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Shi K, Xu JM, Cui HL, Cheng HY, Liang B, Wang AJ. Microbiome regulation for sustainable wastewater treatment. Biotechnol Adv 2024; 77:108458. [PMID: 39343082 DOI: 10.1016/j.biotechadv.2024.108458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 08/30/2024] [Accepted: 09/26/2024] [Indexed: 10/01/2024]
Abstract
Sustainable wastewater treatment is essential for attaining clean water and sanitation, aligning with UN Sustainable Development Goals. Wastewater treatment plants (WWTPs) have utilized environmental microbiomes in biological treatment processes in this effort for over a century. However, the inherent complexity and redundancy of microbial communities, and emerging chemical and biological contaminants, challenge the biotechnology applications. Over the past decades, understanding and utilization of microbial energy metabolism and interaction relationships have revolutionized the biological system. In this review, we discuss how microbiome regulation strategies are being used to generate actionable performance for low-carbon pollutant removal and resource recovery in WWTPs. The engineering application cases also highlight the real feasibility and promising prospects of the microbiome regulation approaches. In conclusion, we recommend identifying environmental risks associated with chemical and biological contaminants transformation as a prerequisite. We propose the integration of gene editing and enzyme design to precisely regulate microbiomes for the synergistic control of both chemical and biological risks. Additionally, the development of integrated technologies and engineering equipment is crucial in addressing the ongoing water crisis. This review advocates for the innovation of conventional wastewater treatment biotechnology to ensure sustainable wastewater treatment.
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Affiliation(s)
- Ke Shi
- State Key Laboratory of Urban Water Resource and Environment, School of Civil & Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Jia-Min Xu
- State Key Laboratory of Urban Water Resource and Environment, School of Civil & Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Han-Lin Cui
- State Key Laboratory of Urban Water Resource and Environment, School of Civil & Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Hao-Yi Cheng
- State Key Laboratory of Urban Water Resource and Environment, School of Civil & Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Bin Liang
- State Key Laboratory of Urban Water Resource and Environment, School of Civil & Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China.
| | - Ai-Jie Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Civil & Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China.
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2
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He L, Zhu G. Regulation and application of quorum sensing on anaerobic digestion system. CHEMOSPHERE 2024; 363:142983. [PMID: 39089336 DOI: 10.1016/j.chemosphere.2024.142983] [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: 06/30/2024] [Revised: 07/29/2024] [Accepted: 07/29/2024] [Indexed: 08/03/2024]
Abstract
Quorum sensing (QS) plays an important role in the social behavior of microbial communities. Anaerobic digestion (AD) is a biological process using anaerobic microorganisms to degrade organic macromolecules into small molecules for biogas and biofertilizer production. In AD, the QS signaling molecule N-acyl homoserine lactones (AHLs) induces bacterial metabolism, improving AD process efficiency. However, there are fewer systematic reports about QS regulation of microbial behavior in AD. In this report, the effects of signaling molecules on extracellular polymer secretion, biofilm formation, granulation of granular sludge and bacterial metabolism in AD were investigated in detail. At present, the regulation behavior of QS on AD is a group phenomenon, and there are few in-depth studies on the regulation pathway. Therefore, we conducted an in-depth analysis of the pure culture system, granular sludge and reactor in the AD. Then we pointed out that the future application potential of QS in the AD may be combined with quorum quenching (QQ) and omics technology, which is of great significance for the future application of AD.
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Affiliation(s)
- Liyan He
- School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, PR China
| | - Gefu Zhu
- School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, PR China.
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3
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Xiong F, Dai T, Zheng Y, Wen D, Li Q. Enhanced AHL-mediated quorum sensing accelerates the start-up of biofilm reactors by elevating the fitness of fast-growing bacteria in sludge and biofilm communities. WATER RESEARCH 2024; 257:121697. [PMID: 38728787 DOI: 10.1016/j.watres.2024.121697] [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: 01/10/2024] [Revised: 04/16/2024] [Accepted: 04/29/2024] [Indexed: 05/12/2024]
Abstract
Quorum sensing (QS)-based manipulations emerge as a promising solution for biofilm reactors to overcome challenges from inefficient biofilm formation and lengthy start-ups. However, the ecological mechanisms underlying how QS regulates microbial behaviors and community assembly remain elusive. Herein, by introducing different levels of N-acyl-homoserine lactones, we manipulated the strength of QS during the start-up of moving bed biofilm reactors and compared the dynamics of bacterial communities. We found that enhanced QS elevated the fitness of fast-growing bacteria with high ribosomal RNA operon (rrn) copy numbers in their genomes in both the sludge and biofilm communities. This led to notably increased extracellular substance production, as evidenced by strong positive correlations between community-level rrn copy numbers and extracellular proteins and polysaccharides (Pearson's r = 0.529-0.830, P < 0.001). Network analyses demonstrated that enhanced QS significantly promoted the ecological interactions among taxa, particularly cooperative interactions. Bacterial taxa with higher network degrees were more strongly correlated with extracellular substances, suggesting their crucial roles as public goods in regulating bacterial interactions and shaping network structures. However, the assembly of more cooperative communities in QS-enhanced reactors came at the cost of decreased network stability and modularity. Null model and dissimilarity-overlap curve analysis revealed that enhanced QS strengthened stochastic processes in community assembly and rendered the universal population dynamics more convergent. Additionally, these shaping effects were consistent for both the sludge and biofilm communities, underpinning the planktonic-to-biofilm transition. This work highlights that QS manipulations efficiently drive community assembly and confer specialized functional traits to communities by recruiting taxa with specific life strategies and regulating interspecific interactions. These ecological insights deepen our understanding of the rules governing microbial societies and provide guidance for managing engineering ecosystems.
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Affiliation(s)
- Fuzhong Xiong
- College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Tianjiao Dai
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Yuhan Zheng
- College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Donghui Wen
- College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
| | - Qilin Li
- Department of Civil and Environmental Engineering, Rice University, Houston, TX 77005, USA
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4
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Wang X, Yi K, Pang H, Liu Z, Li X, Zhang W, Zhang C, Liu S, Huang J, Zhang C. An overview of quorum sensing in shaping activated sludge forms: Mechanisms, applications and challenges. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:171886. [PMID: 38531459 DOI: 10.1016/j.scitotenv.2024.171886] [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: 01/16/2024] [Revised: 02/29/2024] [Accepted: 03/20/2024] [Indexed: 03/28/2024]
Abstract
Activated sludge method is an effective method for the wastewater treatment and has been widely applied. Activated sludge usually exists in various forms such as activated sludge floc, biofilm and granule. Due to the different character and function for each sludge type, the role and mechanism in the wastewater treatment process are also different, but all were crucial. The quorum sensing (QS) /quorum quenching (QQ) have been demonstrated and proved to regulate the group behavior by secreting signaling molecules among microorganisms and thus affect the manifestation of sludge. However, the complex mechanisms and regulatory strategies of QS/QQ in sludge forms have not been systematically summarized. This review provided an overview on the mechanism of QS/QQ shaping sludge forms from macro to micro (Explore it through signaling molecules, extracellular polymeric substances and microorganisms). In addition, the application and challenges of QS/QQ regulating sludge forms in various wastewater treatment processes including biofilm batch reactor, granule sludge and membrane bioreactor were discussed. Finally, some suggestions for further research and development of effective and economical QS/QQ strategies are put forward.
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Affiliation(s)
- Xia Wang
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Kaixin Yi
- College of Materials and Environmental Engineering, Changsha University, Changsha 410003, China
| | - Haoliang Pang
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Zhexi Liu
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Xue Li
- Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, China
| | - Wei Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Chenyu Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Si Liu
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Jinhui Huang
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
| | - Chen Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
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5
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Cui X, He J, Chu Z, Ruan X, Jiang Z, Jiang W, Xin X, Pang H, Zou X. Effects of exogenous N-acyl homoserine lactones (AHLs) on methanogenic activities and microbial community differences during anaerobic digestion. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 355:120449. [PMID: 38432012 DOI: 10.1016/j.jenvman.2024.120449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 02/02/2024] [Accepted: 02/20/2024] [Indexed: 03/05/2024]
Abstract
N-acyl homoserine lactones (AHLs) function as signaling molecules influencing microbial community dynamics. This study investigates the impact of exogenously applied AHLs on methane production during waste-activated sludge (WAS) anaerobic digestion (AD). Nine AHL types, ranging from 10-4 to 10 μg/g VSS, were applied, comparing microbial community composition under optimal AHL concentrations. Firmicutes, Bacteroidetes, Chloroflexi, and Proteobacteria were identified in anaerobic digesters with C4-HSL, C6-HSL, and C8-HSL. Compared to the control, Halobacterota increased by 19.25%, 20.87%, and 9.33% with C7-HSL, C10-HSL, and C12-HSL. Exogenous C7-HSL enhanced the relative abundance of Methanosarcina, Romboutsia, Sedimentibacter, Proteiniclasticum, Christensenellaceae_R-7_group. C10-HSL increased Methanosarcina abundance. C4-HSL, C6-HSL, C8-HSL, C10-HSL, and C12-HSL showed potential to increase unclassified_Firmicutes. Functional Annotation of Prokaryotic Taxa (FAPROTAX) predicted AHLs' impact on related functional genes, providing insights into their role in AD methanogenesis regulation. This study aimed to enhance the understanding of the influence of different types of exogenous AHLs on AD and provide technical support for regulating the methanogenesis efficiency of AD by exogenous AHLs.
