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Zajac O, Zielinska M, Zubrowska-Sudol M. Enhancing wastewater treatment efficiency: A hybrid technology perspective with energy-saving strategies. BIORESOURCE TECHNOLOGY 2024; 399:130593. [PMID: 38493937 DOI: 10.1016/j.biortech.2024.130593] [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: 12/16/2023] [Revised: 03/13/2024] [Accepted: 03/14/2024] [Indexed: 03/19/2024]
Abstract
The study aimed to investigate how hybrid technology, combined with various intermittent aeration (IA) strategies, contributes to reducing the energy costs of wastewater treatment while simultaneously ensuring a high treatment efficiency. Even with IA subphases lasting half as long as those without aeration, and oxygen levels reduced from 3.5 to 1.5 mg O2/L, pollutants removal efficiency remains robust, allowing for a 1.41-fold reduction in energy consumption (EO). Hybrid technology led to a 1.34-fold decrease in EO, along with improved denitrification efficiency from 74.05 ± 4.71 to 81.87 ± 2.43 % and enhanced biological phosphorus removal from 35.03 ± 4.25 to 87.32 ± 3.64 %. The high nitrification efficiency may have been attributed to the abundance of Pseudomonas, Acinetobacter, and Rhodococcus, which outcompeted the genera of autotrophic nitrifying bacteria, suggesting that the hybrid system is favorable for the growth of heterotrophic nitrifiers.
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Affiliation(s)
- Olga Zajac
- Department of Water Supply and Wastewater Treatment, Faculty of Building Services Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska 20, 00-653 Warsaw, Poland.
| | - Magdalena Zielinska
- Department of Environmental Biotechnology, University of Warmia and Mazury in Olsztyn, Słoneczna St. 45G, 10-709 Olsztyn, Poland
| | - Monika Zubrowska-Sudol
- Department of Water Supply and Wastewater Treatment, Faculty of Building Services Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska 20, 00-653 Warsaw, Poland
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2
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Luo J, Wu Y, Fu H, Fu M, Liu M, Guo H, Jin L, Wang S. Shift in microorganism and functional gene abundance during completely autotrophic nitrogen removal over nitrite (CANON) process. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 359:121009. [PMID: 38718600 DOI: 10.1016/j.jenvman.2024.121009] [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: 03/01/2024] [Revised: 04/20/2024] [Accepted: 04/22/2024] [Indexed: 05/22/2024]
Abstract
Nitrification-denitrification process has failed to meet wastewater treatment standards. The completely autotrophic nitrite removal (CANON) process has a huge advantage in the field of low carbon/nitrogen wastewater nitrogen removal. However, slow start-up and system instability limit its applications. In this study, the time of the start-up CANON process was reduced by using bio-rope as loading materials. The establishing of graded dissolved oxygen improved the stability of the CANON process and enhanced the stratification effect between functional microorganisms. Microbial community structure and the abundance of nitrogen removal functional genes are also analyzed. The results showed that the CANON process was initiated within 75 days in the complete absence of anaerobic ammonium oxidizing bacteria (AnAOB) inoculation. The ammonium and nitrogen removal efficiencies of CANON process reached to 94.45% and 80.76% respectively. The results also showed that the relative abundance of nitrogen removal bacterial in the biofilm gradually increases with the dissolved oxygen content in the solution decreases. In contrast, the relative abundance of ammonia oxidizing bacteria was positively correlated with the dissolved oxygen content in the solution. The relative abundance of g__Candidatus_Brocadia in biofilm was 15.56%, and while g__Nitrosomonas was just 0.6613%. Metagenomic analysis showed that g__Candidatus_Brocadia also contributes 66.37% to the partial-nitrification functional gene Hao (K10535). This study presented a new idea for the cooperation between partial-nitrification and anammox, which improved the nitrogen removal system stability.
