|
1
|
Li Y, Chen Z, Huang Y, Zheng C, Lu S, Wang X, Zhang C, Yi X, Huang M. Response mechanism of a highly efficient partial nitritation-anammox (PN/A) process under antibiotic stress: Extracellular polymers, microbial community, and functional genes. ENVIRONMENTAL RESEARCH 2024; 251:118575. [PMID: 38431068 DOI: 10.1016/j.envres.2024.118575] [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: 12/20/2023] [Revised: 02/18/2024] [Accepted: 02/26/2024] [Indexed: 03/05/2024]
Abstract
The Partial nitritation-Anammox (PN/A) process can be restricted when treating high ammonia nitrogen wastewater containing antibiotics. This study aims to explore the response mechanism of the PN/A process under antibiotic stress. Results showed the PN/A process achieved a nitrogen removal rate higher than 1.01 ± 0.03 kg N/m3/d under long-term sulfamethazine stress. The increase of extracellular polymers from 22.52 to 43.96 mg/g VSS was conducive to resisting antibiotic inhibitory. The increase of Denitratisoma and SM1A02 abundance as well as functional genes nirS and nirK indicated denitrifiers should play an important role in the stability of the PN/A system under sulfamethazine stress. In addition, antibiotic-resistant genes (ARGs) sul1 and intI1 significantly increased by 8.78 and 5.12 times of the initial values to maintain the resistance of PN/A process to sulfamethazine stress. This study uncovers the response mechanism of the PN/A process under antibiotic stress, offering a scientific basis and guidance for further application in the future.
Collapse
Affiliation(s)
- Yingqiang Li
- Guangdong Provincial Engineering Research Center of Intelligent Low-carbon Pollution Prevention and Digital Technology & Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, People's Republic of China; SCNU (NAN'AN) Green and Low-carbon Innovation Center, Nan'an SCNU Institute of Green and Low-carbon Research, Quanzhou 362300, People's Republic of China; Huashi(Fujian) Environment Technology Co. Ltd, Quanzhou, 362001, People's Republic of China
| | - Zhenguo Chen
- Guangdong Provincial Engineering Research Center of Intelligent Low-carbon Pollution Prevention and Digital Technology & Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, People's Republic of China; SCNU (NAN'AN) Green and Low-carbon Innovation Center, Nan'an SCNU Institute of Green and Low-carbon Research, Quanzhou 362300, People's Republic of China.
| | - Yuexiang Huang
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang 330013, People's Republic of China
| | - Chunying Zheng
- Guangdong Provincial Engineering Research Center of Intelligent Low-carbon Pollution Prevention and Digital Technology & Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, People's Republic of China; SCNU (NAN'AN) Green and Low-carbon Innovation Center, Nan'an SCNU Institute of Green and Low-carbon Research, Quanzhou 362300, People's Republic of China
| | - Simin Lu
- Guangdong Provincial Engineering Research Center of Intelligent Low-carbon Pollution Prevention and Digital Technology & Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, People's Republic of China; SCNU (NAN'AN) Green and Low-carbon Innovation Center, Nan'an SCNU Institute of Green and Low-carbon Research, Quanzhou 362300, People's Republic of China
| | - Xinzhi Wang
- Guangdong Provincial Engineering Research Center of Intelligent Low-carbon Pollution Prevention and Digital Technology & Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, People's Republic of China; SCNU (NAN'AN) Green and Low-carbon Innovation Center, Nan'an SCNU Institute of Green and Low-carbon Research, Quanzhou 362300, People's Republic of China
| | - Chao Zhang
- Guangdong Provincial Engineering Research Center of Intelligent Low-carbon Pollution Prevention and Digital Technology & Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, People's Republic of China; SCNU (NAN'AN) Green and Low-carbon Innovation Center, Nan'an SCNU Institute of Green and Low-carbon Research, Quanzhou 362300, People's Republic of China
| | - Xiaohui Yi
- Guangdong Provincial Engineering Research Center of Intelligent Low-carbon Pollution Prevention and Digital Technology & Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, People's Republic of China; SCNU (NAN'AN) Green and Low-carbon Innovation Center, Nan'an SCNU Institute of Green and Low-carbon Research, Quanzhou 362300, People's Republic of China; Huashi(Fujian) Environment Technology Co. Ltd, Quanzhou, 362001, People's Republic of China
| | - Mingzhi Huang
- Guangdong Provincial Engineering Research Center of Intelligent Low-carbon Pollution Prevention and Digital Technology & Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, People's Republic of China; SCNU (NAN'AN) Green and Low-carbon Innovation Center, Nan'an SCNU Institute of Green and Low-carbon Research, Quanzhou 362300, People's Republic of China; Huashi(Fujian) Environment Technology Co. Ltd, Quanzhou, 362001, People's Republic of China.