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Affiliation(s)
- Xinxin Cui
- School of Civil Engineering, Guangzhou University, 230 Zhonghuan West Road, Guangzhou 510006, China.
| | - Junguo He
- School of Civil Engineering, Guangzhou University, 230 Zhonghuan West Road, Guangzhou 510006, China.
| | - Zhaorui Chu
- School of Civil Engineering, Guangzhou University, 230 Zhonghuan West Road, Guangzhou 510006, China
| | - Xian Ruan
- School of Civil Engineering, Guangzhou University, 230 Zhonghuan West Road, Guangzhou 510006, China
| | - Zhifeng Jiang
- School of Civil Engineering, Guangzhou University, 230 Zhonghuan West Road, Guangzhou 510006, China
| | - Weixun Jiang
- School of Civil Engineering, Guangzhou University, 230 Zhonghuan West Road, Guangzhou 510006, China
| | - Xiaodong Xin
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, 1 Daxue Road, Dongguan 523808, China
| | - Heliang Pang
- School of Environmental and Municipal Engineering, Xi 'an University of Architecture and Technology, 13 Yanta Road Middle Section, Xi 'an 710055, China
| | - Xiang Zou
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China
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Anburajan P, Cayetano RD, Prohim YM, Thau NT, Kim S, Kim H, Ko JH, Oh HS. Role of quorum sensing and quorum quenching in anaerobic digestion: A scoping review. ENVIRONMENTAL RESEARCH 2023; 239:117413. [PMID: 37839533 DOI: 10.1016/j.envres.2023.117413] [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: 09/13/2023] [Revised: 10/06/2023] [Accepted: 10/13/2023] [Indexed: 10/17/2023]
Abstract
Anaerobic digestion (AD) is a biological process that employs anaerobic microorganisms to degrade organic material, yielding biogas and biofertilizers. Understanding quorum sensing (QS) signaling in mixed microbial systems provides valuable insights into microbial behavior and functions. This review aims to examine recent studies on the roles of QS and QQ in the AD processes. A QS signal molecule, N-acyl homoserine lactone (AHL), induce the production of extraceluller polymers, promoting biofilm formation and bacterial aggregation, thereby the efficiency of AD process. QS-assisted granule formation fosters syntrophy between acetogens and methanogens, leading to increased organic removal and methane production. Specific AHLs were shown to be correlated with the abundance of hydrolytic bacteria and acidogens, further benefiting methane production. QQ was shown to effectively control membrane fouling in anaerobic membrane bioreactors, yet its impact on methane productivity remains unclear. This review shed lights on the existing literature gaps regarding the mechanisms of QS and QQ in AD systems, which will play a vital role in advancing AD applications in the future.
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Affiliation(s)
- Parthiban Anburajan
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, South Korea; Institute of Environmental Technology, Seoul National University of Science and Technology, Seoul, South Korea
| | - Roent Dune Cayetano
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, South Korea; Institute of Environmental Technology, Seoul National University of Science and Technology, Seoul, South Korea
| | - You Mit Prohim
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, South Korea
| | - Nguyen Tang Thau
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, South Korea
| | - Sungmi Kim
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, South Korea
| | - Hyeok Kim
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, South Korea
| | - Je Hyeon Ko
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, South Korea
| | - Hyun-Suk Oh
- Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, South Korea; Institute of Environmental Technology, Seoul National University of Science and Technology, Seoul, South Korea.
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Bhatt P, Bhatt K, Huang Y, Li J, Wu S, Chen S. Biofilm formation in xenobiotic-degrading microorganisms. Crit Rev Biotechnol 2023; 43:1129-1149. [PMID: 36170978 DOI: 10.1080/07388551.2022.2106417] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 06/26/2022] [Indexed: 11/03/2022]
Abstract
The increased presence of xenobiotics affects living organisms and the environment at large on a global scale. Microbial degradation is effective for the removal of xenobiotics from the ecosystem. In natural habitats, biofilms are formed by single or multiple populations attached to biotic/abiotic surfaces and interfaces. The attachment of microbial cells to these surfaces is possible via the matrix of extracellular polymeric substances (EPSs). However, the molecular machinery underlying the development of biofilms differs depending on the microbial species. Biofilms act as biocatalysts and degrade xenobiotic compounds, thereby removing them from the environment. Quorum sensing (QS) helps with biofilm formation and is linked to the development of biofilms in natural contaminated sites. To date, scant information is available about the biofilm-mediated degradation of toxic chemicals from the environment. Therefore, we review novel insights into the impact of microbial biofilms in xenobiotic contamination remediation, the regulation of biofilms in contaminated sites, and the implications for large-scale xenobiotic compound treatment.
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Affiliation(s)
- Pankaj Bhatt
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, PR China
- Department of Agricultural & Biological Engineering, Purdue University, West Lafayette, IN, USA
| | - Kalpana Bhatt
- Department of Food Science, Purdue University, West Lafayette, IN, USA
| | - Yaohua Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, PR China
| | - Jiayi Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, PR China
| | - Siyi Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, PR China
| | - Shaohua Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, PR China
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Lv L, Chen J, Liu X, Gao W, Sun L, Wang P, Ren Z, Zhang G, Li W. Roles and regulation of quorum sensing in anaerobic granular sludge: Research status, challenges, and perspectives. BIORESOURCE TECHNOLOGY 2023; 387:129644. [PMID: 37558106 DOI: 10.1016/j.biortech.2023.129644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 07/31/2023] [Accepted: 08/05/2023] [Indexed: 08/11/2023]
Abstract
Anaerobic granular sludge (AnGS) has a complex and important internal microbial communication system due to its unique microbial layered structure. As a concentration-dependent communication system between bacterial cells through signal molecules, QS (quorum sensing) is widespread in AnGS and exhibits great potential to regulate microbial behaviors. Therefore, the universal functions of QS in AnGS have been systematically summarized in this paper, including the influence on the metabolic activity, physicochemical properties, and microbial community of AnGS. Subsequently, the common QS-based AnGS regulation approaches are reviewed and analyzed comprehensively. The regulation mechanism of QS in AnGS is analyzed from two systems of single bacterium and mixed bacteria. This review can provide a comprehensive understanding of QS functions in AnGS systems, and promote the practical application of QS-based strategies in optimization of AnGS treatment process.
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Affiliation(s)
- Longyi Lv
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Jiarui Chen
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Xiaoyang Liu
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China.
| | - Wenfang Gao
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Li Sun
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Pengfei Wang
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Zhijun Ren
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Guangming Zhang
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Weiguang Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, PR China.
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Zeng X, Zou Y, Zheng J, Qiu S, Liu L, Wei C. Quorum sensing-mediated microbial interactions: Mechanisms, applications, challenges and perspectives. Microbiol Res 2023; 273:127414. [PMID: 37236065 DOI: 10.1016/j.micres.2023.127414] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 05/05/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023]
Abstract
Microbial community in natural or artificial environments playes critical roles in substance cycles, products synthesis and species evolution. Although microbial community structures have been revealed via culture-dependent and culture-independent approaches, the hidden forces driving the microbial community are rarely systematically discussed. As a mode of cell-to-cell communication that modifies microbial interactions, quorum sensing can regulate biofilm formation, public goods secretion, and antimicrobial substances synthesis, directly or indirectly influencing microbial community to adapt to the changing environment. Therefore, the current review focuses on microbial community in the different habitats from the quorum sensing perspective. Firstly, the definition and classification of quorum sensing were simply introduced. Subsequently, the relationships between quorum sensing and microbial interactions were deeply explored. The latest progressives regarding the applications of quorum sensing in wastewater treatment, human health, food fermentation, and synthetic biology were summarized in detail. Finally, the bottlenecks and outlooks of quorum sensing driving microbial community were adequately discussed. To our knowledge, this current review is the first to reveal the driving force of microbial community from the quorum sensing perspective. Hopefully, this review provides a theoretical basis for developing effective and convenient approaches to control the microbial community with quorum sensing approaches.