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Affiliation(s)
- Jiajun Luo
- Fujian Engineering and Research Center of Rural Sewage Treatment and Water Safety, Xiamen University of Technology, Xiamen, 361024, China
| | - Yicheng Wu
- Fujian Engineering and Research Center of Rural Sewage Treatment and Water Safety, Xiamen University of Technology, Xiamen, 361024, China
| | - Haiyan Fu
- Fujian Engineering and Research Center of Rural Sewage Treatment and Water Safety, Xiamen University of Technology, Xiamen, 361024, China.
| | - Muxing Fu
- Xiamen Zhongrenhemei Biotechnology Co., Xiamen, 361024, China
| | - Mian Liu
- Fujian Engineering and Research Center of Rural Sewage Treatment and Water Safety, Xiamen University of Technology, Xiamen, 361024, China
| | - Huibin Guo
- Fujian Engineering and Research Center of Rural Sewage Treatment and Water Safety, Xiamen University of Technology, Xiamen, 361024, China
| | - Lei Jin
- Fujian Engineering and Research Center of Rural Sewage Treatment and Water Safety, Xiamen University of Technology, Xiamen, 361024, China
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3
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Deng C, Chen Z, Li Y, Chen H, Chen Y, Zhou S, Niu R, Tan Y. Effective recovery of the nitritation process through hydrogen peroxide. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:28404-28417. [PMID: 38546918 DOI: 10.1007/s11356-024-33056-9] [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: 11/16/2023] [Accepted: 03/20/2024] [Indexed: 04/30/2024]
Abstract
This study successfully achieved stable nitritation by adding hydrogen peroxide (H2O2) to the nitrification sludge whose nitritation stability had been destroyed. The batch experiment demonstrated that, the activity of ammonia-oxidizing bacteria (AOB) was restored more rapidly than that of nitrite oxidizing bacteria (NOB) after the addition of H2O2, thereby selectively promoting AOB enrichment and NOB washout. When the H2O2 concentration was 6.25 mg/L, the NOB activity was significantly reduced and the nitrite accumulation rate (NAR) was more than 95% after 18 cycles of nitrifying sludge restoration. As a result, H2O2 treatment enabled a nitrifying reactor to recover stable nitritation performance via H2O2 treatment, with the NAR and ammonia removal efficiency (ARE) both exceeding 90%. High-throughput sequencing analysis revealed that H2O2 treatment was successful in restoring nitritation, as the relative abundance of Nitrosomonas in the nitrifying reactor increased from 6.43% to 41.97%, and that of Nitrolancea decreased from 17.34% to 2.37%. Recovering nitritation by H2O2 inhibition is a low operational cost, high efficiency, and non-secondary pollution nitritation performance stabilization method. By leveraging the varying inhibition degrees of H2O2 on AOB and NOB, stable nitrification can be efficiently restored at a low cost and without causing secondary pollution.
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Affiliation(s)
- Cuilan Deng
- Guangzhou Baiyun Technology Co., Ltd., Guangzhou, 510000, China
| | - Zhenguo Chen
- School of Environment, South China Normal University, Guangzhou, 510006, China.
- Hua An Biotech Co., Ltd., Foshan, 528300, China.
| | - Yonggan Li
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Haochuan Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Yongxing Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | | | - Rong Niu
- Guangzhou Baiyun Technology Co., Ltd., Guangzhou, 510000, China
| | - Yuemin Tan
- Guangzhou Baiyun Technology Co., Ltd., Guangzhou, 510000, China
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4
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Zhang X, Li X, Zhang L, Peng Y. Enhancing nitrogen removal performance through intermittent aeration in continuous plug-flow anaerobic/aerobic/anoxic process treating low-strength municipal sewage. BIORESOURCE TECHNOLOGY 2024; 391:129979. [PMID: 37926355 DOI: 10.1016/j.biortech.2023.129979] [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: 09/18/2023] [Revised: 11/02/2023] [Accepted: 11/02/2023] [Indexed: 11/07/2023]
Abstract
Advanced nitrogen removal cannot be achieved through the conventional biological nitrogen removal process, which requires higher carbon sources and aeration energy. The proposal of intermittent aeration in the aerobic chambers offered an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio (C/N) municipal sewage, using a plug-flow reactor with anaerobic/aerobic/anoxic (AOA) process. Due to the effective utilization of internal carbon sources through the intermittent aeration, the total inorganic nitrogen removal efficiency (NRE) increased to 77.9 ± 3.2 % with the mean aerobic hydraulic retention time of only 3.2 h and a low C/N of 3.3 during the operation of 210 days. Polyhydroxyalkanoates dominated the nitrogen removal in this AOA system, accounting for 48.0 %, primarily occurring in the alternant aerobic/anoxic chambers. Moreover, the microbial community structure remained unchanged while the NRE increased to 77.9 %. This study provided an efficient and economic strategy for the continuous plug-flow AOA process.
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Affiliation(s)
- Xiyue Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, 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, PR China.