| |
Collapse
|
|
2
|
Zhou L, Guo F, Jiang Y, Liu W, Meng F, Wang C. A pilot-scale SNAD-MBBR process for treating anaerobic digester liquor of swine wastewater: performance and microbial community. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:120329-120339. [PMID: 37936048 DOI: 10.1007/s11356-023-30840-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 10/30/2023] [Indexed: 11/09/2023]
Abstract
In this pilot-scale study, simultaneous partial nitrification, anammox, and denitrification (SNAD) process was achieved successfully in a moving bed biofilm reactor (MBBR) for treating anaerobic digester liquor of swine wastewater. After 95 days of operation, when the total nitrogen loading rate of SNAD-MBBR process was 1.09 kg TN/m3/day, the total nitrogen removal rate could reach 0.87 kg TN/m3/day, and the removal efficiencies of ammonium and total nitrogen were 92.0% and 79.7%, respectively. The optimum pH and temperature for SNAD-MBBR process were 8.5 and 35 °C, respectively, and the optimum dissolved oxygen for SNAD1 and SNAD2 were 0.30 and 0.07 mg/L, respectively. The 16S rRNA sequencing suggested that Candidatus Kuenenia, Candidatus Brocadia, Nitrosomonas, and Denitratisoma were the dominant nitrogen removal bacteria. Some of the co-existing bacteria (Truepera, Limnobacter, and Anaerolineaceae uncultured) promoted ammonium oxidation and guaranteed the growth of the anammox bacteria under adverse environmental conditions. Overall, this study demonstrated that the SNAD-MBBR process would be an energy-saving and cost-effective method for the removal of nitrogen from swine wastewater and provided important process parameters for stable operation of the full-scale SNAD process.
Collapse
Affiliation(s)
- Liang Zhou
- Jiangsu Provincial Key Laboratory of Environmental Engineering, Nanjing, 210000, People's Republic of China
- Jiangsu Environmental Engineering Technology Co., Ltd, Nanjing, 210000, People's Republic of China
| | - Fangzheng Guo
- Jiangsu Environmental Engineering Technology Co., Ltd, Nanjing, 210000, People's Republic of China
| | - Yongwei Jiang
- Jiangsu Environmental Engineering Technology Co., Ltd, Nanjing, 210000, People's Republic of China
| | - Weijing Liu
- Jiangsu Provincial Key Laboratory of Environmental Engineering, Nanjing, 210000, People's Republic of China
| | - Fangang Meng
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, 510006, People's Republic of China
| | - Chao Wang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, 510006, People's Republic of China.
| |
Collapse
|
|
3
|
Li Y, Chen Z, Zhang Y, Wang Z, Zhang C, Deng Z, Huang L, Wang X, Fan J, Zhou S. Response of partial nitritation and denitrification processes to high levels of free ammonia in a pilot mature landfill leachate treatment system: Stability and microbial community dynamics. BIORESOURCE TECHNOLOGY 2023; 387:129571. [PMID: 37506935 DOI: 10.1016/j.biortech.2023.129571] [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: 06/13/2023] [Revised: 07/16/2023] [Accepted: 07/25/2023] [Indexed: 07/30/2023]
Abstract
The high levels of free ammonia (FA) challenge the application of partial nitritation (PN) and denitrification (DN) in the treatment of ammonia-rich wastewater. This study explored the impact of high levels of FA on the PN and DN stability and microbial community dynamics. By reducing reflux and increasing influent load, the concentrations of FA in PN and DN reactors increased from 28.9 mg/L and 140.0 mg/L to 1099.8 mg/L and 868.4 mg/L, respectively. During this process, the performance of PN and DN remained stable. The microbial analysis revealed that the Nitrosomonas exhibited strong tolerance to high levels of FA, and its relative abundance was positively correlated with amoABC (R2 0.984) and hao (R2 0.999) genes. The increase in microbial diversity could enhance the resistance ability of PN against the FA impact. In contrast, high levels of FA had scant influence on the microbial community and performance of DN.
Collapse
Affiliation(s)
- Yonggan Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China
| | - Zhenguo Chen
- School of Environment, South China Normal University, Guangzhou 510006, China
| | - Yangzhong Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China
| | - Zhiyu Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China
| | - Chuchu Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China
| | - Zexi Deng
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China
| | - Linxiang Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China
| | - Xiaojun Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China; Hua an Biotech Co., Ltd., Foshan 528300, China.
| | - Junhao Fan
- Hua an Biotech Co., Ltd., Foshan 528300, China
| | | |
Collapse
|
|
4
|
Li Y, Chen Z, Zhou S, Fan J, Huang L, Deng Z, Zhang C, Wang X. Improving stability and nitrogen removal performance of pilot-scale autotrophic process for mature landfill leachate treatment utilizing in-situ organics. BIORESOURCE TECHNOLOGY 2023; 381:129118. [PMID: 37141999 DOI: 10.1016/j.biortech.2023.129118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/20/2023] [Accepted: 04/27/2023] [Indexed: 05/06/2023]
Abstract
This study established a stable and efficient pilot-scale denitrification (DN) and partial nitritation (PN) combined with autotrophic nitrogen removal process for mature landfill leachate treatment. A total inorganic nitrogen removal efficiency (TINRE) of 95.3% was achieved without any external carbon source input, including 17.1%, 1.0% and 77.2% of nitrogen removal contributed by the DN, PN and autotrophic processes, respectively. ANAMMOX genus, Ca_Anammoxoglobus (19.4%) was dominant in autotrophic reactor. Moreover, denitrifying bacteria could utilize in-situ organics, including poorly degradable organics, to enhance the nitrogen removal performance of autotrophic process, contributing 3.4% of TINRE. This study provides new insights for the economical, low-carbon, and efficient treatment of mature landfill leachate.
Collapse
Affiliation(s)
- Yonggan Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China
| | - Zhenguo Chen
- School of Environment, South China Normal University, Guangzhou 510006, China
| | | | - Junhao Fan
- Hua an Biotech Co., Ltd., Foshan 528300, China
| | - Linxiang Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China
| | - Zexi Deng
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China
| | - Chuchu Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China
| | - Xiaojun Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China; Hua an Biotech Co., Ltd., Foshan 528300, China.
| |
Collapse
|