REVERSIBLE WASHING, FLOATING BED TYPE REVERSE SEWAGE TREATMENT SYSTEM AND TREATMENT METHOD THEREOF

A reversible washing, floating bed type reverse sewage treatment system and its treatment methods are provided. Through the light filter sand and reverse sewage treatment system and the sewage filter procedure, the light filter sands float upward and gather at the top of the sewage filter tank to filter the sewage flowing upward. Further, the solid impurities in the sewage are naturally separated from the light filter sands and settle down on the bottom of the sewage filter tank, thereby achieving the effect of maintaining the filtration efficiency and reducing the maintenance of the filter material. Moreover, through the reverse washing jet nozzle and the filter sand cleaning tank and the filter sand reverse cleaning procedure, the water from the reverse washing jet nozzle can clean the light filter sands in the filter sand cleaning tank, thereby achieving the purposes of energy saving and reducing maintenance costs.