020, India
| | - Pranay Tarar
- Director's Research Cell, CSIR-National Environmental Engineering Research Institute, Nagpur 440020, India
| | - Signe Viggor
- Institute of Molecular and Cell Biology, University of Tartu, Tartu 51010, Estonia
| | - Merike Jõesaar
- Institute of Molecular and Cell Biology, University of Tartu, Tartu 51010, Estonia
| | - Maia Kivisaar
- Institute of Molecular and Cell Biology, University of Tartu, Tartu 51010, Estonia
| | - Atya Kapley
- Director's Research Cell, CSIR-National Environmental Engineering Research Institute, Nagpur 440020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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12
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Leng L, Li W, Chen J, Leng S, Chen J, Wei L, Peng H, Li J, Zhou W, Huang H. Co-culture of fungi-microalgae consortium for wastewater treatment: A review. BIORESOURCE TECHNOLOGY 2021; 330:125008. [PMID: 33773267 DOI: 10.1016/j.biortech.2021.125008] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/11/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
The treatment of wastewater by microalgae has been studied and proved to be effective through previous studies. Due to the small size of microalgae, how to efficiently harvest microalgae from wastewater is a crucial factor restricting the development of algal technologies. Fungi-assisted microalgae bio-flocculation for microalgae harvesting and wastewater treatment simultaneously, which was overlooked previously, has attracted increasing attention in the recent decade due to its low cost and high efficiency. This review found that fungal hyphae and microalgae can stick together due to electrostatic neutralization, surface protein interaction, and exopolysaccharide adhesion in the co-culture process, realizing co-pelletization of microalgae and fungi, which is conducive to microalgae harvesting. Besides, the combination of fungi and microalgae has a complementary effect on pollutant removal from wastewaters. The co-culture of fungi-microalgae has excellent development prospects with both environmental and economic benefits, and it is expected to be applied on an industrial scale.
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Affiliation(s)
- Lijian Leng
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Wenting Li
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources, Environmental & Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Jie Chen
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources, Environmental & Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Songqi Leng
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources, Environmental & Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Jiefeng Chen
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources, Environmental & Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Liang Wei
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources, Environmental & Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Haoyi Peng
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Jun Li
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources, Environmental & Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Wenguang Zhou
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources, Environmental & Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Huajun Huang
- School of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China.
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13
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Fallahi A, Rezvani F, Asgharnejad H, Khorshidi Nazloo E, Hajinajaf N, Higgins B. Interactions of microalgae-bacteria consortia for nutrient removal from wastewater: A review. CHEMOSPHERE 2021; 272:129878. [PMID: 35534965 DOI: 10.1016/j.chemosphere.2021.129878] [Citation(s) in RCA: 106] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 05/09/2023]
Abstract
Nitrogen and phosphorus pollution can cause eutrophication, resulting in ecosystem disruption. Wastewater treatment systems employing microalgae-bacteria consortia have the potential to enhance the nutrient removal efficiency from wastewater through mutual interaction and synergetic effects. The knowledge and control of the mechanisms involved in microalgae-bacteria interaction could improve the system's ability to transform and recover nutrients. In this review, a critical evaluation of recent literature was carried out to synthesize knowledge related to mechanisms of interaction between microalgae and bacteria consortia for nutrient removal from wastewater. It is now established that microalgae can produce oxygen through photosynthesis for bacteria and, in turn, bacteria supply the required metabolites and inorganic carbon source for algae growth. Here we highlight how the interaction between microalgae and bacteria is highly dependent on the nitrogen species in the wastewater. When the nitrogen source is ammonium, the generated oxygen by microalgae has a positive influence on nitrifying bacteria. When the nitrogen source is nitrate, the oxygen can have an inhibitory effect on denitrifying bacteria. However, some strains of microalgae have the capability to supply hydrogen gas for hydrogenotrophic denitrifiers as an energy source. Recent literature on biogranulation of microalgae and bacteria and its application for nutrient removal and biomass recovery is also discussed as a promising approach. Significant research challenges remain for the integration of microalgae-bacteria consortia into wastewater treatment processes including microbial community control and process stability over long time horizons.
