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He C, Wu H, Wei G, Zhu S, Qiu G, Wei C. Simultaneous decarbonization and phosphorus removal by Tetrasphaera elongata with glucose as carbon source under aerobic conditions. BIORESOURCE TECHNOLOGY 2024; 393:130048. [PMID: 37980947 DOI: 10.1016/j.biortech.2023.130048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/04/2023] [Accepted: 11/15/2023] [Indexed: 11/21/2023]
Abstract
Previous researches have recognized the vital role of Tetrasphaera elongata in enhanced biological phosphorus removal systems, but the underlying mechanisms remain under-investigated. To address this issue, this study investigated the metabolic characteristics of Tetrasphaera elongata when utilizing glucose as the sole carbon source. Results showed under aerobic conditions, Tetrasphaera elongata exhibited a glucose uptake rate of 136.6 mg/(L·h) and a corresponding phosphorus removal rate of 8.6 mg P/(L·h). Upregulations of genes associated with the glycolytic pathway and oxidative phosphorylation were observed. Noteworthily, the genes encoding the two-component sensor histidine kinase and response regulator transcription factor exhibited a remarkable 28.3 and 27.4-fold increase compared with the group without glucose. Since these genes play a pivotal role in phosphate-specific transport systems, collectively, these findings shed light on a potential mechanism for simultaneous decarbonization and phosphorus removal by Tetrasphaera elongata under aerobic conditions, providing fresh insights into phosphorus removal from wastewaters.
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Affiliation(s)
- Chao He
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China
| | - Haizhen Wu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China.
| | - Gengrui Wei
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Shuang Zhu
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Guanglei Qiu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Chaohai Wei
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
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Zhang C, Guisasola A, Baeza JA. Exploring the stability of an A-stage-EBPR system for simultaneous biological removal of organic matter and phosphorus. CHEMOSPHERE 2023; 313:137576. [PMID: 36529170 DOI: 10.1016/j.chemosphere.2022.137576] [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: 06/07/2022] [Revised: 10/27/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023]
Abstract
This work evaluates the performance and stability of a continuous anaerobic/aerobic A-stage system with integrated enhanced biological phosphorus removal (A-stage-EBPR) under different operational conditions. Dissolved oxygen (DO) in the aerobic reactor was tested in the 0.2-2 mgDO/L range using real wastewater amended with propionic acid, obtaining almost full simultaneous COD and P removal without nitrification in the range 0.5-1 mgDO/L, but failing at 0.2 mgDO/L. Anaerobic purge was tested to evaluate a possible mainstream P-recovery strategy, generating a P-enriched stream containing 22% of influent P. COD and N mass balances indicated that about 43% of the influent COD could be redirected to the anaerobic digestion for methane production and 66% of influent NH4+-N was discharged in the effluent for the following N-removal B-stage. Finally, when the system was switched to glutamate as sole carbon source, successful EBPR activity and COD removal were maintained for two months, but after this period settleability problems appeared with biomass loss. Microbial community analysis indicated that Propionivibrio, Thiothrix and Lewinella were the most abundant species when propionic acid was the carbon source and Propionivibrio was the most favoured with glutamate. Thiothrix, Hydrogenophaga, Dechloromonas and Desulfobacter appeared as the dominant polyphosphate-accumulating organisms (PAOs) under different operation stages.
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Affiliation(s)
- Congcong Zhang
- GENOCOV. Departament d'Enginyeria Química, Biològica i Ambiental. Escola d'Enginyeria. Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain.
| | - Albert Guisasola
- GENOCOV. Departament d'Enginyeria Química, Biològica i Ambiental. Escola d'Enginyeria. Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain.
| | - Juan Antonio Baeza
- GENOCOV. Departament d'Enginyeria Química, Biològica i Ambiental. Escola d'Enginyeria. Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain.
