净水技术2025，Vol.44Issue(5)：131-137,215,8.DOI:10.15890/j.cnki.jsjs.2025.05.014
大型全地下式MBR系统抗污染及清洗方式探索与实践
Exploration and Practice of Anti-Pollution and Cleaning Solutions for Large Underground MBR System
任天昊 1曹婧 1李佟 1郭俊温 1刘凡1
作者信息
- 1. 北京城市排水集团有限责任公司,北京 100083
- 折叠
摘要
Abstract
[Objective]Membrane fouling is an important limiting condition for the operation of membrane bio-reactor(MBR)systems,and membrane cleaning is the main means to suppress membrane fouling and improve water production capacity.This article aims to improve the quality and operational stability of membrane tank cleaning,and reduce cleaning costs.[Methods]This paper took a large-scale fully underground MBR reclaimed wastewater treatment plant(WWTP)in Beijing as an example to analyze the main factors leading to membrane module fouling and permeability decline in redaimed WWTP.In response to common fouling conditions such as clogging of aeration pipes,membrane module compaction,inorganic fouling,and organic fouling,the original cleaning parameters and procedures were optimized and improved.Additionally,a series of novel cleaning and maintenance techniques were developed.[Results]After conducting the self-cleaning operation of the aeration system the blockage of the aeration pipe was significantly alleviated,and the daily decay rate decreased from 18.30 L/(m2·h·MPa)to 6.25 L/(m2·h·MPa),while both aeration uniformity and anti-compaction performance were notably improved.After conducting online sludge removal cleaning,the compaction situation of the membrane tank was significantly alleviated,and the average permeability rate could be restored to more than 20％.The higher the water permeability rate before cleaning,the more obvious the recovery effect was.After optimizing the chlorine washing program,based on ensuring the cleaning effect,sodium hypochlorite could be saved by more than 15％.Building a chemical circulation system could achieve significant savings in cleaning agents.The establishment of a chemical circulation system not only enabled the recycling of cleaning agents and significantly reduces cleaning costs,but also effectively mitigated the impact of residual chemicals on the biological treatment system.[Conclusion]The membrane fouling control strategies and cleaning method proposed in this study can effectively enhance the anti-fouling capacity and operational stability of the membrane tanks.These approaches provide valuable references for similar reclaimed WWTPs to reduce membrane tank cleaning and maintenance costs,as well as improve the refined management level of MBR systems.关键词
膜生物反应器/膜污染/化学清洗/精细化管理/药剂循环Key words
membrane bioreactor(MBR)/membrane fouling/chemical cleaning/refined management/chemicals cycle分类
资源环境引用本文复制引用
任天昊,曹婧,李佟,郭俊温,刘凡..大型全地下式MBR系统抗污染及清洗方式探索与实践[J].净水技术,2025,44(5):131-137,215,8.
