Advanced treatment of MBR effluent from lanfill leachate with peroxymonosulfate system

被引：0
|
作者：
Chen K. [1 ]
Sheng T. [1 ]
Su L. [2 ]
Tan C. [1 ]
机构：
[1] School of Civil Engineering, Southeast University, Nanjing
[2] Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2023年 / 53卷 / 06期
关键词：
biotoxicity; efficiency; landfill leachate; mechanism; minimum cost; peroxymonosulfate (PMS);
D O I：
10.3969/j.issn.1001-0505.2023.06.016
中图分类号：
学科分类号：
摘要：
The efficacy and mechanism of the peroxymonosulfate (PMS) system for the treatment of pollutants (chemical oxygen demand (COD), NH4+-N, etc.) in the membrane bioreactor (MBR) effluent from the leachate were investigated, and the biotoxicity and economics of the system were analyzed. The results show that the PMS system can oxidize the main pollutants in the MBR effluent from the leachate. The removal efficiencies of COD increase with the increase of PMS dosage and reach a maximum of 78. 3% at a dosage of 20. 36 g/L; 97. 2% of NH4+-N was degraded and 97. 6% of the color was removed at an oxidant dosage of 5.09 g/L. The PMS system preferentially removed the small molecules in the MBR effluent, and the humic and fulvic acids were also almost completely removed (> 99 %). In this system, the main contributors to the degradation of NH4+-N and color are HCIO and CIO", while the main contributor to the removal of organic matter is the unactivated PMS. If the goal is to remove 90% of COD, the optimal dosage of PMS is 1.018 g/L, and the corresponding minimum cost is 3 835 yuan/t. The biological toxicity of the MBR effluent after treatment with the PMS system is greatly increased, and the environmental impact of the effluent should be minimized. © 2023 Southeast University. All rights reserved.
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页码：1091 / 1099
页数：8
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