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Han C, Dai H, Guo Z, Zhu G, Li B, Nawaz Abbasi H, Wang X. Insight into the mechanism of nutrients removal and response regulation of denitrifying phosphorus removal system under calcium ion stress. BIORESOURCE TECHNOLOGY 2023; 388:129747. [PMID: 37717705 DOI: 10.1016/j.biortech.2023.129747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/25/2023] [Accepted: 09/06/2023] [Indexed: 09/19/2023]
Abstract
The influent quality is an important factor affecting the nutrients removal and operational stability of denitrifying phosphorus removal (DPR) system. This study investigated the effects of calcium ion (Ca2+) on the nutrients removal, nitrogen oxide (N2O) release, microbial community, and quorum sensing in DPR system. Results showed that high accumulation of Ca2+ had a significant impact on the carbon footprint of DPR system. Specifically, N2O release reached 2.11 mg/L under Ca2+ of 150 mg/L, which represented 214.93% increase compared to 0 mg/L of Ca2+. The DPR system demonstrated its adaptability to elevated Ca2+ concentrations by modifying key enzyme activities involved in nitrogen and phosphorus removal, altering the microbial community structure, and adjusting the type and content of signal molecules. These findings hold significant implications for understanding the stress mechanism of Ca2+ on DPR system, ultimately aiding in the maintenance and enhancement of stable operational performance in biological wastewater treatment process.
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Affiliation(s)
- Cheng Han
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Hongliang Dai
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China; School of Energy and Environment, Southeast University, Nanjing 210096, China.
| | - Zechong Guo
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Guangcan Zhu
- School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Bing Li
- Jiangsu Zhongchuang Qingyuan Technology Co., Ltd., Yancheng 224000, China
| | - Haq Nawaz Abbasi
- Department of Environmental Science, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan.
| | - Xingang Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China.
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Diaz R, Mackey B, Chadalavada S, Kainthola J, Heck P, Goel R. Enhanced Bio-P removal: Past, present, and future - A comprehensive review. CHEMOSPHERE 2022; 309:136518. [PMID: 36191763 DOI: 10.1016/j.chemosphere.2022.136518] [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: 07/05/2022] [Revised: 09/14/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Excess amounts of phosphorus (P) and nitrogen (N) from anthropogenic activities such as population growth, municipal and industrial wastewater discharges, agriculture fertilization and storm water runoffs, have affected surface water chemistry, resulting in episodes of eutrophication. Enhanced biological phosphorus removal (EBPR) based treatment processes are an economical and environmentally friendly solution to address the present environmental impacts caused by excess P present in municipal discharges. EBPR practices have been researched and operated for more than five decades worldwide, with promising results in decreasing orthophosphate to acceptable levels. The advent of molecular tools targeting bacterial genomic deoxyribonucleic acid (DNA) has also helped us reveal the identity of potential polyphosphate-accumulating organisms (PAO) and denitrifying PAO (DPAO) responsible for the success of EBPR. Integration of process engineering and environmental microbiology has provided much-needed confidence to the wastewater community for the successful implementation of EBPR practices around the globe. Despite these successes, the process of EBPR continues to evolve in terms of its microbiology and application in light of other biological processes such as anaerobic ammonia oxidation and on-site carbon capture. This review provides an overview of the history of EBPR, discusses different operational parameters critical for the successful operation of EBPR systems, reviews current knowledge of EBPR microbiology, the influence of PAO/DPAO on the disintegration of microbial communities, stoichiometry, EBPR clades, current practices, and upcoming potential innovations.
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Affiliation(s)
- Ruby Diaz
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, UT, 84112, USA
| | - Brendan Mackey
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, UT, 84112, USA
| | - Sreeni Chadalavada
- School of Engineering, University of Southern Queensland Springfield, Queensland, 4350, Australia.
| | - Jyoti Kainthola
- Department of Civil Engineering, École Centrale School of Engineering, Mahindra University, Hyderabad, India, 500043
| | - Phil Heck
- Central Valley Water Reclamation Facility, Salt Lake City, UT, USA
| | - Ramesh Goel
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, UT, 84112, USA.
