A sewage treatment device capable of realizing AAO and AOA self-switching

Abstract

The utility model relates to a kind of sewage treatment devices that can realize AAO and AOA self-switching, including biochemical reaction pool, aeration assembly, stirring assembly, sludge pusher and sludge reflux pump;Biochemical reaction pool is cylindrical, including at least four compartments arranged along the circumferential direction, adjacent compartment is separated by partition, and at least four compartments are sequentially anaerobic zone, first switching area, second switching area and facultative zone according to water flow direction;Aeration assembly is arranged in first switching area and second switching area, and stirring assembly is arranged in anaerobic zone, first switching area, second switching area and facultative zone;Sludge pusher is arranged on the partition between facultative zone and anaerobic zone;The water inlet end of sludge reflux pump is communicated with facultative zone, and the water outlet end of sludge reflux pump is communicated with second switching area.Its beneficial effect is that the sewage treatment device simplifies the switching structure of aerobic zone and anoxic zone, improves switching speed, and can better adapt to water quality fluctuation, reduce carbon source waste.

Images