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Men Y, Liu L, Wang S, Bi Y, Meng F, Qiu C, Wang D, Yu J, Yang Y. Extracellular polymeric substances and microbial community shift during the start-up of a single-stage partial nitritation/anammox process. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2023; 95:e10931. [PMID: 37759340 DOI: 10.1002/wer.10931] [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: 07/04/2023] [Revised: 08/17/2023] [Accepted: 09/22/2023] [Indexed: 09/29/2023]
Abstract
A sequencing batch reactor (SBR) was operated to investigate variations of extracellular polymeric substances (EPS) and microbial community during the start-up of the single-stage partial nitritation/anammox (SPN/A) process at intermittent aeration mode. The SPN/A system was successfully started on day 34, and the nitrogen removal efficiency and total nitrogen loading rate were 82.29% and 0.31 kg N/(m3 ·day), respectively. Furthermore, the relationship between the protein secondary structures and microbial aggregation was strongly related. The α-helix/ (β-sheet + random coil) ratios increased obviously from 0.20 ± 0.03 to 0.23 ± 0.01, with the sludge aggregation mean size increased from 56 to 107 μm during the start-up of SPN/A. During the start-up of SPN/A, Candidatus Kuenenia was the primary anammox bacteria, whereas Nitrospira was the main functional bacteria of nitrite-oxidizing bacteria. Correlation between the microbial community and EPS components was performed. The EPS and microbial community played important roles in keeping stable nitrogen removal and the formation of sludge granules. PRACTITIONER POINTS: Intermittent aeration strategy promoted SPN/A system start-up. EPS composition and protein secondary structure were related with the sludge disintegration and aggregation. Microbial community shift existed and promoted the stability of sludge and reactor performance during SPN/A start-up.
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Affiliation(s)
- Yan Men
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
| | - Lingjie Liu
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
| | - Shaopo Wang
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
| | - Yanmeng Bi
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
| | - Fansheng Meng
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
| | - Chunsheng Qiu
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
| | - Dong Wang
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
| | - Jingjie Yu
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
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Zhao J, Dong X, Su H, Huang J, Liu Z, He P, Zhang D. Rapid start-up of PN/A process and efficient enrichment of functional bacteria: A novel aerobic-biofilm/anaerobic-granular nitrogen removal system (OANRS). BIORESOURCE TECHNOLOGY 2023; 380:128944. [PMID: 36963701 DOI: 10.1016/j.biortech.2023.128944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/14/2023] [Accepted: 03/20/2023] [Indexed: 05/03/2023]
Abstract
Reactor configuration, control strategy and inoculation method were key factors affecting the rapid start-up of partial nitrification/anammox (PN/A) process and the efficient enrichment of functional bacteria (anammox and ammonia oxidizing bacteria). At present, PN/A process was generally operated through single factor rather than forming a system. In this study, a novel aerobic-biofilm/anaerobic-granular nitrogen removal system (OANRS) was constructed, which consisted of a multi-stage aerobic-biofilm/anaerobic-granular baffle reactor (MOABR) and a control strategy on pH/aeration time. PN process was started within 10d, and PN/A process was started on the basis of stable PN process within 41d. The simultaneous enrichment of functional bacteria was achieved by combining the advantages of single-stage and two-stage PN/A process. The results of high-throughput sequencing showed that Candidatus Kuenenia (20.42 ± 15.88%) was highly enriched in each compartment at day 98, and the relative abundance of Candidatus Kuenenia in the anaerobic compartment R4 was as high as 43.13%.
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Affiliation(s)
- Jiejun Zhao
- CCCC(Tianjin)Eco-Environmental Protection Design & Research Institute Co, Tianjin 300000, PR China; Jiangxi University of Science and Technology, School of Resources and Environmental Engineering, Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi Province, Ganzhou City 341000, PR China
| | - Xianfeng Dong
- CCCC(Tianjin)Eco-Environmental Protection Design & Research Institute Co, Tianjin 300000, PR China
| | - Hao Su
- Jiangxi University of Science and Technology, School of Resources and Environmental Engineering, Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi Province, Ganzhou City 341000, PR China
| | - Jiayin Huang
- CCCC(Tianjin)Eco-Environmental Protection Design & Research Institute Co, Tianjin 300000, PR China
| | - Zuwen Liu
- Jiangxi University of Science and Technology, School of Resources and Environmental Engineering, Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi Province, Ganzhou City 341000, PR China
| | - Pan He
- CCCC(Tianjin)Eco-Environmental Protection Design & Research Institute Co, Tianjin 300000, PR China
| | - Dachao Zhang
- Jiangxi University of Science and Technology, School of Resources and Environmental Engineering, Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi Province, Ganzhou City 341000, PR China.
