The underflow is led direct onto the belt filter by gravity, the overflow is dropped back to the filtrate tank, however a part of its flow is led to the waste water hydro cyclone feed tank.

• 水力旋流站底流靠重力直接被排放到真空皮带机。水力旋流站的溢流管被返送到过滤箱，它们其中一部分被排入废水水力旋流站供给箱。