A^(2)O工艺处理低温污水污泥膨胀及恢复机理研究  

Study on Sludge Bulking and Recovery Mechanism for Low Temperature Sewage Treatment by A^(2)O Process

作　　者：康华[1,2] 王帆 刘文爱[1,2] 李亚静 闫艺明 边德军 KANG Hua;WANG Fan;LIU Wenai;LI Yajing;YAN Yiming;BIAN Dejun(School of Water Conservancy and Environmental Engineering,Changchun Institute of Technology,Changchun 130012,China;Key Laboratory of Urban Sewage Treatment of Jilin Province,Changchun 130012,China;Zhuhai Water Supply and Drainage Pipe Network Co.,Ltd.,Zhuhai 519000,China)

机构地区：[1]长春工程学院水利与环境工程学院,吉林长春130012 [2]吉林省城市污水处理重点实验室,吉林长春130012 [3]珠海市供排水管网有限公司,广东珠海519000

出　　处：《环境科学与技术》2022年第6期117-123,共7页Environmental Science & Technology

基　　金：国家自然科学基金项目(51878067);吉林省科技发展计划项目(20210101079JC)。

摘　　要：该文以模拟生活污水作为处理对象,采用A^(2) O工艺进行低温污泥膨胀及恢复机理研究,为解决冬季污水处理厂污泥膨胀问题提供参考。试验结果表明:低温下污泥SVI值升高,丝状菌占优势,容易出现污泥膨胀现象,低温和低有机物负荷是影响污泥膨胀的重要因素。在间歇运行条件下增大曝气量、降低污泥龄或投加活性炭,均未消除低温下的污泥膨胀,而进水有机负荷的增加有助于提高污泥沉降性能,污泥膨胀得到有效控制。通过对4种工况下污泥粒径分布进行对比分析,发现污泥粒径与SVI值变化在一定的情况下存在相关性。The mechanism of low temperature sludge bulking and recovery were studied with the treatment of simulated domestic sewage by A^(2) O process,for the purpose to provide reference for the solution of sludge bulking in sewage treatment plant in winter.The results showed that the SVI value of sludge increased at low temperature,filamentous bacteria were dominant,and sludge bulking was easy to occur.Low temperature and low organic load were important factors affecting sludge bulking.Under the intermittent operation conditions,sludge bulking at low temperature can not be eliminated by increasing aeration rate,reducing sludge age or adding activated carbon,while the increase of influent organic load can help to improve sludge settling performance,and sludge bulking can be effectively controlled.Through the comparative analysis of sludge particle size distribution under four conditions,it is found that there is a correlation between sludge particle size and SVI value under certain conditions.

关 键 词：A^(2)O工艺 低温 污泥膨胀 污泥指数 

分 类 号：X703.1[环境科学与工程—环境工程]