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Affiliation(s)
- Alireza Fallahi
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Fariba Rezvani
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran.
| | - Hashem Asgharnejad
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Ehsan Khorshidi Nazloo
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Nima Hajinajaf
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran; Chemical Engineering Program, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ, USA
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14
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Asgharnejad H, Sarrafzadeh MH, Abhar-Shegofteh O, Khorshidi Nazloo E, Oh HM. Biomass quantification and 3-D topography reconstruction of microalgal biofilms using digital image processing. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102243] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Su H, Zhang D, Antwi P, Xiao L, Deng X, Liu Z, Long B, Shi M, Manefield MJ, Ngo HH. Exploring potential impact(s) of cerium in mining wastewater on the performance of partial-nitrification process and nitrogen conversion microflora. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 209:111796. [PMID: 33341697 DOI: 10.1016/j.ecoenv.2020.111796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 12/06/2020] [Accepted: 12/08/2020] [Indexed: 06/12/2023]
Abstract
Cerium Ce(III) is one of the major pollutants contained in wastewater generated during Ce(III) mining. However, the effect(s) of Ce(III) on the functional genera responsible for removing nitrogen biologically from wastewater has not been studied and reported. In this study, the effects of Ce(III) on aspects of partial-nitritation-(PN) process including ammonia oxidation rate (AOR), process kinetics, and microbial activities were investigated. It was found that the effect of dosing Ce(III) in the PN system correlated strongly with the AOR. Compared to the control, batch assays dosed with 5 mg/L Ce(III) showed elevated PN efficiency of about 121%, an indication that maximum biological response was feasible upon Ce(III) dose. It was also found that, PN performance was not adversely affected, given that Ce(III) dose was ≤20 mg/L. Process kinetics investigated also suggested that the maximum Ce(III) dose without any visible inhibition to the activities of ammonium oxidizing bacteria was 1.37 mg/L, but demonstrated otherwise when Ce(III) dose exceeded 5.63 mg/L. Compared to the control, microbes conducted efficient Ce(III) removal (averaged 98.66%) via biosorption using extracellular polymeric substances (EPS). Notably, significant deposits of Ce(III) was found within the EPS produced as revealed by SEM, EDX, CLSM and FTIR. 2-dimensional correlation infrared-(2DCOS-IR) revealed ester group (uronic acid) as a major organic functional group that promoted Ce(III) removal. Excitation-emission matrix-(EEM) spectrum and 2DCOS-IR suggested the dominance of Fulvic acid, hypothesized to have promoted the performance of the PN process under Ce(III) dosage.
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Affiliation(s)
- Hao Su
- Jiangxi University of Science and Technology, School of Resources & Environmental Engineering, Ganzhou 341000, Jiangxi, PR China
| | - Dachao Zhang
- Jiangxi University of Science and Technology, School of Resources & Environmental Engineering, Ganzhou 341000, Jiangxi, PR China.
| | - Philip Antwi
- Jiangxi University of Science and Technology, School of Resources & Environmental Engineering, Ganzhou 341000, Jiangxi, PR China; University of Southern Queensland, School of Civil and Electrical Engineering, Darling Heights, Toowoomba, QLD 4350, Australia.
| | - Longwen Xiao
- Jiangxi University of Science and Technology, School of Resources & Environmental Engineering, Ganzhou 341000, Jiangxi, PR China
| | - Xiaoyu Deng
- Jiangxi University of Science and Technology, School of Resources & Environmental Engineering, Ganzhou 341000, Jiangxi, PR China
| | - Zuwen Liu
- Jiangxi University of Science and Technology, School of Resources & Environmental Engineering, Ganzhou 341000, Jiangxi, PR China
| | - Bei Long
- Jiangxi University of Science and Technology, School of Resources & Environmental Engineering, Ganzhou 341000, Jiangxi, PR China
| | - Miao Shi
- Ganzhou Eco-Environmental Engineering Investment Company Limited, Ganzhou 341000, Jiangxi, China
| | - Michael J Manefield
- University of New South Wales, School of Civil and Environmental Engineering, Water Research Centre, Sydney, NSW 2052, Australia
| | - Huu Hao Ngo
- University of Technology Sydney, Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, Sydney, NSW 2007, Australia
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16
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Park CY, Chun SJ, Jin C, Le VV, Cui Y, Kim SY, Ahn CY, Oh HM. Tabrizicola algicola sp. nov. isolated from culture of microalga Ettlia sp. Int J Syst Evol Microbiol 2020; 70:6133-6141. [PMID: 33052083 DOI: 10.1099/ijsem.0.004508] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel Gram-stain-negative, aerobic, non-spore-forming, non-motile, and rod-shaped bacterium, strain ETT8T was isolated from a chemostat culture of microalga Ettlia sp. YC001. Optimal growth was with 0-2% NaCl and at 25-37 °C on R2A medium. Phylogenetic analysis based on the 16S rRNA gene and genome sequence showed that strain ETT8T belongs to the genus Tabrizicola, with the close neighbours being T. sediminis DRYC-M-16T (98.1 %), T. alkalilacus DJCT (97.6 %), T. fusiformis SY72T (96.9 %), T. piscis K13M18T (96.8 %), and T. aquatica RCRI19T (96.5 %). The genomic comparison of strain ETT8T with type species in the genus Tabrizicola was analysed using the genome-to-genome distance calculator (GGDC), average nucleotide identity (ANI), and average amino acid identity (AAI) (values indicated ≤17.7, ≤75.4 and ≤71.9 %, respectively). The genomic DNA G+C content of strain ETT8T was 64.4 %, plus C18 : 1 ω6c and C18 : 0-iso were the major fatty acids and Q-10 the major respiratory quinone. Strain ETT8T contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine aminolipid, and four unidentified lipids as the major polar lipids. Based on the chemotaxonomic, genotypic, and phenotype results, strain ETT8T was recognized as a novel species of the genus Tabrizicola for which the name Tabrizicola algicola sp. nov. is proposed. The type strain is ETT8T (=KCTC 72206T=JCM 31893T=MCC 4339T).
