Denitrification and phosphorus removal sewage treatment device with pre-anoxic coupling reaction and precipitation integrated device

Abstract

The present application relates to a denitrification and dephosphorization sewage treatment device of a front-hypoxia coupled reaction and precipitation integrated device, comprising a vertical cylindrical main processor, the main processor comprises a hypoxia zone, an anaerobic zone and an aerobic zone from bottom to top, a reaction and precipitation integrated device is arranged at the center of the aerobic zone, an overflow tank and a water outlet pipe are arranged at the top of the reaction and precipitation integrated device, and the produced water is discharged, the bottom of the reaction and precipitation integrated device is connected with the hypoxia zone through a sludge return pipe, and the separated sludge is returned to the hypoxia zone; a water distributor is arranged at the bottom of the hypoxia zone to feed water into the main processor; at least one nitrification liquid return pipe is arranged on the inner wall of the main processor, the top of the nitrification liquid return pipe is located in the aerobic zone, and the bottom of the nitrification liquid return pipe is located in the hypoxia zone; a plurality of rotatable stirring cages are arranged in the aerobic zone, the side surface of the stirring cage is loaded with aerobic microorganisms, the sewage from the anaerobic zone can be input into the stirring cage, the stirring cage rotates to promote the reaction of the sewage and the aerobic microorganisms; and the aerobic zone is provided with a load shield for loading the aerobic microorganisms.

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