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Affiliation(s)
- Xiangyong Zeng
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Guizhou Provincial Key Laboratory of Fermentation and Biophomacy, Guizhou University, Guiyang 550025, China.
| | - Yunman Zou
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Guizhou Provincial Key Laboratory of Fermentation and Biophomacy, Guizhou University, Guiyang 550025, China
| | - Jia Zheng
- Wuliangye Yibin Co Ltd, No.150 Minjiang West Road, Yibin City 644007, China
| | - Shuyi Qiu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Guizhou Provincial Key Laboratory of Fermentation and Biophomacy, Guizhou University, Guiyang 550025, China
| | - Lanlan Liu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Guizhou Provincial Key Laboratory of Fermentation and Biophomacy, Guizhou University, Guiyang 550025, China
| | - Chaoyang Wei
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Guizhou Provincial Key Laboratory of Fermentation and Biophomacy, Guizhou University, Guiyang 550025, China
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10
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Liu J, Wang L, Lu D, Wu D, Zhang P, Zhou Y. Quorum quenching enhanced methane production in anaerobic systems - performance and mechanisms. WATER RESEARCH 2023; 235:119841. [PMID: 36913812 DOI: 10.1016/j.watres.2023.119841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 03/03/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
In our previous study, quorum quenching (QQ) bacteria can effectively enhance methane production in an anaerobic membrane bioreactor (AnMBR) while mitigating membrane biofouling. However, the mechanism of such enhancement is unclear. In this study, we analyzed the potential effects from separated hydrolysis, acidogenesis, acetogenesis and methanogenesis steps. The cumulative methane production improved by 26.13%, 22.54%, 48.70% and 44.93% at QQ bacteria dosage of 0.5, 1, 5 and 10 mg strain/g beads, respectively. It was found that the presence of QQ bacteria enhanced acidogenesis step resulting in higher volatile fatty acids (VFA) production, while it had no obvious influence on hydrolysis, acetogenesis and methanogenesis steps. The substrate (glucose) conversion efficiency in acidogenesis step was also accelerated (1.45 folds vs control within first eight hours). The abundance of hydrolytic fermentation gram-positive bacteria and several acidogenic bacteria, such as Hungateiclostridiaceae, was promoted in QQ amended culture, which enhanced VFA production and accumulation. Although the abundance of acetoclastic methanogen Methanosaeta reduced by 54.2% on the 1st day of QQ beads addition, the overall performance of methane production was not affected. This study revealed that QQ had a greater impact on the acidogenesis step in the anaerobic digestion process, though the microbial community in acetogenesis and methanogenesis steps was altered. This work can provide a theoretical basis for using QQ technology to slow down the rate of membrane biofouling in anaerobic membrane bioreactors while increasing methane production and maximizing economic benefits.
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Affiliation(s)
- Jianbo Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Li Wang
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Dan Lu
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Dan Wu
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Panyue Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China
| | - Yan Zhou
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore.
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11
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Chen X, Liu L, Bi Y, Meng F, Wang D, Qiu C, Yu J, Wang S. A review of anammox metabolic response to environmental factors: Characteristics and mechanisms. ENVIRONMENTAL RESEARCH 2023; 223:115464. [PMID: 36773633 DOI: 10.1016/j.envres.2023.115464] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/18/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Anaerobic ammonium oxidation (anammox) is a promising low carbon and economic biological nitrogen removal technology. Considering the anammox technology has been easily restricted by environmental factors in practical engineering applications, therefore, it is necessary to understand the metabolic response characteristics of anammox bacteria to different environmental factors, and then guide the application of the anammox process. This review presented the latest advances of the research progress of the effects of different environmental factors on the metabolic pathway of anammox bacteria. The effects as well as mechanisms of conventional environmental factors and emerging pollutants on the anammox metabolic processes were summarized. Also, the role of quorum sensing (QS) mediating the bacteria growth, gene expression and other metabolic process in the anammox system were also reviewed. Finally, interaction and cross-feeding mechanisms of microbial communities in the anammox system were discussed. This review systematically summarized the variations of metabolic mechanism response to the external environment and cross-feeding interactions in the anammox process, which would provide an in-depth understanding for the anammox metabolic process and a comprehensive guidance for future anammox-related metabolic studies and engineering applications.
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Affiliation(s)
- Xiaoying Chen
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin, 300384, China; Tianjin Key Laboratory of Aquatic Science and Technology, Jinjing Road 26, Tianjin, China
| | - Lingjie Liu
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin, 300384, China; Tianjin Key Laboratory of Aquatic Science and Technology, Jinjing Road 26, Tianjin, China
| | - Yanmeng Bi
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin, 300384, China; Tianjin Key Laboratory of Aquatic Science and Technology, Jinjing Road 26, Tianjin, China
| | - Fansheng Meng
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin, 300384, China; Tianjin Key Laboratory of Aquatic Science and Technology, Jinjing Road 26, Tianjin, China
| | - Dong Wang
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin, 300384, China; Tianjin Key Laboratory of Aquatic Science and Technology, Jinjing Road 26, Tianjin, China
| | - Chunsheng Qiu
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin, 300384, China; Tianjin Key Laboratory of Aquatic Science and Technology, Jinjing Road 26, Tianjin, China
| | - Jingjie Yu
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin, 300384, China; Tianjin Key Laboratory of Aquatic Science and Technology, Jinjing Road 26, Tianjin, China
| | - Shaopo Wang
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin, 300384, China; Tianjin Key Laboratory of Aquatic Science and Technology, Jinjing Road 26, Tianjin, China.
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12
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Mit Prohim Y, Cayetano RDA, Anburajan P, Tang Thau N, Kim S, Oh HS. Enhancement of biomethane recovery from batch anaerobic digestion by exogenously adding an N-acyl homoserine lactone cocktail. CHEMOSPHERE 2023; 312:137188. [PMID: 36400188 DOI: 10.1016/j.chemosphere.2022.137188] [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: 07/30/2022] [Revised: 10/24/2022] [Accepted: 11/05/2022] [Indexed: 06/16/2023]
Abstract
Biomethane recovered through anaerobic digestion (AD) is a renewable, sustainable, and cost-effective alternative energy source that has the potential to help address rising energy demands. Efficient bioconversion during AD depends on the symbiotic relationship between hydrolytic bacteria and methanogenic archaea. Interactions between microorganisms occur in every biological system via a phenomenon known as quorum sensing (QS), in which signaling molecules are simultaneously transmitted and detected as a mode of cell-to-cell communication. However, there's still a lack of understanding on how QS works in the AD system, where diverse bacteria and archaea interact in a complex manner. In this study, different concentrations (0.5 and 5 μM) of signaling molecules in the form of an N-acyl homoserine lactone cocktail (C6-, C8-, C10-, and 3-oxo-C6-HSL) were prepared and introduced into anaerobic batch reactors to clearly assess how QS affects AD systems. It was observed that the methane yield increased with the addition of AHLs: a 5 μM AHL cocktail improved the methane yield (341.9 mL/g-COD) compared to the control without AHLs addition (285.9 mL/g-COD). Meanwhile, evidence of improved microbial growth and cell aggregation was noticed in AHLs-supplemented systems. Our findings also show that exogenously adding AHLs alters the microbial community structure by increasing the overall bacterial and archaeal population counts while favoring the growth of the methanogenic archaea group, which is essential in biomethane synthesis.
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Affiliation(s)
- You Mit Prohim
- Department of Environmental Engineering, Seoul National University of Science & Technology, Seoul, 01811, Republic of Korea
| | - Roent Dune A Cayetano
- Department of Environmental Engineering, Seoul National University of Science & Technology, Seoul, 01811, Republic of Korea; Institute of Environmental Technology, Seoul National University of Science & Technology, Seoul, 01811, Republic of Korea
| | - Parthiban Anburajan
- Department of Environmental Engineering, Seoul National University of Science & Technology, Seoul, 01811, Republic of Korea; Institute of Environmental Technology, Seoul National University of Science & Technology, Seoul, 01811, Republic of Korea
| | - Nguyen Tang Thau
- Department of Environmental Engineering, Seoul National University of Science & Technology, Seoul, 01811, Republic of Korea
| | - Sungmi Kim
- Department of Environmental Engineering, Seoul National University of Science & Technology, Seoul, 01811, Republic of Korea
| | - Hyun-Suk Oh
- Department of Environmental Engineering, Seoul National University of Science & Technology, Seoul, 01811, Republic of Korea; Institute of Environmental Technology, Seoul National University of Science & Technology, Seoul, 01811, Republic of Korea.
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13
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Jachimowicz P, Jo YJ, Cydzik-Kwiatkowska A. Polyethylene microplastics increase extracellular polymeric substances production in aerobic granular sludge. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:158208. [PMID: 36028039 DOI: 10.1016/j.scitotenv.2022.158208] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/09/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Wastewater treatment plants act as microplastic (MPs) sinks and secondary MP pollution sources. Little is known about the effect of MPs on biomass and the efficiency of biological wastewater treatment. This study assessed the impact of polyethylene (PE) MPs concentrations (1, 10, 50 mg/L) in wastewater on biological conversions and extracellular polymeric substances (EPS) production (including alginate) in aerobic granular sludge (AGS). PE MPs did not worsen the efficiency of biological treatment but stimulated the production of EPS and alginate in AGS. The alginate content increased from 238.7 ± 4.4 mg/g MLSS in control to 441.6 ± 13.8 mg/g MLSS at the highest PE load in wastewater. The presence of MP changed AGS morphology and worsened the settling properties of biomass, causing biomass washout from the reactors. At the highest PE load in wastewater, the biomass concentration in the reactor effluent was over 2.8 times higher than in the control.