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Affiliation(s)
- Chan-Yeong Park
- Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea.,Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Seong-Jun Chun
- National Institute of Ecology, 1210 Geumgang-ro, Maseo-myeon, Seocheon-gun 33657, Republic of Korea
| | - Chunzhi Jin
- Industrial Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Ve Van Le
- Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea.,Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Yingshun Cui
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Song-Yeon Kim
- Department of Microbiology and Resources, College of Science and Technology, Mokwon University, 88 Doanbuk-ro, Seo-Gu, Daejeon 35349, Republic of Korea
| | - Chi-Yong Ahn
- Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.,Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Hee-Mock Oh
- Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea.,Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
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17
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Shilei Z, Yue S, Tinglin H, Ya C, Xiao Y, Zizhen Z, Yang L, Zaixing L, Jiansheng C, Xiao L. Reservoir water stratification and mixing affects microbial community structure and functional community composition in a stratified drinking reservoir. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 267:110456. [PMID: 32421660 DOI: 10.1016/j.jenvman.2020.110456] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 03/02/2020] [Accepted: 03/16/2020] [Indexed: 06/11/2023]
Abstract
To investigate how the aquatic bacterial community of a stratified reservoir drives the evolution of water parameters, the microbial community structure and network characteristics of bacteria in a stratified reservoir were investigated using Illumina MiSeq sequencing technology. A total of 42 phyla and 689 distinct genera were identified, which showed significant seasonal variation. Additionally, stratified variations in the bacterial community strongly reflected the vertical gradient and seasonal changes in water temperature, dissolved oxygen, and nutrition concentration. Furthermore, principal coordinate analysis indicated that most microorganisms were likely influenced by changes in water stratification conditions, exhibiting significant differences during the stratification period and mixing period based on Adonis, MRPP, and Anosim. Compared to the stratification period, 123 enhanced operational taxonomic units (OTUs; 29%) and 226 depleted OTUs (52%) were identified during the mixing period. Linear discriminant analysis effect size results showed that 15 major genera were enriched in the mixing period and 10 major genera were enriched in the stratification period. Importantly, network analysis revealed that the keystone species belonged to hgcI_clade, CL500-29, Acidibacter, Paucimonas, Flavobacterium, Prochlorothrix, Xanthomonadales, Chloroflexia, Burkholderiales, OPB56, KI89A_clade, Synechococcus, Caulobacter or were unclassified. Redundancy analysis showed that temperature, dissolved oxygen, pH, chlorophyll-α, total phosphorus, nitrate, and ammonia were important factors influencing the water bacterial community and function composition, which were consistent with the results of the Mantel test analysis. Furthermore, random forest analysis showed that temperature, dissolved oxygen, ammonia, and total dissolved phosphorous were the most important variables predicting water bacterial community and function community α- and β-diversity (P < 0.05). Overall, these results provide insight into the interactions between the microbial community and water quality evolution mechanism in Zhoucun reservoir.
