Novel high-efficient energy-saving precipitating and filtering method utilizing light particle medium filter materials

The invention relates to a novel high-efficient energy-saving precipitating and filtering method utilizing light particle medium filter materials. By the aid of the method, two processes including a precipitating process and a filtering process for sewage purification are completed in a system, occupied area is saved, purposes of not only directly treating sewage with higher turbidity but obtaining outflow water with better quality are realized, so that problems that at present, the quality of outflow water of a precipitating system is poorer and a filtering system cannot directly treat sewage with higher turbidity are resolved, and the novel high-efficient energy-saving precipitating and filtering method has the advantages that efficiency is high and occupied land resources are saved. In addition, as the light particle medium filter materials are utilized, floccules heavier than water in the filter materials are flushed out from the filter materials from top to bottom, the filtering materials enter a mixing