Abstract:

Aiming at the fact that in the course of treating urban sewage by CASS process,the removing effects of COD,BOD₅,SS,NH₃-N are high,but removing effects of TN and TP are not good,the operating parameters of CASS process have been optimized and adjusted. After the adjustment,the removing rates of COD,BOD₅,SS,TN,NH₃-N and TP are 94.2%,88.6%,93.7%,69.9%,96.8%,and 78.4%,respectively. Every effluent index can meet the requirements of level B in class Ⅰ of Discharge Standard of Pollutants from Urban Sewage Treatment Plants(GB 18918-2002).

Key words: cyclic activated sludge system, sewage treatment, urban sewage

摘要：

针对污水处理厂CASS工艺处理城市污水过程中COD、BOD₅、SS、NH₃-N去除率较高，但TN、TP去除效果不佳的情况，优化调整了CASS工艺运行参数。调整后COD、BOD₅、SS、TN、NH₃-N、TP的去除率分别为94.2%、88.6%、93.7%、69.9%、96.8%、78.4%，各项出水指标均达到《城镇污水处理厂污染物排放标准》（GB 18918-2002）一级B标准。

关键词: CASS, 污水处理, 城市污水

CLC Number: 

• X703.1

• TU992