The XBS rotating decanter is mainly used for decanting in drainage stage, it generally stops at the highest water level of the upper pool. The decanting weir is driven by the transmission mechanism and then descends slowly to start decanting. Water goes through the decanting weir, supporting pipes, main pipes and flows out continuously. When the weir goes down and arrives at the pre-set depth, the transmission mechanism begins to reverse, which makes the decanter quickly return to the highest water level, and then it waits for the next order.