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Zhao W, Bi X, Peng Y, Bai M. Research advances of the phosphorus-accumulating organisms of Candidatus Accumulibacter, Dechloromonas and Tetrasphaera: Metabolic mechanisms, applications and influencing factors. CHEMOSPHERE 2022; 307:135675. [PMID: 35842039 DOI: 10.1016/j.chemosphere.2022.135675] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/19/2022] [Accepted: 07/08/2022] [Indexed: 06/15/2023]
Abstract
Phosphorus-accumulating organisms (PAOs), which harbor metabolic mechanisms for phosphorus removal, are widely applied in wastewater treatment. Recently, novel PAOs and phosphorus removal metabolic pathways have been identified and studied. Specifically, Dechloromonas and Tetrasphaera can remove phosphorus via the denitrifying phosphorus removal and fermentation phosphorus removal pathways, respectively. As the main PAOs in biological phosphorus removal systems, the conventional PAO Candidatus Accumulibacter and the novel PAOs Dechloromonas and Tetrasphaera are thoroughly discussed in this paper, with a specific focus on their phosphorus removal metabolic mechanisms, process applications, community abundance and influencing factors. Dechloromonas can achieve simultaneous nitrogen and phosphorus removal in an anoxic environment through the denitrifying phosphorus removal metabolic pathway, which can further reduce carbon source requirements and aeration energy consumption. The metabolic pathways of Tetrasphaera are diverse, with phosphorus removal occurring in conjunction with macromolecular organics degradation through anaerobic fermentation. A collaborative oxic phosphorus removal pathway between Tetrasphaera and Ca. Accumulibacter, or a collaborative anoxic denitrifying phosphorus removal pathway between Tetrasphaera and Dechloromonas are future development directions for biological phosphorus removal technologies, which can further reduce carbon source and energy consumption while achieving enhanced phosphorus removal.
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Affiliation(s)
- Weihua Zhao
- State and Local Joint Engineering Research Center of Municipal Wastewater Treatment and Resource Recycling, Qingdao University of Technology, Qingdao, 266033, PR China; National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, China
| | - Xuejun Bi
- State and Local Joint Engineering Research Center of Municipal Wastewater Treatment and Resource Recycling, Qingdao University of Technology, Qingdao, 266033, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, China.
| | - Meng Bai
- State and Local Joint Engineering Research Center of Municipal Wastewater Treatment and Resource Recycling, Qingdao University of Technology, Qingdao, 266033, PR China
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Wu P, Zhang X, Wang C, Liu W, Faustin F. Feasibility of applying intermittent aeration and baffles for achieving granular nitritation in a continuous short-cut denitrifying phosphorus removal system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 715:137023. [PMID: 32041004 DOI: 10.1016/j.scitotenv.2020.137023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/28/2020] [Accepted: 01/29/2020] [Indexed: 06/10/2023]
Abstract
It was difficult to obtain a stable and efficient short-cut denitrification and phosphorus removal process for domestic sewage treatment, therefore, the possibility of using granulation technology of nitritation sludge and intermittent aeration was evaluated to resolve the difficulty. Results showed that the nitrogen and phosphorus removal efficiencies of the system were 72% and 93%, respectively, under the condition of mode 3 (a period of 10 min with aeration 8 min and stop 2 min) with aeration energy consumption decreasing 20%. Microbial community revealed that Rhodocyclales was the dominant short-cut denitrifying phosphorus removing bacteria in the process, closely related to the performance of short-cut denitrifying phosphorus removal. Furthermore, Thauera and Denitratisoma belonging to the Rhodocyclales play a significant role of short-cut denitrifying phosphorus removal in the process. In addition, Aeromonas improved the performance of short-cut denitrifying phosphorus removal. Finally, nutrient removal efficiency was improved 8% in intermittent aeration mode 3 based on short-cut denitrifying phosphorus removal.
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Affiliation(s)
- Peng Wu
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, 215009 Suzhou, People's Republic of China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, No. 1 Kerui Road, 215009 Suzhou, People's Republic of China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, No. 1 Kerui Road, 215009 Suzhou, People's Republic of China.
| | - Xingxing Zhang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, 215009 Suzhou, People's Republic of China
| | - Chaochao Wang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, 215009 Suzhou, People's Republic of China
| | - Wenru Liu
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, 215009 Suzhou, People's Republic of China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, No. 1 Kerui Road, 215009 Suzhou, People's Republic of China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, No. 1 Kerui Road, 215009 Suzhou, People's Republic of China.