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Chen J, Liang J, Li C, Dai J, Mai W, Wei Y. An enriched ammonia-oxidizing microbiota enables high removal efficiency of ammonia in antibiotic production wastewater. CHEMOSPHERE 2023; 310:136854. [PMID: 36243093 DOI: 10.1016/j.chemosphere.2022.136854] [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: 03/02/2022] [Revised: 08/22/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
High ammonia concentration hinders the efficient treatment of antibiotic production wastewater (APW). Developing effective ammonia oxidation wastewater treatment strategies is an ideal approach for facilitating APW treatment. Compared with traditional nitrification strategies, the partial nitrification process is more eco-friendly, less energy-intensive, and less excess sludge. The primary limiting factor of the partial nitrification process is increasing ammonia-oxidizing bacteria (AOB) while decreasing nitrite-oxidizing bacteria (NOB). In this study, an efficient AOB microbiota (named AF2) was obtained via enrichment of an aerobic activated sludge (AS0) collected from a pharmaceutical wastewater treatment plant. After a 52-day enrichment of AS0 in 250 mL flasks, the microbiota AE1 with 69.18% Nitrosomonas microorganisms was obtained. Subsequent scaled-up cultivation in a 10 L fermenter led to the AF2 microbiota with 59.22% Nitrosomonas. Low concentration of free ammonia (FA, < 42.01 mg L-1) had a negligible effect on the activity of AF2, and the nitrite-nitrogen accumulation rate (NAR) of AF2 was 98% when FA concentration was 42.01 mg L-1. The specific ammonia oxidation rates (SAORs) at 30 °C and 15 °C were 3.64 kg NH4+-N·kg MLVSS-1·d-1 and 1.43 kg NH4+-N·kg MLVSS-1·d-1 (MLVSS: mixed liquor volatile suspended solids). The SAOR was 0.52 kg NH4+-N·kg MLVSS-1·d-1 when the NaCl concentration was increased from 0 to 20 g L-1, showing that AF2 functioning was stable in a high-level salt environment. The ammonia oxidation performance of AF2 was verified by treating abamectin and lincomycin production wastewater. The NARs of AF2 used for abamectin and lincomycin production wastewater treatment were >90% and the SAORs were 2.39 kg NH4+-N·kg MLVSS-1·d-1 and 0.54 kg NH4+-N·kg MLVSS-1·d-1, respectively, which was higher than the traditional biological denitrification process. In summary, AF2 was effective for APW treatment via enhanced ammonia removal efficiency, demonstrating great potential for future industrial wastewater treatment.
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Affiliation(s)
- Jiamin Chen
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, 450001, PR China
| | - Jiawei Liang
- College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, PR China; Research Center for Eco-friendly Wastewater Purifying Engineering Technology of Henan Province, Henan Junhe Environmental Protection Technology CO.LTD, Zhengzhou, Henan, 450001, PR China
| | - Chenjing Li
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, 450001, PR China
| | - Jihua Dai
- Research Center for Eco-friendly Wastewater Purifying Engineering Technology of Henan Province, Henan Junhe Environmental Protection Technology CO.LTD, Zhengzhou, Henan, 450001, PR China
| | - Wenning Mai
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, 450001, PR China; College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, PR China.
| | - Yongjun Wei
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China; Laboratory of Synthetic Biology, Zhengzhou University, Zhengzhou, 450051, PR China.
