氧化沟工艺中污泥膨胀原因的分析与控制  

Cause and Control of Sludge Bulking in Oxidation Ditch Process

作　　者：王淑莹[1] 梁秀荣[1] 文洋[2] 陈滢[1] 甘一萍[2] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100022 [2]北京城市排水集团有限责任公司,北京100061

出　　处：《北京工业大学学报》2006年第4期347-351,共5页Journal of Beijing University of Technology

基　　金：北京市自然科学基金(8062006)国家'八六三'计划资助项目(2004AA601020).

摘　　要：为了有效控制某低负荷长污泥龄氧化沟工艺的污泥膨胀工况,通过对某污水处理厂设计工艺和运行参数的分析,表明该污水处理厂发生污泥膨胀的主要原因是氧化沟曝气转刷损坏导致氧化沟内总体溶解氧(DO) 质量浓度过低．针对污泥膨胀原因及相关的膨胀机理,采用降低污泥质量浓度,提高系统DO质量浓度的措施加以控制,从而解决了污泥膨胀问题．另外根据污水处理厂现有设备情况和小试试验结果,确定了该污水处理厂的最佳运行条件为:DO质量浓度约为1．0-1．5 mg／L;污泥指数在120-150 mL／g;污泥质量浓度为5．0 g／L.In order to effectively control the sludge bulking in oxidation ditch with low load and long sludge retention time, the author analyzed the process design parameters and performance data, and found out that the reason for sludge bulking in wastewater treatment plant was due to low dissolved oxygen（DO） concentration caused by aerator failure. Sludge bulking could be controlled effectively by reducing the MLSS in the oxidation ditch according to the experience of the full scale and laboratory scale continuous flow experiments. The optimum operation parameters were provided, the SVI should be controlled at 120- 150 mL/g, the concentration of MLSS and DO at 5.0 g/L and 1.0- 1.5 mg/L, respectively.

关 键 词：氧化沟 污泥膨胀 丝状菌 溶懈氧(DO) 

分 类 号：X703[环境科学与工程—环境工程]