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Affiliation(s)
- Piotr Jachimowicz
- University of Warmia and Mazury in Olsztyn, Faculty of Geoengineering, Department of Environmental Biotechnology, 10-709 Olsztyn, Poland.
| | - Young-Jae Jo
- University of Warmia and Mazury in Olsztyn, Faculty of Geoengineering, Department of Environmental Biotechnology, 10-709 Olsztyn, Poland
| | - Agnieszka Cydzik-Kwiatkowska
- University of Warmia and Mazury in Olsztyn, Faculty of Geoengineering, Department of Environmental Biotechnology, 10-709 Olsztyn, Poland
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14
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Gao Z, Chen H, Wang Y, Lv Y. Advances in AHLs-mediated quorum sensing system in wastewater biological nitrogen removal: mechanism, function, and application. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:1927-1943. [PMID: 36315086 DOI: 10.2166/wst.2022.305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Biological nitrogen removal process is to convert organic nitrogen and ammonia nitrogen into nitrogen via a series of reactions by microorganisms, and is widely used in wastewater treatment for its costless, high-effective, secondary pollution-free characteristics. Quorum sensing (QS) is a communication mode for microorganisms to regulate bacteria's physiological behaviors in response to environmental changes. N-acyl-homoserine lactones (AHLs)-mediated QS system is widespread in nitrogen removal-related functional bacteria and promotes biological nitrogen removal performance by regulating bacteria behavior. Recently, there has been an increasingly investigated AHLs-mediated QS system in wastewater biological nitrogen removal process. Consequently, the AHLs-mediated QS system is considered a promising regulatory strategy in the biological nitrogen removal process. This article reviewed the QS mechanism in various nitrogen removal-related functional bacteria and analyzed its effect on biological nitrogen removal performance. Combined with the application research of the QS system for enhanced biological nitrogen removal, it further put forward some prospects and suggestions which are of practical significance in practical application.
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Affiliation(s)
- Zhixiang Gao
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China E-mail:
| | - Hu Chen
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030024, China
| | - Ying Wang
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China E-mail: ; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030024, China
| | - Yongkang Lv
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China E-mail: ; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030024, China
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15
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Huang S, Xu B, Ng TCA, He M, Shi X, Ng HY. Feasibility of implementing quorum quenching technology to mitigate membrane fouling in MBRs treating phenol-rich pharmaceutical wastewater: Application of Rhodococcus sp. BH4 and quorum quenching consortium. BIORESOURCE TECHNOLOGY 2022; 358:127389. [PMID: 35636678 DOI: 10.1016/j.biortech.2022.127389] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/24/2022] [Accepted: 05/25/2022] [Indexed: 06/15/2023]
Abstract
This study aimed to implement quorum quenching (QQ) to mitigate membrane fouling in membrane bioreactors (MBRs) treating phenol-rich pharmaceutical wastewater using Rhodococcus sp. BH4 and isolated QQ consortium (QQcs) from activated sludge. Neither BH4 nor QQcs impacted the removal efficiency of chemical oxygen demand (COD) (>94%), phenol (>99%), and ammonium (>99%), indicating that QQ did not have adverse impact on treatment performance. In addition, both BH4 and QQcs effectively retarded membrane fouling, which could be attributed to the reduction of soluble microbial products (SMP). Interestingly, the TMP increase was delayed 68.7% by Rhodococcus sp. BH4, while 31.3% was achieved by QQcs. This difference may be due to the relatively higher degradation for short- and medium-chain N-acyl-homoserine lactones (AHLs) by BH4 compared to the QQcs. Furthermore, the possible presence of quorum sensing (QS) bacteria within QQcs also could have contributed to the less effective fouling control than that of BH4.
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Affiliation(s)
- Shujuan Huang
- NUS Environmental Research Institute, National University of Singapore, Singapore, #02-01, T-Lab Building, 5A Engineering Drive 1, Singapore 117411, Singapore; School of Environmental and Municipal Engineering, Qingdao University of Technology, 777 Jialingjiang Road, Huangdao District, Qingdao, 266520, PR China
| | - Boyan Xu
- NUS Environmental Research Institute, National University of Singapore, Singapore, #02-01, T-Lab Building, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Tze Chiang Albert Ng
- NUS Environmental Research Institute, National University of Singapore, Singapore, #02-01, T-Lab Building, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Meibo He
- Centre for Water Research, Department of Civil & Environmental Engineering, National University of Singapore, Faculty of Engineering, Block E1A, #07-03, 1 Engineering Drive 2, Singapore 117576, Singapore
| | - Xueqing Shi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, 777 Jialingjiang Road, Huangdao District, Qingdao, 266520, PR China
| | - How Yong Ng
- NUS Environmental Research Institute, National University of Singapore, Singapore, #02-01, T-Lab Building, 5A Engineering Drive 1, Singapore 117411, Singapore; Centre for Water Research, Department of Civil & Environmental Engineering, National University of Singapore, Faculty of Engineering, Block E1A, #07-03, 1 Engineering Drive 2, Singapore 117576, Singapore.
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16
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Min S, Lee H, Chae D, Park J, Lee SH, Oh HS, Lee K, Lee CH, Chae S, Park PK. Innovative Biofouling Control for Membrane Bioreactors in Cold Regions by Inducing Environmental Adaptation in Quorum-Quenching Bacteria. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:4396-4403. [PMID: 35290031 DOI: 10.1021/acs.est.1c07786] [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] [Indexed: 06/14/2023]
Abstract
Bacterial quorum quenching (QQ), whose mechanism involves the degradation of quorum-sensing signal molecules, is an effective strategy for controlling biofouling in membrane bioreactors (MBRs). However, MBRs operated at low temperatures, either due to cold climates or seasonal variations, exhibit severe deterioration in QQ efficiency. In this study, a modified culture method for Rhodococcus sp. BH4, a QQ bacterium, was developed to induce environmental adaptation in cold regions. BH4-L, which was prepared by the modified culture method, showed enhancement in QQ efficiency at low temperatures. The higher QQ efficiency obtained by employing BH4-L at 10 °C (compared with that obtained by employing BH4 at 10 °C) was attributed to the higher live/dead cell ratio in the BH4-L-entrapping beads. When BH4-L-entrapping beads were applied to lab-scale MBRs operated at low temperatures, membrane biofouling in MBRs at low temperatures was successfully mitigated because BH4-L could substantially reduce the concentration of signal molecules (N-acyl homoserine lactones) in the biocake. Employing BH4-L in QQ-MBRs could offer a novel solution to the problem of severe membrane biofouling in MBRs in cold regions.
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Affiliation(s)
- Sojin Min
- Department of Environmental and Energy Engineering, Yonsei University, Wonju, Gangwon-do 26439, Republic of Korea
| | - Hosung Lee
- Department of Environmental and Energy Engineering, Yonsei University, Wonju, Gangwon-do 26439, Republic of Korea
| | - Dowon Chae
- Department of Environmental and Energy Engineering, Yonsei University, Wonju, Gangwon-do 26439, Republic of Korea
| | - Jeongwon Park
- Department of Environmental and Energy Engineering, Yonsei University, Wonju, Gangwon-do 26439, Republic of Korea
| | - Sang H Lee
- Department of Earth and Environmental Sciences, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Hyun-Suk Oh
- Department of Environmental Engineering, Seoul National University of Science & Technology, Seoul 01811, Republic of Korea
| | - Kibaek Lee
- Department of Biotechnology and Bioengineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Chung-Hak Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Soryong Chae
- Department of Chemical and Environmental Engineering, University of Cincinnati, 2901 Woodside Drive, Cincinnati, Ohio 45221, United States
| | - Pyung-Kyu Park
- Department of Environmental and Energy Engineering, Yonsei University, Wonju, Gangwon-do 26439, Republic of Korea
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17
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Zhang Y, Zhang Q, Peng H, Wei H, Feng J, Su J, He J. An attempt to stimulate aniline degrading bioreactor by exogenous auto-inducer: Decontamination performance, sludge characteristics, and microbial community structure response. BIORESOURCE TECHNOLOGY 2022; 347:126675. [PMID: 35007739 DOI: 10.1016/j.biortech.2022.126675] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/29/2021] [Accepted: 01/01/2022] [Indexed: 06/14/2023]
Abstract
To break the contradiction between aniline and nitrogen metabolism in activated sludge reactor by influencing microbial interspecific communication, Auto-inducer C6-HSL and 3-oxo-C8-HSL were selected in this study to interfere with aniline degradation system. The two Auto-inducers enhanced the aniline degradation rate and ammonia removal efficiency of the systems, especially C6-HSL. Meanwhile, the main ammonia removal way was assimilation. Exogenous Auto-inducer effectively stabilized the sludge structure and activity from the destruction of aniline, and promoted EPS secretion. Microbial diversity analysis showed that most of functional microflora of seed sludge gradually deactivated with the operation of the reactor, while Rhodococcus, Leucobacter, g_norank_f_Saprospiraceae proliferated wildly under the action of Auto-inducer. Additionally, the interspecific relationship also demonstrated a different trend. Exogenous Auto-inducer was proved to exert positive effects on aniline degradation system to a certain extent, providing new insights in the field of aniline wastewater bio-degradation.