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Rong C, Luo Z, Wang T, Qin Y, Wu J, Guo Y, Hu Y, Kong Z, Hanaoka T, Sakemi S, Ito M, Kobayashi S, Kobayashi M, Li YY. Biomass retention and microbial segregation to offset the impacts of seasonal temperatures for a pilot-scale integrated fixed-film activated sludge partial nitritation-anammox (IFAS-PN/A) treating anaerobically pretreated municipal wastewater. WATER RESEARCH 2022; 225:119194. [PMID: 36215833 DOI: 10.1016/j.watres.2022.119194] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 07/17/2022] [Accepted: 09/30/2022] [Indexed: 05/06/2023]
Abstract
Partial nitritation-anammox (PN/A) is a promising deammonification process to develop energy-neutral wastewater treatment plants. However, the mainstream application of PN/A still faces the challenges of low nitrogen concentration and low temperatures, and has not been studied under a realistic condition of large-scale reactor (kiloliter level), real municipal wastewater (MWW) and seasonal temperatures. In this research, a pilot-scale one-stage PN/A, with integrated fixed-film activated sludge (IFAS) configuration, was operated to treat the real MWW pretreated by anaerobic membrane bioreactor. The removal efficiency of total nitrogen (TN) was 79.4%, 75.7% and 65.9% at 25, 20 and 15°C, corresponding to the effluent TN of 7.3, 9.7 and 12.0 mg/L, respectively. The suppression of ammonium-oxidizing bacteria (AOB) and anammox bacteria (AnAOB) occurred at lower temperatures, and the significant decrease in AOB treatment capacity was the reason for the poorer nitrogen removal at 15°C. Biomass retention and microbial segregation were successfully achieved. Specifically, Candidatus_Brocadia and Candidatus_Kuenenia were main AnAOB genera and mainly enriched on carriers, Nitrosomonas and uncultured f_Chitinophagaceae were main AOB genera and mainly distributed in suspended sludge and retained by sedimentation tank. Moreover, nitrite-oxidizing bacteria (NOB) were sufficiently suppressed by intermittent aeration and low dissolved oxygen, the presence of heterotrophic bacteria upgraded the PN/A to a simultaneous partial nitritation, anammox, denitrification, and COD oxidation (SNADCO) system, which improved the overall removal of TN and COD. The results of this investigation clearly evidence the strong feasibility of PN/A as a mainstream nitrogen removal process in temperate climates.
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Affiliation(s)
- Chao Rong
- Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan
| | - Zibin Luo
- Laboratory of Environmental Protection Engineering, Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan
| | - Tianjie Wang
- Laboratory of Environmental Protection Engineering, Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan
| | - Yu Qin
- Laboratory of Environmental Protection Engineering, Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan
| | - Jiang Wu
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba 305-8506, Japan
| | - Yan Guo
- Department of Environmental Engineering, University of Science and Technology Beijing, Xueyuan Road, Haidian District, Beijing 100083, China
| | - Yisong Hu
- Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Zhe Kong
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Taira Hanaoka
- Solution Engineering Group, Environmental Engineering Department, Mitsubishi Kakoki Kaisha, Ltd., 1-2 Miyamae-Cho, Kawasaki-Ku, Kawasaki, Kanagawa 210-0012, Japan
| | - Shinichi Sakemi
- Solution Engineering Group, Environmental Engineering Department, Mitsubishi Kakoki Kaisha, Ltd., 1-2 Miyamae-Cho, Kawasaki-Ku, Kawasaki, Kanagawa 210-0012, Japan
| | - Masami Ito
- Global Water Recycling and Reuse System Association, Japan, 5-1, Soto-Kanda 1-Chome, Chiyoda-Ku, Tokyo 101-0021, Japan
| | - Shigeki Kobayashi
- Global Water Recycling and Reuse System Association, Japan, 5-1, Soto-Kanda 1-Chome, Chiyoda-Ku, Tokyo 101-0021, Japan
| | - Masumi Kobayashi
- Separation and Aqua Chemicals Department, Mitsubishi Chemical Corporation, Gate City Osaki East Tower, 11-2 Osaki 1-chome, Shinagawa-Ku, Tokyo 141-0032, Japan
| | - Yu-You Li
- Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan; Laboratory of Environmental Protection Engineering, Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan.
