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中文摘要：
对2级A/O系统二级曝气池污泥发黑原因进行了研究。通过对进出水水质、工艺流程以及运行记录进行分析,并结合常规污泥发黑的原因及应对措施,找出二级曝气池污泥发黑的原因。结果表明,2级A/O系统二级曝气池污泥发黑的原因是二沉池回流了腐化污泥。通过增大溶解氧含量、关闭二沉到二曝的回流阀门、清理二沉池腐化污泥以及投加营养的措施即可恢复正常。
英文摘要：
The second aeration tank＇s black sludge in two-stage A/O process was researched. Through analyzing the water quality of influent and effluent, technological process and operating records, and combined with conventional causes and solutions of black sludge, the causes of the second aeration tank＇s black sludge in two-stage A/O process were found out. The results showed that, the second aeration tank＇s black sludge in two-stage A/O process was caused by depraved sludge which returned from the second pond. The sludge could be recovered by increasing the DO, closing the valve between the second pond and the second aeration tank, cleaning the depraved sludge of the second pond and adding nutrition.
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