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Affiliation(s)
- Yunjie Zhang
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Qian Zhang
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China.
| | - Haojin Peng
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Hua Wei
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Jiapeng Feng
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Junhao Su
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Jing He
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
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18
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Zhang Y, Liu F, Liu H, Zhang W, Li J. Exogenous N-hexanoyl-L-homoserine lactone assists in upflow anaerobic sludge blanket recovery from acetate accumulation via aceticlastic methanogens enrichment. BIORESOURCE TECHNOLOGY 2022; 346:126600. [PMID: 34973403 DOI: 10.1016/j.biortech.2021.126600] [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: 11/10/2021] [Revised: 12/15/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
Volatile fatty acids (VFAs) accumulation caused by shock loading severely hampers the performance and stability of anaerobic digestion. An upflow anaerobic sludge blanket (UASB) was operated to examine its performance, sludge properties, and microbial community behavior during shock loading and recovery with exogenous N-hexanoyl-L-homoserine lactone (C6-HSL). After shock loading, chemical oxygen demand (COD) removal was significantly reduced from 79.09% to 65.63%. The abundance of Methanosarcinales also significantly decreased, which resulted in acetate accumulation (1,163.55 mg/L). Sludge granules disintegrated along with the decrease in extracellular polymeric substances (EPS). After supplying 1 μg/L C6-HSL, COD removal resumed to 75.10%. Furthermore, C6-HSL enhanced the abundance and metabolic activity of aceticlastic methanogens, decreased acetate concentration to 146.87 mg/L, improved EPS secretion, and caused the re-assembly of disintegrated sludges to form large granules. These results advanced our understanding of microbial community behavior and provided an attractive strategy for restoration of UASB recovered from shock loading.
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Affiliation(s)
- Yupeng Zhang
- College of Resources and Environmental Sciences, Henan Agricultural University, No. 63 Agricultural Road, Zhengzhou 450002, China
| | - Fengqin Liu
- College of Life Sciences, Henan Agricultural University, No. 63 Agricultural Road, Zhengzhou 450002, China
| | - Hongen Liu
- College of Resources and Environmental Sciences, Henan Agricultural University, No. 63 Agricultural Road, Zhengzhou 450002, China
| | - Wenwen Zhang
- College of Resources and Environmental Sciences, Henan Agricultural University, No. 63 Agricultural Road, Zhengzhou 450002, China
| | - Jianzheng Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, China.
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19
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Laj N, Elayadeth-Meethal M, Huxley VAJ, Hussain RR, Saheer Kuruniyan M, Poonkuzhi Naseef P. Quorum-Sensing Molecules: Sampling, Identification and Characterization of N-Acyl-Homoserine Lactone in Vibrio sp. Saudi J Biol Sci 2022; 29:2733-2737. [PMID: 35531216 PMCID: PMC9073047 DOI: 10.1016/j.sjbs.2021.12.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/16/2021] [Accepted: 12/28/2021] [Indexed: 12/12/2022] Open
Abstract
Quorum sensing (QS) is a mechanism by which gram-negative bacteria regulate their gene expression by making use of cell density. QS is triggered by a small molecule known as an autoinducer. Typically, gram-negative bacteria such as Vibrio produce signaling molecules called acyl homoserine lactones (AHLs). However, their levels are very low, making them difficult to detect. We used thin layer chromatography (TLC) to examine AHLs in different Vibrio species, such as Vibrio alginolyticus, Vibrio parahemolyticus, and Vibrio cholerae, against a standard- Chromobacterium violaceum. Further, AHLs were characterised by high-performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC–MS). C4-HSL (N- butanoyl- L- homoserine lactone), C6-HSL (N- hexanoyl- L- homoserine lactone), 3-oxo-C8-HSL (N-(3-Oxooctanoyl)-DL-homoserine lactone), C8-HSL (N- octanoyl- L- homoserine lactone), C110-HSL (N- decanoyl- L- homoserine lactone), C12-HSL (N- dodecanoyl- L- homoserine lactone) and C14-HSL (N- tetradecanoyl- L- homoserine lactone) were identified from Vibrio. These results may provide a basis for blocking the AHL molecules of Vibrio, thereby reducing their pathogenicity and eliminating the need for antimicrobials.
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Affiliation(s)
- Noha Laj
- A J College of Science and Technology, Trivandrum 695317, Kerala, India
| | - Muhammed Elayadeth-Meethal
- Regional Research and Training centre, Kakkur, Department of Animal Breeding and Genetics, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Pookode, Wayanad 673576, Kerala, India
| | | | - Raishy R. Hussain
- A J College of Science and Technology, Trivandrum 695317, Kerala, India
| | - Mohamed Saheer Kuruniyan
- Department of Dental Technology, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia
| | - Punnoth Poonkuzhi Naseef
- Department of Pharmaceutics, Moulana College of Pharmacy, Perinthalmanna, Kerala 679321, India
- Corresponding author.
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20
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Urvoy M, Lami R, Dreanno C, Delmas D, L'Helguen S, Labry C. Quorum Sensing Regulates the Hydrolytic Enzyme Production and Community Composition of Heterotrophic Bacteria in Coastal Waters. Front Microbiol 2021; 12:780759. [PMID: 34956143 PMCID: PMC8709541 DOI: 10.3389/fmicb.2021.780759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 11/17/2021] [Indexed: 12/02/2022] Open
Abstract
Heterotrophic microbial communities play a central role in biogeochemical cycles in the ocean by degrading organic matter through the synthesis of extracellular hydrolytic enzymes. Their hydrolysis rates result from the community’s genomic potential and the differential expression of this genomic potential. Cell-cell communication pathways such as quorum sensing (QS) could impact both aspects and, consequently, structure marine ecosystem functioning. However, the role of QS communications in complex natural assemblages remains largely unknown. In this study, we investigated whether N-acylhomoserine lactones (AHLs), a type of QS signal, could regulate both hydrolytic activities and the bacterial community composition (BCC) of marine planktonic assemblages. To this extent, we carried out two microcosm experiments, adding five different AHLs to bacterial communities sampled in coastal waters (during early and peak bloom) and monitoring their impact on enzymatic activities and diversity over 48 h. Several specific enzymatic activities were impacted during both experiments, as early as 6 h after the AHL amendments. The BCC was also significantly impacted by the treatments after 48 h, and correlated with the expression of the hydrolytic activities, suggesting that changes in hydrolytic intensities may drive changes in BCC. Overall, our results suggest that QS communication could participate in structuring both the function and diversity of marine bacterial communities.
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Affiliation(s)
- Marion Urvoy
- Ifremer, DYNECO, Plouzané, France.,Université de Bretagne Occidentale, CNRS, IRD, Ifremer, UMR 6539, Laboratoire des Sciences de l'Environnement Marin (LEMAR), Plouzané, France
| | - Raphaël Lami
- Sorbonne Université, CNRS, Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM, USR 3579), Observatoire Océanologique de Banyuls, Banyuls-sur-Mer, France
| | | | | | - Stéphane L'Helguen
- Université de Bretagne Occidentale, CNRS, IRD, Ifremer, UMR 6539, Laboratoire des Sciences de l'Environnement Marin (LEMAR), Plouzané, France
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21
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Scheffer G, Hubert CRJ, Enning DR, Lahme S, Mand J, de Rezende JR. Metagenomic Investigation of a Low Diversity, High Salinity Offshore Oil Reservoir. Microorganisms 2021; 9:2266. [PMID: 34835392 PMCID: PMC8621343 DOI: 10.3390/microorganisms9112266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 12/22/2022] Open
Abstract
Oil reservoirs can represent extreme environments for microbial life due to low water availability, high salinity, high pressure and naturally occurring radionuclides. This study investigated the microbiome of saline formation water samples from a Gulf of Mexico oil reservoir. Metagenomic analysis and associated anaerobic enrichment cultures enabled investigations into metabolic potential for microbial activity and persistence in this environment given its high salinity (4.5%) and low nutrient availability. Preliminary 16S rRNA gene amplicon sequencing revealed very low microbial diversity. Accordingly, deep shotgun sequencing resulted in nine metagenome-assembled genomes (MAGs), including members of novel lineages QPJE01 (genus level) within the Halanaerobiaceae, and BM520 (family level) within the Bacteroidales. Genomes of the nine organisms included respiratory pathways such as nitrate reduction (in Arhodomonas, Flexistipes, Geotoga and Marinobacter MAGs) and thiosulfate reduction (in Arhodomonas, Flexistipes and Geotoga MAGs). Genomic evidence for adaptation to high salinity, withstanding radioactivity, and metal acquisition was also observed in different MAGs, possibly explaining their occurrence in this extreme habitat. Other metabolic features included the potential for quorum sensing and biofilm formation, and genes for forming endospores in some cases. Understanding the microbiomes of deep biosphere environments sheds light on the capabilities of uncultivated subsurface microorganisms and their potential roles in subsurface settings, including during oil recovery operations.
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Affiliation(s)
- Gabrielle Scheffer
- Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada;
| | - Casey R. J. Hubert
- Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada;
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK; (S.L.); (J.R.d.R.)
| | - Dennis R. Enning
- Faculty of Life Sciences and Technology, Berlin University of Applied Sciences and Technology, D-13347 Berlin, Germany;
| | - Sven Lahme
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK; (S.L.); (J.R.d.R.)