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9
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Lu Q, Zhou J, Zhu G, Tan C, Chen S, Zhu X, Yan N, Zhang Y, Xu Q, Pan B, Rittmann BE. Anoxic/oxic treatment without biomass recycle. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 834:155166. [PMID: 35413348 DOI: 10.1016/j.scitotenv.2022.155166] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/06/2022] [Accepted: 04/06/2022] [Indexed: 06/14/2023]
Abstract
The Anoxic/Oxic (A/O) process involves recirculating mixed liquor between its A and O tanks so that nitrate produced in the O tank can be used to for denitrification with influent COD in the A tank. Because biomass is recirculated along with nitrate, A/O operation leads to similar microbial communities in the A and O tanks, which may decrease the rates of denitrification and nitrification in each tank. Here, bench-scale experiments simulated this aspect of the A/O process by exchanging biomass between an anoxic flask and an oxic cylinder at exchange ratios of 0%, 20%, 30%, and 50%. Nitrification and denitrification rates were only 40% and 19% for 50% biomass exchange of that for no biomass exchange. Phylogenetic analysis documented that the microbial communities became much more similar with biomass exchange, and the finding was consistent with community composition in a full-scale A/O process in a municipal wastewater treatment plant. A two-stage vertical baffled bioreactor (VBBR) realized efficient total‑nitrogen removal in recirculation without biomass exchange. Average removals of COD and TN were respectively 6% and 22% higher for the two-stage VBBR than the conventional A/O process, but its hydraulic retention time (HRT) was 55% to 70% of the volume of a conventional A/O process treating the same influent wastewater. The VBBR was more efficient because its anoxic biofilm was enriched in denitrifying bacteria, while its oxic biofilm was enriched in nitrifying bacteria. For example, the phylum Chloroflexi was greater in the An-VBBR, while the phylum Proteobacteria was greater in the Ox-VBBR.
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Affiliation(s)
- Qinyuan Lu
- Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai 200234, PR China; State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Junqing Zhou
- Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai 200234, PR China
| | - Ge Zhu
- Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai 200234, PR China
| | - Chong Tan
- Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai 200234, PR China
| | - Songyun Chen
- Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai 200234, PR China
| | - Xiaohui Zhu
- Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai 200234, PR China
| | - Ning Yan
- Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai 200234, PR China
| | - Yongming Zhang
- Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai 200234, PR China.
| | - Qiuen Xu
- Zhongke Sanjing Environmental Protection Co., Ltd, Anxi, Fujian 362400, PR China
| | - Bifeng Pan
- Zhongke Sanjing Environmental Protection Co., Ltd, Anxi, Fujian 362400, PR China
| | - Bruce E Rittmann
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ 85287-5701, USA
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Qiu J, Li X, Peng Y, Jiang H. Advanced nitrogen removal from landfill leachate via a two-stage combined process of partial nitrification-Anammox (PNA) and partial denitrification-Anammox (PDA). THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 810:151186. [PMID: 34699827 DOI: 10.1016/j.scitotenv.2021.151186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/18/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
In this study, a two-stage combined process of partial nitrification-Anammox (PNA) and partial denitrification-Anammox (PDA) was established achieving advanced nitrogen removal from landfill leachate. The PNA sludge used to treat reject water adapted to the leachate in 37 days, resulting in fast start-up of the PNA process with a nitrogen removal rate (NRR) of 0.22 kgN/(m3·d). Partial denitrification (PD) was induced using sodium acetate and proceeded in a stepwise manner using sludge fermentation liquid (SFL), achieving a NO3--N to NO2--N transformation ratio (NTR) of 52.1 ± 1.1% within 16 days. PDA was established via the addition of mature Anammox biofilms. The nitrogen removal efficiency (NRE) of this system was 97.6 ± 1.5%, of which PNA and PDA contributed 74.8 ± 4.0% and 18.7 ± 4.1%, respectively. Nitrosomonas (2.6% in PNA), Thauera (16.0% in PDA) and Candidatus Brocadia (23.0% in PNA, 1.4% in PDA) were dominant in the two-stage system. This study provides valuable and novel insights, supporting the practical application of PNA-PDA processes in landfill sites.
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Affiliation(s)
- Jingang Qiu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, 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, PR China..
| | - Hao Jiang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
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Wang H, Yang M, Liu K, Yang E, Chen J, Wu S, Xie M, Wang D, Deng H, Chen H. Insights into the synergy between functional microbes and dissolved oxygen partition in the single-stage partial nitritation-anammox granules system. BIORESOURCE TECHNOLOGY 2022; 347:126364. [PMID: 34838634 DOI: 10.1016/j.biortech.2021.126364] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/10/2021] [Accepted: 11/13/2021] [Indexed: 06/13/2023]
Abstract
The rapid start-up and stable operation of the single-stage partial nitritation-anammox (PNA) process remains a challenge in practical applications. An integrated investigation of nitrogen removal performance, sludge characteristics, activity and abundance, and microbial dynamics was implemented for 360 days via an airlift internal circulation reactor. During long-term operation, the reactor realized a stable dissolved oxygen (DO) partition and cultivated granular sludge. The nitrogen removal rate increased from 0.15 kg-N/m3/d to 1.24 kg-N/m3/d, and a high nitrogen removal efficiency of 82.6% was obtained. A stable DO partition further accelerated the bioreaction rates and enhanced the activity of functional microbes. The activities of ammonia oxidation and anammox reached 1.21 g-N/g-VSS/d and 1.43 g-N/g-VSS/d, respectively. Sludge granulation efficiently enriched the abundances of Candidatus Brocadia (7.4%) and Nitrosomonas (5.2%). These results demonstrated that efficient DO partition and stable culture of granular sludge could enhance the synergy of functional microbes for autotrophic nitrogen removal.
