In the aerobic part CASS (Cyclic Activated Sludge System) is adopted CASS is a kind of low investment and operational cost technologies with flexible operational ways and good nitrogen and phosphorus removal effect.

• 好氧处理采用循环活性污泥系统(CASS),循环活性污泥系统CASS工艺投资小、运行费用低、运行方式灵活、处理效率高、具有良好的脱氮除磷效果。