| | - Fangnigbe Faustin
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, 215009 Suzhou, People's Republic of China
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Dai H, Lu X, Peng L, Li X, Dai Z. Enrichment culture of denitrifying phosphorus removal sludge and its microbial community analysis. ENVIRONMENTAL TECHNOLOGY 2017; 38:2800-2810. [PMID: 28041535 DOI: 10.1080/09593330.2016.1278276] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 12/28/2016] [Indexed: 06/06/2023]
Abstract
An efficient one-step domestication method with mixed electron acceptors and short-time post-aeration was developed for the enrichment culture of denitrifying phosphorus removal sludge. The acclimation time, performance of nitrogen and phosphorus simultaneous removal and microbial community structure were investigated to reveal the difference among the obtained phosphorus removal sludge using different acclimation ways. Results showed that the proposed method with optimal proportion of nitrite and nitrate could significantly shorten domestication time (28 days) compared with the traditional two-step method (60 days), but exerted nearly no influence on the removal efficiency of nitrogen and phosphorus. High-throughput sequencing revealed that similar microbial community structure of DPAOs sludge was obtained with different acclimation methods. Compared with seed sludge, microbial community shifted obviously, and the dominant microbial population of Dechloromonas-related phosphorus removal bacteria increased significantly. It could be inferred that the appropriate concentration of nitrite was conducive to the rapid enrichment of DPAOs under alternative anaerobic/anoxic operation. Meanwhile, anaerobic/oxic condition was favorable for the enrichment of Candidatus Accumulibacter-related phosphorus removal organisms, and short-time post-aeration in the proposed method could reduce the potential public health hazard.
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Affiliation(s)
- Hongliang Dai
- a School of Energy and Environment , Southeast University , Nanjing , China
- b ERC Taihu Lake Water Environment (Wuxi) , Wuxi , China
| | - Xiwu Lu
- a School of Energy and Environment , Southeast University , Nanjing , China
- b ERC Taihu Lake Water Environment (Wuxi) , Wuxi , China
| | - Lihong Peng
- a School of Energy and Environment , Southeast University , Nanjing , China
- b ERC Taihu Lake Water Environment (Wuxi) , Wuxi , China
| | - Xiang Li
- a School of Energy and Environment , Southeast University , Nanjing , China
- b ERC Taihu Lake Water Environment (Wuxi) , Wuxi , China
| | - Zheqin Dai
- a School of Energy and Environment , Southeast University , Nanjing , China
- b ERC Taihu Lake Water Environment (Wuxi) , Wuxi , China
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Dai H, Wu Y, Peng L, Dai Z, Li X, Lu X. Effects of calcium on the performance, bacterial population and microbial metabolism of a denitrifying phosphorus removal system. BIORESOURCE TECHNOLOGY 2017; 243:828-835. [PMID: 28724254 DOI: 10.1016/j.biortech.2017.07.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/01/2017] [Accepted: 07/06/2017] [Indexed: 06/07/2023]
Abstract
A sequencing batch reactor was operated to study the effects of influent Ca2+ on the efficiency, bacterial population, and microbial metabolism of denitrifying phosphorus removal system. Results showed that high Ca2+ loading (≥80mg/L) significantly inhibited the performance of simultaneous nitrogen and phosphorus removal. The abundance of phosphorus removal-related organisms (Dechloromonas and Candidatus Accumulibacter) decreased with increasing Ca2+ concentration from 20 to 140mg/L, while the abundance of glycogen-accumulating organisms and other bacteria increased. Metabolomic analyses revealed that the metabolic profiles of microbial community were also affected by high influent Ca2+ concentrations. 3-Hydroxybutyrate, acetate, alanine, and glutamate were the main differentiated metabolites in the system. An accumulation of amino acids and a reduction of nucleotides and amines were important response to high Ca2+ loading. Long-term Ca2+ loading had a reversible effect on the denitrifying phosphorus removal system as it could revive after a 50-day recovery process.
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Affiliation(s)
- Hongliang Dai
- School of Energy and Environment, Southeast University, No. 2 Sipailou Road, Nanjing 210096, China; ERC Taihu Lake Water Environment (Wuxi), No. 99 Linghu Road, Wuxi 214135, China
| | - Yifeng Wu
- School of Energy and Environment, Southeast University, No. 2 Sipailou Road, Nanjing 210096, China; ERC Taihu Lake Water Environment (Wuxi), No. 99 Linghu Road, Wuxi 214135, China
| | - Lihong Peng
- School of Energy and Environment, Southeast University, No. 2 Sipailou Road, Nanjing 210096, China; ERC Taihu Lake Water Environment (Wuxi), No. 99 Linghu Road, Wuxi 214135, China
| | - Zheqin Dai
- School of Energy and Environment, Southeast University, No. 2 Sipailou Road, Nanjing 210096, China; ERC Taihu Lake Water Environment (Wuxi), No. 99 Linghu Road, Wuxi 214135, China
| | - Xiang Li
- School of Energy and Environment, Southeast University, No. 2 Sipailou Road, Nanjing 210096, China; ERC Taihu Lake Water Environment (Wuxi), No. 99 Linghu Road, Wuxi 214135, China
| | - Xiwu Lu
- School of Energy and Environment, Southeast University, No. 2 Sipailou Road, Nanjing 210096, China; ERC Taihu Lake Water Environment (Wuxi), No. 99 Linghu Road, Wuxi 214135, China.
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