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Zhao C, Zhang C, Shen Z, Yang Y, Qiu Z, Li C, Xue B, Zhang X, Yang X, Wang S, Wang J. Ethylmalonyl-CoA pathway involved in polyhydroxyvalerate synthesis in Candidatus Contendobacter. AMB Express 2022; 12:39. [PMID: 35333986 PMCID: PMC8956781 DOI: 10.1186/s13568-022-01380-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 03/19/2022] [Indexed: 11/12/2022] Open
Abstract
Here a stable glycogen accumulating organisms (GAOs) system was operated by anaerobic–aerobic mode in the sequencing batch reactor. We focused on the metabolic mechanisms of PHAs storage from GAOs. Our system showed the classic characteristic of glycogen accumulating metabolism (GAM). Glycogen consumption was followed by acetic acid uptake to synthesize poly-β-hydroxyalkanoates (PHAs) during the anaerobic period, and glycogen was synthesized by PHAs degradation in the aerobic stage. Microbial community structure indicated that Candidatus Contendobacter was the most prevalent GAOs. We found that the ethylmalonyl-CoA (EMC) pathway was the crucial pathway supplying the core substance propionyl-CoA for poly-β-hydroxyvalerate (PHV) synthesis in Candidatus Contendobacter. All genes in EMC pathway were mainly located in Candidatus Contendobacter by gene source analysis. The key genes expression of EMC pathway increased with Candidatus Contendobacter enrichment, further validating that propionyl-CoA was synthesized by Candidatus Contendobacter predominantly via EMC pathway. Our work revealed the novel mechanisms underlying PHV synthesis through EMC pathway and further improved the intercellular storage metabolism of GAOs. We observed GAM characteristic in the GAOs enrichment system. Metagenome-based analysis revealed that Candidatus Contendobacter was the dominant GAOs. The EMC pathway was a novel propionyl-CoA synthesis pathway for PHV in Candidatus Contendobacter.
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Rey-Martínez N, Merdan G, Guisasola A, Baeza JA. Nitrite and nitrate inhibition thresholds for a glutamate-fed bio-P sludge. CHEMOSPHERE 2021; 283:131173. [PMID: 34182653 DOI: 10.1016/j.chemosphere.2021.131173] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 04/30/2021] [Accepted: 06/06/2021] [Indexed: 06/13/2023]
Abstract
Enhanced biological phosphorus removal (EBPR) is an efficient and sustainable technology to remove phosphorus from wastewater. A widely known cause of EBPR deterioration in wastewater treatment plants (WWTPs) is the presence of nitrate/nitrite or oxygen in the anaerobic reactor. Moreover, most existing studies on the effect of either permanent aerobic conditions or inhibition of EBPR by nitrate or free nitrous acid (FNA) have been conducted with a "Candidatus Accumulibacter" or Tetrasphaera-enriched sludge, which are the two major reported groups of polyphosphate accumulating organisms (PAO) with key roles in full-scale EBPR WWTPs. This work reports the denitrification capabilities of a bio-P microbial community developed using glutamate as the sole source of carbon and nitrogen. This bio-P sludge exhibited a high denitrifying PAO (DPAO) activity, in fact, 56% of the phosphorus was uptaken under anoxic conditions. Furthermore, this mixed culture was able to use nitrite and nitrate as electron acceptor for P-uptake, being 1.8 μg HNO2-N·L-1 the maximum FNA concentration at which P-uptake can occur. Net P-removal was observed under permanent aerobic conditions. However, this microbial culture was more sensitive to FNA and permanent aerobic conditions compared to "Ca. Accumulibacter"-enriched sludge.
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Affiliation(s)
- Natalia Rey-Martínez
- GENOCOV. Departament d'Enginyeria Química, Biològica i Ambiental, Universitat Autònoma de Barcelona, Spain.
| | - Gökçe Merdan
- GENOCOV. Departament d'Enginyeria Química, Biològica i Ambiental, Universitat Autònoma de Barcelona, Spain; Department of Environmental Engineering, Namık Kemal University, Turkey.
| | - Albert Guisasola
- GENOCOV. Departament d'Enginyeria Química, Biològica i Ambiental, Universitat Autònoma de Barcelona, Spain.
| | - Juan Antonio Baeza
- GENOCOV. Departament d'Enginyeria Química, Biològica i Ambiental, Universitat Autònoma de Barcelona, Spain.