- Exxon Mobil Upstream Research Company, Spring, TX 77389, USA;
| | - Jaspreet Mand
- Exxon Mobil Upstream Research Company, Spring, TX 77389, USA;
| | - Júlia R. de Rezende
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK; (S.L.); (J.R.d.R.)
- The Lyell Centre, Heriot-Watt University, Edinburgh EH14 4AS, UK
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22
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Fei X, Li S, Wang L, Wang L, Chen F. Impact of light on anoxic/oxic reactors: performance, quorum sensing, and metagenomic characteristics. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 84:1452-1463. [PMID: 34559079 DOI: 10.2166/wst.2021.338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The effect of light has raised attention on wastewater treatment. However, little research has concentrated on the influences of light on activated sludge. In this study, the influences of light on the performance, quorum sensing (QS) and metagenomic characteristics of anoxic/oxic reactors were investigated. The reactor without light (AO1) showed higher total nitrogen (TN) removal (79.15 ± 1.69%) than the reactor with light (AO2) (74.54 ± 1.30%), and significant differences were observed. It was observed that light facilitated the production of protein-like and tryptophan-like substances by employing parallel factor analysis for extracellular polymeric substance (EPS), resulting in more EPS production in AO2, indicating light was beneficial to EPS production. The concentrations of N-acyl-homoserine lactones (AHLs) were various in the two reactors, so the AHLs-mediated QS behaviors in both reactors were also different. These results revealed that light significantly influenced nitrogen removal, EPS, and QS. Metagenomic analysis based on Tax4Fun demonstrated that light reduced the denitrification, stimulated the polysaccharide and protein biosynthesis pathways and down-regulated the AHLs synthesis pathway, resulting in lower TN removal, more EPS production, and lower AHLs concentrations. Based on the above, the likely mechanism was proposed for the influences of light on the reactor.
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Affiliation(s)
- Xuening Fei
- School of Science, Tianjin Chengjian University, Tianjin 300384, China
| | - Songya Li
- Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, Henan 467036, China E-mail:
| | - Linpei Wang
- Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, Henan 467036, China E-mail:
| | - Le Wang
- Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, Henan 467036, China E-mail:
| | - Fuqiang Chen
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China
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23
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Tabraiz S, Petropoulos E, Shamurad B, Quintela-Baluja M, Mohapatra S, Acharya K, Charlton A, Davenport RJ, Dolfing J, Sallis PJ. Temperature and immigration effects on quorum sensing in the biofilms of anaerobic membrane bioreactors. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 293:112947. [PMID: 34289594 DOI: 10.1016/j.jenvman.2021.112947] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 04/25/2021] [Accepted: 05/10/2021] [Indexed: 06/13/2023]
Abstract
Quorum sensing (QS), a microbial communication mechanism modulated by acyl homoserine lactone (AHL) molecules impacts biofilm formation in bioreactors. This study investigated the effects of temperature and immigration on AHL levels and biofouling in anaerobic membrane bioreactors. The hypothesis was that the immigrant microbial community would increase the AHL-mediated QS, thus stimulating biofouling and that low temperatures would exacerbate this. We observed that presence of immigrants, especially when exposed to low temperatures indeed increased AHL concentrations and fouling in the biofilms on the membranes. At low temperature, the concentrations of the main AHLs observed, N-dodecanoyl-L-homoserine lactone and N-decanoyl-L-homoserine lactone, were significantly higher in the biofilms than in the sludge and correlated significantly with the abundance of immigrant bacteria. Apparently low temperature, immigration and denser community structure in the biofilm stressed the communities, triggering AHL production and excretion. These insights into the social behaviour of reactor communities responding to low temperature and influx of immigrants have implications for biofouling control in bioreactors.
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Affiliation(s)
- Shamas Tabraiz
- School of Engineering, Newcastle University, Newcastle, NE1 7RU, UK; School of Natural and Applied Sciences, Canterbury Christ Church University, CT1 1QU, UK.
| | | | - Burhan Shamurad
- School of Engineering, Newcastle University, Newcastle, NE1 7RU, UK
| | | | - Sanjeeb Mohapatra
- Environmental Research Institute, National University of Singapore, 117411, Singapore
| | - Kishor Acharya
- School of Engineering, Newcastle University, Newcastle, NE1 7RU, UK
| | - Alex Charlton
- School of Natural and Environmental Sciences, Newcastle University, UK
| | | | - Jan Dolfing
- Faculty of Engineering and Environment, Northumbria University, Newcastle, NE1 8QH, UK
| | - Paul J Sallis
- School of Engineering, Newcastle University, Newcastle, NE1 7RU, UK
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24
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Zhang J, Zhang LH, Sun P, He JY, Li J. Effects of AHLs inhibitors and exogenous AHLs on the stability and activity of Anammox granules at low temperatures. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:1576-1588. [PMID: 33595115 DOI: 10.1002/wer.1539] [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: 12/31/2020] [Revised: 01/26/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
This study investigated the relationship between acyl homoserine lactones (AHLs)-based quorum sensing (QS) and the properties of Anammox granular sludge at low temperatures (11-23°C). Results indicated that adding different concentrations of AHLs inhibitors reduced the content of N-hexanoyl-dl-homoserine lactone (C6-HSL) and N-octanoyl-dl-homoserinelactone (C8-HSL) in Anammox granules on different degrees at different operation temperatures, which led to the deterioration of granules stability and activity. The important role of endogenous C6-HSL and C8-HSL signals in maintaining Anammox granular sludge stability and activity in low-temperature conditions was revealed. In addition, in the process of reducing operation temperatures, another type of AHL signal (N-(3-oxooctanoyl)-l-homoserine lactone, 3OC8-HSL) was released by Anammox granules. The effects of exogenous C8-HSL on the strength, average diameter, and density of Anammox granules were closely related to the operation temperature. When the operation temperature ranged from 11°C to 16°C, the stability of granules could be significantly improved by exogenous C8-HSL. In addition, the addition of C6-HSL and 3OC8-HSL promoted the activity of Anammox granules when the operation temperatures of the reactors were 11-23°C. This study proposed a novel approach to improve the properties of Anammox granules at low temperatures from the perspective of QS. PRACTITIONER POINTS: Endogenous AHLs played an important role in maintaining the activity and stability of Anammox granules at 11-23°C. Exogenous C8-HSL improved the granules stability at the low temperature of 11-16°C. Exogenous C6-HSL or 3OC8-HSL promoted the granules activity at 11-23°C. Supply a novel way to improve the Anammox granules performance at low temperatures.
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Affiliation(s)
- Jing Zhang
- The Key Laboratory of Beijing for Water Quality Science & Water Environment Recovery Engineering, The College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, China
| | - Lin-Hua Zhang
- Beijing Zhibao Information Technology Co., Ltd, Beijing, China
| | - Peng Sun
- HeBei Fengyuan Green Technology Inc., Cangzhou, China
| | - Jie-Ya He
- College of Chemistry and Chemical Engineering, Cangzhou Normal University, Cangzhou, China
| | - Jun Li
- The Key Laboratory of Beijing for Water Quality Science & Water Environment Recovery Engineering, The College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, China
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25
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12/111phiA Prophage Domestication Is Associated with Autoaggregation and Increased Ability to Produce Biofilm in Streptococcus agalactiae. Microorganisms 2021; 9:microorganisms9061112. [PMID: 34063935 PMCID: PMC8223999 DOI: 10.3390/microorganisms9061112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 05/14/2021] [Accepted: 05/17/2021] [Indexed: 01/11/2023] Open
Abstract
CC17 Streptococcus agalactiae carrying group-A prophages is increasingly responsible for neonatal infections. To investigate the impact of the genetic features of a group-A prophage, we first conducted an in silico analysis of the genome of 12/111phiA, a group-A prophage carried by a strain responsible for a bloodstream infection in a parturient. This revealed a Restriction Modification system, suggesting a prophage maintenance strategy and five ORFs of interest for the host and encoding a type II toxin antitoxin system RelB/YafQ, an endonuclease, an S-adenosylmethionine synthetase MetK, and an StrP-like adhesin. Using the WT strain cured from 12/111phiA and constructing deleted mutants for the ORFs of interest, and their complemented mutants, we demonstrated an impact of prophage features on growth characteristics, cell morphology and biofilm formation. Our findings argue in favor of 12/111phiA domestication by the host and a role of prophage features in cell autoaggregation, glycocalyx and biofilm formation. We suggest that lysogeny may promote GBS adaptation to the acid environment of the vagina, consequently colonizing and infecting neonates.
