关于污水处理厂CASS工艺相关设计要点的探讨

Discussion on the Key Points of CASS Process Design in SewageTreatment Plant

CASS工艺是改良型SBR工艺的一种,在工业废水处理及中小型市政污水处理厂有着较为广泛的应用。CASS工艺具有工艺流程简单、出水水质好、土建和设备投资低、耐水量水质负荷冲击、运行灵活以及很好的脱氮除磷效果等优点。本文对CASS工艺相关设计要点进行了探讨,如污泥浓度、设计水深、停留时间、选择段的设置、充水比与滗水高度以及运行周期等因素,以期为后续CASS工艺或其他改良型SBR工艺污水处理厂的建设提供参考。

CASS process is a kind of improved SBR process,which is widely used in industrial wastewater treatment and small and medium-sized municipal sewage treatment plants.CASS process has the advantages of simple process flow,good effluent quality,low investment in civil construction and equipment,resistance to water and quality load impact,flexible operation and good dephosphorization effect.In this paper,the main design points of CASS process are discussed,such as sludge concentration,design water depth,residence time,selection section setting,filling ratio and decanting height,and operation cycle,etc.,in order to provide reference for the subsequent construction of CASS process or other improved SBR process wastewater treatment plants.