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Affiliation(s)
- Hong Wang
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410004, PR China
| | - Min Yang
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, PR China
| | - Ke Liu
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410004, PR China
| | - Enzhe Yang
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410004, PR China
| | - Jing Chen
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410004, PR China
| | - Sha Wu
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410004, PR China
| | - Min Xie
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410004, PR China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China
| | | | - Hong Chen
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410004, PR China.
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Xu PP, Meng J, Li X, Li J, Sun K, Liu BF, Zheng M. Insights into complete nitrate removal in one-stage nitritation-anammox by coupling heterotrophic denitrification. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 298:113431. [PMID: 34352480 DOI: 10.1016/j.jenvman.2021.113431] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 07/20/2021] [Accepted: 07/27/2021] [Indexed: 06/13/2023]
Abstract
Nitritation-anammox has been considered to be the most promising process for nitrogen (N) removal from wastewater. However, the anammox reaction still produces an amount of nitrate, which cannot be removed further. This study hypothesizes that heterotrophic denitrification can be an appealing option to remove the residual nitrate in the one-stage nitritation-anammox process. Through monitoring N-removal performance and microbial community succession of a laboratory microaerobic reactor, the effect of four different levels of oxygen supply on nitrate removal was investigated. The reactor was continuously fed with real manure-free piggery wastewater containing ~240 mg NH4+-N/L and chemical oxygen demand (COD)/total nitrogen (TN) ratio of less than 1 for 180 days. With a high influent loading rate of 0.7 kg N/(m3·d), efficient total nitrogen removal (>80 %) was achieved during stable operation of dissolved oxygen (DO) concentrations between 0.3 and 0.6 mg O2/L, indicating N-removal via the nitritation-anammox pathway in the low-carbon wastewater treatment. At the same time, the effluent nitrate reduced with decreased oxygen supply and completely depleted at DO of 0.3 ± 0.1 mg O2/L. In addition to oxygen, preventing ammonia nitrogen from falling to very low levels (<10 mg/L) could be also useful for the complete nitrate removal and stable nitritation-anammox. 16S rRNA gene-based analyses confirmed a complex microbial community including nitrifiers, denitrifiers and anammox bacteria in the biomass of the reactor. Collectively, this study provides new insights into high-level N-removal of a nitritation-anammox process by complete nitrate depletion.
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Affiliation(s)
- Pian-Pian Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, PR China
| | - Jia Meng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, PR China.
| | - Xianhui Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, PR China
| | - Jiuling Li
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia
| | - Kai Sun
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, PR China
| | - Bing-Feng Liu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, PR China
| | - Min Zheng
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia
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Toxic Effect of Ammonium Nitrogen on the Nitrification Process and Acclimatisation of Nitrifying Bacteria to High Concentrations of NH4-N in Wastewater. ENERGIES 2021. [DOI: 10.3390/en14175329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The aim of the conducted research was to assess the effectiveness of the nitrification process, at different concentrations of ammonium nitrogen, in biologically treated wastewater in one of the largest municipal and industrial wastewater treatment plants in Poland. The studies also attempted to acclimate nitrifying bacteria to the limited concentration of ammonium nitrogen and determined the efficiency of nitrification under the influence of acclimated activated sludge in the biological wastewater treatment system. The obtained results indicate that the concentration of ammonium nitrogen above 60.00 mg·dm−3 inhibits nitrification, even after increasing the biomass of nitrifiers. The increase in the efficiency of the nitrification process in the tested system can be obtained by using the activated sludge inoculated with nitrifiers. For this purpose, nitrifiers should be preacclimated, at least for a period of time, allowing them to colonize the activated sludge. The acclimated activated sludge allows reducing the amount of ammonium nitrogen in treated sewage by approx. 35.0%. The process of stable nitrification in the biological treatment system was observed nine days after introducing the acclimated activated sludge into the aeration chamber.
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