生物池卸空对MBR工艺运行的影响及应对措施

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英文篇名：Influence of Biological Tank Emptying on the Operation of MBR Process and Its Countermeasures 作者：张静 英文作者：ZHANG Jing;Beijing Drainage Group Co.Ltd.; 关键词：MBR工艺 ; 生物池卸空 ; 曝气 ; 透水率 ; 化学清洗 ; 膜污染 英文关键词：MBR process;;biological tank emptying;;aeration;;water permeability;;chemical cleaning;;membrane fouling 中文刊名：中国给水排水 英文刊名：China Water & Wastewater 机构：北京城市排水集团有限责任公司; 出版日期：2019-04-01 出版单位：中国给水排水 年：2019 期：07 语种：中文; 页：41-47 页数：7 CN：12-1073/TU ISSN：1000-4602 分类号：X703

摘要

生物池经过一段时间运行后需要卸空维修水下设备,这对MBR工艺的运行造成一定的冲击。结合北京某再生水厂的运行实践,提出了应对生物池卸空的水质调控和膜池运行措施。对于分体式MBR工艺,为防止卸空造成邻池的膜厌氧板结,应改进生物池到膜池的配水渠道设计。同时,通过提前预排泥和调整工艺参数,确保卸空期间的出水水质达标。针对生物池卸空可能导致的膜池污泥浓度过高,可将卸空的生物池混合液排入厂区污水系统泵前池。此外,在卸空生物池时速度不宜过快,并通过增加膜的擦洗气量来减轻膜污染,必要时可采取在线和离线化学清洗,以恢复膜通量。
        After a period of operation,the biological tank needs to be emptied for the maintenance of underwater equipment,which will have a certain impact on the operation of the MBR process. Based on the practice of a reclaimed water plant in Beijing,the water quality control and MBR tank operation measures were proposed to cope with the impact of biological tank emptying. For the separate-type MBR process,in order to prevent the hardening of membrane caused by the emptying in the adjacent tank,the design of the distribution pipeline between the biological tank and membrane tank should be improved. At the same time,measures such as pre-draining and adjusting process parameters should be taken to ensure the effluent quality during the emptying period. Regarding the problem of the possible higher sludge concentration in membrane tank caused by emptying biological tank,the mixed liquid in the biological tank might be discharged into the sump of inlet pumping station. In addition,the speed should not be too fast when emptying the biological tank,and the air flow for cleaning membrane was increased to reduce membrane fouling; if necessary,on-line and off-line chemical cleaning could be adopted to recover the membrane flux.

引文

[1]张静.北小河污水处理厂反渗透系统的调试运行和保存[J].中国给水排水,2010,26(2):93-98.Zhang Jing.Commissioning operation and conservation of reverse osmosis system in Beixiaohe WWTP[J].China Water&Wastewater,2010,26(2):93-98(in Chinese).
    [2]张静,崔希龙.中水处理系统工艺改造及运行参数优化[J].给水排水,2007,33(4):47-50.Zhang Jing,Cui Xilong.Process renovation and operation parameter optimization of reclaimed water treatment system[J].Water&Wastewater Engineering,2007,33(4):47-50(in Chinese).
    [3]王洪臣.城市污水处理厂运行控制与维护管理[M].北京:科学出版社,1997.Wang Hongchen.Operation,Control and Maintenance of Municipal Wastewater Treatment Plant[M].Beijing:Science Press,1997(in Chinese).
    [4]张静.倒置A2O工艺硝化除磷调控的实例分析[J].中国给水排水,2007,23(20):94-96.Zhang Jing.Case analysis on control of A2/O process for nitrification and phosphorus removal[J].China Water&Wastewater,2007,23(20):94-96(in Chinese).
    [5]张树国,顾国维,吴志超.膜生物反应器中污泥特性对膜污染的影响研究[J].工业水处理,2003,23(12):8-12.Zhang Shuguo,Gu Guowei,Wu Zhichao.Advances in membrane fouling control affected by the sludge properties in membrane bioreactor[J].Industrial Water Treatment,2003,23(12):8-12(in Chinese).
    [6]杨小丽,王世和.污泥浓度与曝气强度对MBR运行的综合影响[J].中国给水排水,2007,23(1):77-80.Yang Xiaoli,Wang Shihe.Integrated effect of MLSS and aeration intensity on membrane bioreactor operation[J].China Water&Wastewater,2007,23(1):77-80(in Chinese).