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Affiliation(s)
- Zhou Shilei
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, PR China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China
| | - Sun Yue
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, PR China
| | - Huang Tinglin
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China.
| | - Cheng Ya
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China
| | - Yang Xiao
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China; Northwest Engineering Corporation Limited the Power Construction Corporation of China, PR China
| | - Zhou Zizhen
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China; School of Energy and Environment, Zhongyuan University of Technology, Zhengzhou, 450007, PR China
| | - Li Yang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China; School of Energy and Environment, Zhongyuan University of Technology, Zhengzhou, 450007, PR China
| | - Li Zaixing
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, PR China
| | - Cui Jiansheng
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, PR China
| | - Luo Xiao
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, PR China
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18
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Zhou S, Sun Y, Zhang Y, Huang T, Zhou Z, Li Y, Li Z. Pollutant removal performance and microbial enhancement mechanism by water-lifting and aeration technology in a drinking water reservoir ecosystem. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 709:135848. [PMID: 31905546 DOI: 10.1016/j.scitotenv.2019.135848] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 11/27/2019] [Accepted: 11/28/2019] [Indexed: 06/10/2023]
Abstract
Here, the performance and mechanism of pollutant removal in the Zhoucun reservoir by water-lifting and aeration systems (WLAs) were explored. The hypolimnion anoxic layer disappeared and the reservoir was mixed after the WLAs were operated for approximately 35 days, providing a suitable environment for pollutant removal. Operation of the system enhanced the metabolic activity of the water microbes and their capacity for purification, which contributed to the removal of nitrogen, organic carbon, Fe, Mn, P, and S. Specifically, the total N concentration decreased from 2.55 to 0.48 mg/L, showing an 81.18% removal rate. Microbial metabolism and the diversity index increased following the operation of the WLAs in the Zhoucun Reservoir. Furthermore, the water reservoir clearly inhibited the performance of Fe, Mn, P, and S through the WLA operation, meeting the requirements for class III based on the Chinese Surface Water Environmental Quality Standard (GB3838-2002). High-throughput sequencing analysis revealed increased levels of indicator and keystone operational taxonomic units belonging to Flavobacterium, hgcI_clade, Rheinheimera, Dechloromonas, Pseudomonas, and Rhodocyclaceae, which are related to the degradation of organic carbon and removal of nitrogen and phosphorus. Moreover, total N, ammonia, total P, dissolved oxygen, temperature, and pH were the principal factors affecting the microbial community based on redundancy analysis and the Mantel test. Furthermore, network analysis showed that symbiotic relationships accounted for the major proportion of the microbial network. Our results provide a theoretical foundation for the efficiency of N removal and essential technical support for improving the self-repair capacity of water in drinking water reservoirs.
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Affiliation(s)
- Shilei Zhou
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China
| | - Yue Sun
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Yiran Zhang
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Tinglin Huang
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China.
| | - Zizhen Zhou
- School of Energy and Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Yang Li
- School of Energy and Environment, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Zaixing Li
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
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19
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Li D, Zhang S, Li S, Zeng H, Zhang J. Aerobic granular sludge operation and nutrients removal mechanism in a novel configuration reactor combined sequencing batch reactor and continuous-flow reactor. BIORESOURCE TECHNOLOGY 2019; 292:122024. [PMID: 31450062 DOI: 10.1016/j.biortech.2019.122024] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/13/2019] [Accepted: 08/15/2019] [Indexed: 06/10/2023]
Abstract
A novel aerobic granular sludge (AGS) system called SBR (sequencing batch reactor)-CF (continuous-flow) system merging the advantages of sequencing batch reactors (SBRs) and continuous flow (CF) reactors was developed. The AGS was successfully operated in the SBR-CF system which consisted of four same SBRs (each served as settling tank/anaerobic feeding tank/aerobic reacting tank in turn). The effects of aeration intensity and hydraulic retention time (HRT) on the SBR-CF system were studied. The results showed strong aeration intensity (9.74 h-1 in this study) and appropriate HRT (9 h in this study) were more favorable to the nutrients removal. The EEM-PARAFAC analysis was applied to characterize the LB-EPS, TB-EPS and domestic wastewater, as results TB-EPS was found play an important role in the biosorption in COD removal of the SBR-CF system. In addition, a preliminary conceptual reaction process model in the SBR-CF system was built using high-throughput pyrosequencing and phylogenetic assignment.
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Affiliation(s)
- Dong Li
- Key Laboratory of Water Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100123, China.
| | - Shirui Zhang
- Key Laboratory of Water Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100123, China
| | - Shuai Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Huiping Zeng
- Key Laboratory of Water Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100123, China
| | - Jie Zhang
- Key Laboratory of Water Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100123, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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