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26
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Fu L, Li Q, Chen C, Zhang Y, Liu Y, Xu L, Zhou Y, Li C, Zhou D, Rittmann BE. Benzoic and salicylic acid are the signaling molecules of Chlorella cells for improving cell growth. CHEMOSPHERE 2021; 265:129084. [PMID: 33261837 DOI: 10.1016/j.chemosphere.2020.129084] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 11/11/2020] [Accepted: 11/19/2020] [Indexed: 05/28/2023]
Abstract
Cell-to-cell communication regulates microalgae production via signaling molecules (SMs), but few microalgal SM species are known. Here, we document two new microalgae SMs, benzoic acid (BA) and salicylic acid (SA). Initially, crude SMs were extracted from a microalgae culture in which microalgae grew on heterotrophic-enriched phosphorus nutrition. The extracted SMs enhanced Chlorella growth by ∼72%, promoted nutrient uptake, and up-regulated the mitogen-activated protein-kinase signaling cascade. Fourier transform infrared and nuclear magnetic resonance analyses identified the putative SMs was aromatic carboxylic acids. BA and SA were identified using high-resolution mass spectrometry. BA and SA addition increased cell growth by ∼75% and ∼25%; and improved ATP production by ∼35% and ∼20%. Transcriptomic analysis showed that BA and SA were biosynthesized via CoA-dependent, non-oxidative pathway. The SMs upregulated TCA-cycle enzymes, which promoted carbon assimilation and activated DNA-replicating enzyme, so that accelerated cell division. This study identified two new SMs for microalgae cell communication and provides means to identify other SMs.
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Affiliation(s)
- Liang Fu
- Engineering Lab for Water Pollution Control and Resources Recovery of Jilin Province, School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Qingcheng Li
- Engineering Lab for Water Pollution Control and Resources Recovery of Jilin Province, School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Congli Chen
- Engineering Lab for Water Pollution Control and Resources Recovery of Jilin Province, School of Environment, Northeast Normal University, Changchun, 130117, China; National Analytical Research Center of Electrochemistry and Spectroscopy, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Yueju Zhang
- Engineering Lab for Water Pollution Control and Resources Recovery of Jilin Province, School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Yinglu Liu
- Engineering Lab for Water Pollution Control and Resources Recovery of Jilin Province, School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Liang Xu
- Engineering Lab for Water Pollution Control and Resources Recovery of Jilin Province, School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Yihan Zhou
- National Analytical Research Center of Electrochemistry and Spectroscopy, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Chengbin Li
- Changchun Water Group Co. Ltd, Changchun, 130021, China
| | - Dandan Zhou
- Engineering Lab for Water Pollution Control and Resources Recovery of Jilin Province, School of Environment, Northeast Normal University, Changchun, 130117, China.
| | - Bruce E Rittmann
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, 85287, USA
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27
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Gao Y, Li J, Dong H, Qiang Z. Nitrogen removal mechanism of marine anammox bacteria treating nitrogen-laden saline wastewater in response to ultraviolet (UV) irradiation: High UV tolerance and microbial community shift. BIORESOURCE TECHNOLOGY 2021; 320:124325. [PMID: 33157444 DOI: 10.1016/j.biortech.2020.124325] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 10/20/2020] [Accepted: 10/23/2020] [Indexed: 06/11/2023]
Abstract
Salt stress can be naturally overcome by marine anammox bacteria (MAB), while their low growth rate and sensitivity to operational conditions are still challenges for the application of anammox. To enhance the enrichment of MAB and decipher the effects of ultraviolet (UV) irradiation on MAB, UV was introduced in the nitrogen removal of MAB treating nitrogen-laden saline wastewater for the first time. The results indicated that MAB were resistant to a fairly high UV-C dose, 12000 mJ/cm2. Their relative abundance was enhanced by 1.2 folds under 12000 mJ/cm2 UV-C. However, the relative abundance of Actinobacteria, Acidobacteria, Chloroflexi and Marinicella were greatly dropped with enhanced UV-C dose. The tolerance mechanism was diversified, e.g. excessive extracellular polymeric substances, special structure of MAB and interspecific competition/cooperation. Although further study was still needed, the findings shed a light on MAB enrichment and exploited great potentials of MAB in nitrogen-laden saline wastewater treatment.
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Affiliation(s)
- Yuanyuan Gao
- School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Jin Li
- School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
| | - Huiyu Dong
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhimin Qiang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
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28
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Zhou YY, Shao WL, Liu YD, Li X, Shan XY, Jin XB, Gao J, Li W. Genome-based analysis to understanding rapid resuscitation of cryopreserved anammox consortia via sequential supernatant addition. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 744:140785. [PMID: 32707413 DOI: 10.1016/j.scitotenv.2020.140785] [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: 05/21/2020] [Revised: 06/23/2020] [Accepted: 07/04/2020] [Indexed: 06/11/2023]
Abstract
Simple cryopreservation of anaerobic ammonium-oxidation (anammox) consortia has become a promising preservation technology for the fast start-up of the anammox process. Here, we use genome-resolved metagenomics and metatranscriptomics to understand of the microbial interaction in a simple and effective resuscitation process for long-term cryopreserved anammox consortia by sequential addition of anammox SBR supernatant. Performance results showed that sequential addition of anammox supernatant significantly reduced the resuscitation time of the granule-based anammox process from 40 to 20 days. Genome-centric metagenomics were used to recover 19 high-quality draft genomes of anammox and heterotrophic bacteria. Comparative metatranscriptomic analysis was conducted to examine the gene expression of Candidatus Kuenenia stuttgartiensis, the dominant anammox bacterium, and heterotrophic bacteria to better understand their potential interactions. Proteobacteria-affiliated bacteria found in the supernatant were highly active in producing the secondary metabolites molybdopterin cofactor and folate which are needed for growth of the auxotrophic anammox bacteria. In addition, the significantly higher expression levels of hzsA and CO2-fixtion genes in the Candidatus Kuenenia genome indicated the anammox bacteria were likely more active and growing faster after sequential anammox supernatant addition during the resuscitation process. The resuscitation treatment pulse assays confirmed that sequential addition of supernatant was an effective way for the rapid resuscitation of anammox consortia. Our findings offer the first evidence of cross-feeding during the rapid resuscitation of cryopreserved anammox consortia.
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Affiliation(s)
- Yuan-Yuan Zhou
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China
| | - Wen-Li Shao
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China
| | - Yong-di Liu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
| | - Xiang Li
- Suzhou University of Science and Technology, Suzhou, China
| | - Xiao-Yu Shan
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, USA
| | - Xin-Bai Jin
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China
| | - Jie Gao
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China
| | - Wei Li
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China.
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29
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Diversity of Acyl Homoserine Lactone Molecules in Anaerobic Membrane Bioreactors Treating Sewage at Psychrophilic Temperatures. MEMBRANES 2020; 10:membranes10110320. [PMID: 33143124 PMCID: PMC7693955 DOI: 10.3390/membranes10110320] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/23/2020] [Accepted: 10/25/2020] [Indexed: 12/14/2022]
Abstract
This study explores the types of acyl homoserine lactone (AHL) and their concentrations in different compartments of different conventional anaerobic bioreactors: (i) an upflow anaerobic membrane bioreactor (UAnMBR, biofilm/mixed liquor (sludge)); (ii) an anaerobic membrane bioreactor (AnMBR, biofilm/mixed liquor (sludge)); and (iii) an upflow sludge blanket (UASB, sludge only), all operating at 15 °C. Ten types of the AHL, namely C4-HSL, 3-oxo-C4-HSL, C6-HSL, 3-oxo-C6-HSL, C8-HSL, 3-oxo-C8-HSL, C10-HSL, 3-oxo-C10-HSL, C12-HSL, and 3-oxo-C12-HSL, which were investigated in this study, were found in UAnMBR and UASB, whilst only six of them (C4-HSL, 3-oxo-C4-HSL, C8-HSL, C10-HSL, 3-oxo-C10-HSL, and C12-HSL) were found in AnMBR. Concentrations of total AHL were generally higher in the biofilm than the sludge for both membrane bioreactors trialed. C10-HSL was the predominant AHL found in all reactors (biofilm and sludge) followed by C4-HSL and C8-HSL. Overall, the UAnMBR biofilm and sludge had 10-fold higher concentrations of AHL compared to the AnMBR. C10-HSL was only correlated with bacteria (p < 0.05), whilst other types of AHL were correlated with both bacteria and archaea. This study improves our understanding of AHL-mediated Quorum Sensing (QS) in the biofilms/sludge of UAnMBR and AnMBR, and provides new information that could contribute to the development of quorum quenching anti-fouling strategies in such systems.
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30
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Yan X, Zheng S, Huo Z, Shi B, Huang J, Yang J, Ma J, Han Y, Wang Y, Cheng K, Feng J, Sun J. Effects of exogenous N-acyl-homoserine lactones on nutrient removal, sludge properties and microbial community structures during activated sludge process. CHEMOSPHERE 2020; 255:126945. [PMID: 32388260 DOI: 10.1016/j.chemosphere.2020.126945] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 06/11/2023]
Abstract
This study investigated the effects of exogenous N-acyl-homoserine lactone (AHL) signal molecules, N-hexanoyl-l-homoserine lactone (C6-HSL) and N-octanoyl-l-homoserine lactone (C8-HSL), on treatment performance, sludge properties and microbial community structures in activated sludge systems. Results showed that the nitrification and denitrification efficiencies were enhanced with the addition of signal molecules. The particle size, irregularity, and internal mass transfer resistance of activated sludge flocs (ASFs) increased, primarily because dosing AHLs led to a content increase and chemical composition variation of extracellular polymeric substances (EPS) in sludge. Microbial analysis indicated an increase in both the bacterial richness and diversity of the systems. The relative abundances of the key functional groups, including bacteria related to C and N removal and EPS production, varied correspondingly. This study presents an insight into the comprehensive understanding of the effects of AHL-based quorum sensing on activated sludge treatment process.
