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Yan W, Wang Y, Li Y, Rong C, Wang D, Wang C, Wang Y, Yuen YL, Wong FF, Chui HK, Li YY, Zhang T. Treatment of fresh leachate by anaerobic membrane bioreactor: On-site investigation, long-term performance and response of microbial community. Bioresour Technol 2023; 383:129243. [PMID: 37257727 DOI: 10.1016/j.biortech.2023.129243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 06/02/2023]
Abstract
This study proposed fresh leachate treatment with anaerobic membrane bioreactor (AnMBR) based on the on-site investigation of the characteristics of fresh leachate. Temperature-related profiles of fresh leachate properties, like chemical oxygen demand (COD), were observed. In addition, AnMBR achieved a high COD removal of 98% with a maximum organic loading rate (OLR) of 19.27 kg-COD/m3/d at the shortest hydraulic retention time (HRT) of 1.5 d. The microbial analysis implied that the abundant protein and carbohydrate degraders (e.g., Thermovirga and Petrimonas) as well as syntrophic bacteria, such as Syntrophomonas, ensured the effective adaptation of AnMBR to the reduced HRTs. However, an excessive OLR at 36.55 kg-COD/m3/d at HRT of 1 d resulted in a sharp decrease in key microbes, such as archaea (from 37% to 15%), finally leading to the deterioration of AnMBR. This study provides scientific guidance for treating fresh leachate by AnMBR and its full-scale application for high-strength wastewater.
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Affiliation(s)
- Weifu Yan
- Environmental Microbiome Engineering and Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Yulin Wang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Yemei Li
- 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
| | - Chao Rong
- 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
| | - Dou Wang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Chunxiao Wang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Yubo Wang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Yee-Lok Yuen
- Environmental Protection Department, The Government of the Hong Kong Special Administrative Region, Hong Kong Special Administrative Region
| | - Fanny Fong Wong
- Environmental Protection Department, The Government of the Hong Kong Special Administrative Region, Hong Kong Special Administrative Region
| | - Ho-Kwong Chui
- Environmental Protection Department, The Government of the Hong Kong Special Administrative Region, Hong Kong Special Administrative Region
| | - Yu-You Li
- 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
| | - Tong Zhang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Hong Kong Special Administrative Region.
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Xiang H, Cheng L, Liu W, Wang S, Zhang Y, Su L, Tan C, Li Y. Characteristics of leachate from refuse transfer stations in rural China. Environ Sci Pollut Res Int 2023; 30:3056-3069. [PMID: 35943652 DOI: 10.1007/s11356-022-22449-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
The properties of leachate from refuse transfer stations (RTSs) in rural China were indefinite. In this study, a total of 14 leachate samples from RTSs in nine provinces of China were characterized for their pH, electric conductivity, chromaticity, concentration of organic substances, nitrogen distribution, volatile organic compounds (VOCs), organic phosphorous pesticide, and heavy metals. The structural composition of fluorescent dissolved organic matter (FDOM) was also determined. To evaluate the leachate pollution potential in this study, a leachate pollution index was derived and used. Chromium (Cr) was the most polluting heavy metal present in rural leachate. Ethanol and ethyl acetate were the most frequently detected VOCs at high concentrations. Three-dimensional fluorescence excitation-emission matrix spectra were used to characterize the FDOM. Three components, tryptophan (C1), tyrosine-like (C2), and humic acid- and fulvic acid-like (C3) substances, were identified from all 14 samples. Tryptophan was the major component of FDOM and present in 45.7% of the samples by calculating the fluorescence intensity percentage, on average. Pearson correlations revealed that the fluorescence intensity of C1 and C3 was strongly related to soluble chemical oxygen demand and dissolved oxygen carbon, while C2 had significant positive correlations with ammonia nitrogen and total phosphorus of the solid waste. This study provided detailed data and findings that could serve as a preliminary basis for broadening options for the treatment and management of leachate from rural RTSs in China.
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Affiliation(s)
- Huiming Xiang
- Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences, 8 Jiangwangmiao Street, Nanjing, 210042, People's Republic of China
| | - Le Cheng
- Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences, 8 Jiangwangmiao Street, Nanjing, 210042, People's Republic of China
- College of Civil Engineering and Transportation, Hohai University, No.1 Xikang Road, Nanjing, 210024, People's Republic of China
| | - Weiye Liu
- Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences, 8 Jiangwangmiao Street, Nanjing, 210042, People's Republic of China
- College of Civil Engineering and Transportation, Hohai University, No.1 Xikang Road, Nanjing, 210024, People's Republic of China
| | - Saier Wang
- Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences, 8 Jiangwangmiao Street, Nanjing, 210042, People's Republic of China
| | - Yi Zhang
- Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences, 8 Jiangwangmiao Street, Nanjing, 210042, People's Republic of China
| | - Lianghu Su
- Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences, 8 Jiangwangmiao Street, Nanjing, 210042, People's Republic of China.
| | - Chaoqun Tan
- Department of Municipal Engineering, Southeast University, Nanjing, 211189, People's Republic of China
| | - Yuping Li
- College of Civil Engineering and Transportation, Hohai University, No.1 Xikang Road, Nanjing, 210024, People's Republic of China.
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