Municipal solid waste leachate treatment by three-stage membrane aeration biofilm reactor system.

Autor: Li X; Tianjin Key Laboratory of Environmental Technology for Complex Trans-media Pollution, Carbon Neutrality Interdisciplinary Science Centre, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China., Xiao L; Hydroking Science and Technology Co., Ltd., Tianjin, 300384, PR China., Sui X; Taihuan Regeneration Resource Utilization Co., Ltd., Tianjin, 300304, PR China., Li M; School of Resources and Environment (College of Carbon Neutrality), Linyi University, Shandong, 276005, PR China., Wang N; Tianjin Key Laboratory of Environmental Technology for Complex Trans-media Pollution, Carbon Neutrality Interdisciplinary Science Centre, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China., Sun Z; Tianjin Key Laboratory of Environmental Technology for Complex Trans-media Pollution, Carbon Neutrality Interdisciplinary Science Centre, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China., Li T; Tianjin Key Laboratory of Environmental Technology for Complex Trans-media Pollution, Carbon Neutrality Interdisciplinary Science Centre, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China., Cao X; Tianjin Key Laboratory of Environmental Technology for Complex Trans-media Pollution, Carbon Neutrality Interdisciplinary Science Centre, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China., Li B; Tianjin Key Laboratory of Environmental Technology for Complex Trans-media Pollution, Carbon Neutrality Interdisciplinary Science Centre, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China. Electronic address: libaoan@nankai.edu.cn.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2024 Sep; Vol. 363, pp. 142847. Date of Electronic Publication: 2024 Jul 14.
DOI: 10.1016/j.chemosphere.2024.142847
Abstrakt: A combined process of coagulation pretreatment and three-stage membrane aeration biofilm reactor (MABR) system was successfully applied for the first time to treat actual municipal solid waste leachate (MSWL), which was characterized by high concentrations of toxic hard-to-degrade organics and salinity. The results showed that 9.8%-21.3% of organics could be removed from actual MSWL by coagulation with polymeric aluminum chloride (PAC). Three-stage MABR contributed 95.6% of the chemical oxygen demand (COD) removal, with the influent COD concentration ranging from 6000 to 7000 mg/L. At the same time, the removal efficiencies of total nitrogen (TN) and ammonia (NH 4 + -N) could reach to 84.3% and 79.9% without the addition of external carbon source, respectively. The nitrifying/denitrifying bacteria were enriched in the biofilm including Thiobacillus, Azoarcus and Methyloversatilis, which supported the MABR with high nitrogen removal efficiency and significantly toxic tolerance. Principal component analysis (PCA) and the Pearson correlation coefficients (r) illustrated that aeration pressure is a crucial operational parameter, exhibiting a strong correlation between the MABR performance and microbial communities. This work demonstrates that MABR is an effective and low-energy option for simultaneous removal of carbon and nitrogen in the treatment of MSWL.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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