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Affiliation(s)
- Xu Yan
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China.
| | - Shikan Zheng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Zhaoman Huo
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Bowen Shi
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Jiajun Huang
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Jie Yang
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Jiahui Ma
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Yunping Han
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Yan Wang
- School of Public Health, Xinxiang Medical University, Xinxiang, 453003, China
| | - Ke Cheng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Jinglan Feng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Jianhui Sun
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China
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31
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Li YS, Tian T, Li BB, Yu HQ. Longer persistence of quorum quenching bacteria over quorum sensing bacteria in aerobic granules. WATER RESEARCH 2020; 179:115904. [PMID: 32413615 DOI: 10.1016/j.watres.2020.115904] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/26/2020] [Accepted: 04/30/2020] [Indexed: 05/06/2023]
Abstract
Involvements of quorum sensing (QS) in the formation of aerobic granules for wastewater treatment have been well recognized. In previous studies the evolution of the QS-related activities and communities during bioreactor start-up period has been extensively studied, while the variation of QS in long-term reactor operation remains unrevealed. Furthermore, information about the roles of quorum quenching (QQ) in bioreactors is very limited. In this work, both QS and QQ during the start-up and successive long-term operation period of an aerobic granule bioreactor were explored. The QS activity and communities increased in the start-up but gradually decreased in the long-term operation, while the QQ activity and communities remained stable. These results indicate the longer persistence of QQ than QS in the granules and the minor contribution of QS in the long-term operation. This work provides a new insight into the roles of QQ and QS in wastewater treatment bioreactors.
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Affiliation(s)
- Yu-Sheng Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Tian Tian
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Bing-Bing Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
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32
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Ma H, Ma S, Luo W, Ding L, Wang J, Ren H. Long-term exogenous addition of synthetic acyl homoserine lactone enhanced the anaerobic granulation process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 696:133809. [PMID: 31470321 DOI: 10.1016/j.scitotenv.2019.133809] [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: 04/25/2019] [Revised: 08/05/2019] [Accepted: 08/05/2019] [Indexed: 06/10/2023]
Abstract
Although adding long-term acyl homoserine lactone (AHL) over one month was highly instructive for the development of an AHL-based anaerobic granulation strategy, the role of long-term exogenous AHL at different concentrations in the granulation process was poorly understood due to commercial exogenous AHL's extremely high cost. In this study, organic synthesis of N-decanoyl-homoserine lactone (C10-HSL) was employed for the first time to drastically reduce the cost of the AHL addition. Daily dosages of exogenous C10-HSL at 50 nM, 500 nM and 5000 nM were separately added into anaerobic bioreactors to promote the granulation process for as long as 168 days. 50 nM C10-HSL showed a negligible effect on the granulation process while 5000 nM C10-HSL achieved the best performance with the highest chemical oxygen demand (COD) removal, largest granule size and best extracellular polymeric substance production. Bacterial analysis indicated that exogenous C10-HSL showed a concentration-related effect in bacterial community organization. Besides, addition of 5000 nM C10-HSL resulted in the greatest promotion of Methanosaeta which was extremely important to the formation of anaerobic granule. This study provides a foundation for the future application of long-term exogenous AHL manipulation to improve the granulation process in an engineered ecosystem.
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Affiliation(s)
- Haijun Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Sijia Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Wenqi Luo
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Lili Ding
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Jinfeng Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.
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Li S, Fei X, Cao L, Chi Y. Insights into the effects of carbon source on sequencing batch reactors: Performance, quorum sensing and microbial community. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 691:799-809. [PMID: 31326803 DOI: 10.1016/j.scitotenv.2019.07.191] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 07/12/2019] [Accepted: 07/12/2019] [Indexed: 06/10/2023]
Abstract
Effects of carbon source on the performance, quorum sensing (QS) and microbial communities in the sequencing batch reactors were investigated in this work. Among the chosen carbon source, sodium acetate (R1), glucose (R2), starch (R3) and Tween 80 (R4), sodium acetate was the best carbon source for nutrient removal, while starch was favorable for inducing the sludge bulking, and Tween 80 was beneficial to the production of extracellular polymeric substances (EPS) and proliferation of Microthrix parvicella. Additionally, the R2 value of linear correlation between sludge settleability and particle size in four reactors followed an order of R1 > R2 > R3 > R4. Moreover, Person correlation analysis showed that various significant correlations were observed in reactors fed with different carbon sources and the QS mainly mediated the production and component of EPS. High-throughput sequencing analysis revealed that the carbon source affected microbial communities and the Canonical correspondence analysis results indicated that QS related to microbial communities. It was inferred that the interactions between microbial communities and QS affected system performance.
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Affiliation(s)
- Songya Li
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Xuening Fei
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; School of Science, Tianjin Chengjian University, Tianjin 300384, China.
| | - Lingyun Cao
- School of Science, Tianjin Chengjian University, Tianjin 300384, China
| | - Yongzhi Chi
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China
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Gebreyohannes G, Nyerere A, Bii C, Sbhatu DB. Challenges of intervention, treatment, and antibiotic resistance of biofilm-forming microorganisms. Heliyon 2019; 5:e02192. [PMID: 31463386 PMCID: PMC6709409 DOI: 10.1016/j.heliyon.2019.e02192] [Citation(s) in RCA: 189] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 06/17/2019] [Accepted: 07/29/2019] [Indexed: 01/23/2023] Open
Abstract
Background Biofilms are multicellular communities of microorganisms held together by a self-produced extracellular matrix. The ability of microbes to form biofilm is a universal, ubiquitous, and dynamic process. This dynamic process of biofilms establishes an important strategy to withstand and survive harsh environmental conditions and antimicrobial agents. Objective This review paper aims to give an overview of antibiotic resistance, intervention, and treatment of infections caused by biofilm-forming organisms. Moreover, it can also help to motivate scholars to search for new anti-biofilm strategies and most appropriate methods to tackle the effect of biofilm infections on healthcare services. Methods This paper was written by reviewing recent research and review articles which are reporting about the antibiotic resistance, prevention, and treatment of biofilm-producing organisms. Conclusion Bioprospecting for quorum quenching compounds can be an appropriate solution for controlling biofilm infections.
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Affiliation(s)
- Gebreselema Gebreyohannes
- Department of Biological and Chemical Engineering, Mekelle Institute of Technology, Mekelle University, Ethiopia.,Molecular Biology and Biotechnology, Pan African University, Institute for Basic Sciences, Technology, and Innovation, Nairobi, Kenya
| | - Andrew Nyerere
- Department of Medical Microbiology, College of Health Sciences, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
| | - Christine Bii
- Center for Microbiology Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Desta Berhe Sbhatu
- Department of Biological and Chemical Engineering, Mekelle Institute of Technology, Mekelle University, Ethiopia
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Draft Genome Sequence of Enterobacter sp. Strain AD2-3, Isolated from a Postmining Site in Benguet, Philippines. Microbiol Resour Announc 2019; 8:8/30/e00563-19. [PMID: 31346017 PMCID: PMC6658687 DOI: 10.1128/mra.00563-19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The novel strain Enterobacter sp. strain AD2-3 was isolated from postmining soil samples collected from Antamok mine in Benguet, Philippines. Here, we report a draft of its whole-genome sequence, with predicted gene inventories supporting metal tolerance, nitrogen fixation, phosphate solubilization, and indole acetic acid production.
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Tang X, Guo Y, Zhu T, Tao H, Liu S. Identification of quorum sensing signal AHLs synthases in Candidatus Jettenia caeni and their roles in anammox activity. CHEMOSPHERE 2019; 225:608-617. [PMID: 30901654 DOI: 10.1016/j.chemosphere.2019.02.192] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 02/17/2019] [Accepted: 02/28/2019] [Indexed: 06/09/2023]
Abstract
Acyl-homoserine lactone (AHL)-based quorum sensing (QS) in the anaerobic ammonium oxidizing (anammox) consortia has attracted increasing attention. However, AHL synthase in anammox bacteria and the relationship between AHL synthetic genes and anammox activity are still not clear because anammox bacteria have not been isolated from the consortia. Two novel synthases of AHLs (JqsI-1 and JqsI-2), which are HdtS-type rather than the widely studied LuxI-type, were identified in anammox bacteria Candidatus Jettenia caeni and synthesized four AHLs. There was a correlation between AHL concentration, in situ transcriptional expression of the AHL synthase genes (jqsI-1 and jqsI-2) and genetic marker of anammox activity (hydrazine synthase gene, hzsA). And AHL add-back studies demonstrated that AHL influence the expression of hzsA to regulate anammox bacterial activity. This study provides insight into the QS communication pathway of anammox bacteria for wastewater treatment.
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Affiliation(s)
- Xi Tang
- Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Yongzhao Guo
- Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Tingting Zhu
- State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology, Shenzhen Key Laboratory of Emerging Contaminants Detection & Control in Water Environment, Shenzhen Academy of Environmental Sciences, Shenzhen, 518001, China
| | - Huchun Tao
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Sitong Liu
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
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