大型污水处理厂污泥膨胀原因分析及其控制方法  

Cause Analysis and Control of Sludge Bulking in Large-scale WWTP

作　　者：白雪[1] 张荣兵[1] 顾剑[1] 文洋[1] 王博[1] 齐嵘[2] 王娟[2] 

机构地区：[1]北京城市排水集团有限责任公司京北分公司,北京100192 [2]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085

出　　处：《中国给水排水》2011年第23期31-35,共5页China Water & Wastewater

基　　金：北京市科技计划项目(D101109047410001)

摘　　要：北京市某大型污水处理厂在2009年和2010年的1月—5月均出现了SVI值升高并伴随大量生物泡沫的现象,通过对微生物种群的分析,确定均是由于Microthrix parvicella(微丝菌,以下简称M.P菌)的过量繁殖导致污泥膨胀所致。在实际运行过程中,通过控制有机负荷及其他工艺调控方式可使处于膨胀期的功能性微生物种群(如硝化细菌)稳定在一定数量水平,保证污水生物处理过程的稳定。在沉淀池的进水端增加透水挡墙以及良好的现场管理措施是确保污泥膨胀期间出水水质稳定达标的有效措施。当水温达到17～18℃以上时,M.P菌引发的污泥膨胀和生物泡沫现象会逐渐消失。The SVI was increased and a lot of biological foam occurred in January to May 2009 and 2010 at a large-scale wastewater treatment plant in Beijing. Through the analysis of microbial communities, it was determined that the cause was the sludge bulking caused by the excessive propagation of Microthrix parvicella. In the actual operation, the controlling of organic load and other processes can stabilize the number of functional microbial communities such as nitrobacteria during the sludge bulking, thus ensuring a stable biological treatment. Adding a permeable wall at the inlet of sedimentation tank as well as good field management measures are effective measures for ensuring the effluent quality to meet the discharge standard during sludge bulking. The phenomena of sludge bulking and foaming disappear when water temperature reaches more than 17 to 18℃.

关 键 词：污泥膨胀 生物泡沫 微丝菌 SVI 有机负荷 溶解氧 透水挡墙 

分 类 号：X703[环境科学与工程—环境工程]