影响二沉池污泥上浮的因素及预防

为了防止城市污水处理中二沉池污泥上浮,针对污泥上浮原因进行了分析,提出了增加进水溶解氧浓度、缩短污泥停留时间、保持进水水量的相对稳定和合适的回流比等措施,以保证二沉池内活性污泥的稳定性,避免二沉池污泥上浮和活性污泥的大量流失,提高污水处理系统运行的稳定性,确保出水水质达到国家标准.

Factors and Prevention of Sludge Floatation in Secondary Sedimentation Tank

In order to prevent sludge floatation of secondary sedimentation tank in municipal wastewater treatment,this paper analyzes the causes of sludge floatation and puts forward measures such as increasing dissolved oxygen concentration of the influent,shortening residence time of sludge,maintaining relative stability of influent quantity and appropriate reflux ratio to guarantee the stability of activated sludge in secondary sedimentation tank,prevent sludge floatation of sedimentation tank and huge drain of activated sludge,and improve operating stability of sewage treatment system and make sure the effluent quality reaches national standard.