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Roy S, Guanglei Q, Zuniga-Montanez R, Williams RB, Wuertz S. Recent advances in understanding the ecophysiology of enhanced biological phosphorus removal. Curr Opin Biotechnol 2021; 67:166-174. [PMID: 33582603 DOI: 10.1016/j.copbio.2021.01.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 01/02/2023]
Abstract
Enhanced biological phosphorus removal (EBPR) is an efficient, cost-effective, and sustainable method for removing excess phosphorus from wastewater. Polyphosphate accumulating organisms (PAOs) exhibit a unique physiology alternating between anaerobic conditions for uptake of carbon substrates and aerobic or anoxic conditions for phosphorus uptake. The implementation of high-throughput sequencing technologies and advanced molecular tools along with biochemical characterization has provided many new perspectives on the EBPR process. These approaches have helped identify a wide range of carbon substrates and electron acceptors utilized by PAOs that in turn influence interactions with microbial community members and determine overall phosphorus removal efficiency. In this review, we systematically discuss the microbial diversity and metabolic response to a range of environmental conditions and process control strategies in EBPR.
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Affiliation(s)
- Samarpita Roy
- Singapore Centre for Environmental Life Sciences Engineering, National University of Singapore, Singapore 119077, Singapore
| | - Qiu Guanglei
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Rogelio Zuniga-Montanez
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore; Department of Civil and Environmental Engineering, University of California, One Shields Avenue, Davis, CA 95616, United States
| | - Rohan Bh Williams
- Singapore Centre for Environmental Life Sciences Engineering, National University of Singapore, Singapore 119077, Singapore
| | - Stefan Wuertz
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore; Department of Civil and Environmental Engineering, University of California, One Shields Avenue, Davis, CA 95616, United States; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore.
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He Q, Song J, Zhang W, Gao S, Wang H, Yu J. Enhanced simultaneous nitrification, denitrification and phosphorus removal through mixed carbon source by aerobic granular sludge. JOURNAL OF HAZARDOUS MATERIALS 2020; 382:121043. [PMID: 31450207 DOI: 10.1016/j.jhazmat.2019.121043] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/12/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
Aerobic granular sludge-based simultaneous nitrification, denitrification and phosphorus removal (SNDPR) systems were configured for the treatment of low-strength municipal wastewater. Granular characteristics, process performance, and the corresponding microbial ecology dynamics were comprehensively explored with sodium acetate and succinate as mixed carbon source. Results revealed that aerobic granules kept structural and functional resilience, while mixed carbon source largely altered and balanced the growth and competition of phosphorus/glycogen accumulating organisms (PAOs/GAOs). Appropriate ratio of mixed carbon source was vital for superb physiochemical behaviors and reliable removal performance by aerobic granules. Therefore, the aerobic granular SNDPR system could achieve deep-level nutrients removal through enhancing the anaerobic carbon uptake rate and strengthening the carbon usage efficiency. The present work could add some guiding sight into the application of aerobic granular SNDPR system for wastewater treatment.
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Affiliation(s)
- Qiulai He
- Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Department of Water Engineering and Science, College of Civil Engineering, Hunan University, Changsha, 410082, China.
| | - Jianyang Song
- School of Civil Engineering, Wuhan University, Wuhan, 430072, China
| | - Wei Zhang
- School of Civil Engineering, Wuhan University, Wuhan, 430072, China
| | - Shuxian Gao
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Hongyu Wang
- School of Civil Engineering, Wuhan University, Wuhan, 430072, China.
| | - Jian Yu
- Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Department of Water Engineering and Science, College of Civil Engineering, Hunan University, Changsha, 410082, China
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Profiling population-level diversity and dynamics of Accumulibacter via high throughput sequencing of ppk1. Appl Microbiol Biotechnol 2019; 103:9711-9722. [DOI: 10.1007/s00253-019-10183-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 09/09/2019] [Accepted: 10/07/2019] [Indexed: 12/13/2022]
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Research progress and application prospect of anaerobic biological phosphorus removal. Appl Microbiol Biotechnol 2019; 103:2133-2139. [DOI: 10.1007/s00253-019-09634-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 01/07/2019] [Indexed: 10/27/2022]
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Nittami T, Mukai M, Uematsu K, Yoon LW, Schroeder S, Chua ASM, Fukuda J, Fujita M, Seviour RJ. Effects of different carbon sources on enhanced biological phosphorus removal and “Candidatus Accumulibacter” community composition under continuous aerobic condition. Appl Microbiol Biotechnol 2017; 101:8607-8619. [DOI: 10.1007/s00253-017-8571-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 09/20/2017] [Accepted: 09/28/2017] [Indexed: 10/18/2022]
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