Wastewater treatment system for bypass sludge discharge

Abstract

The invention discloses a bypass sludge discharge wastewater treatment system which comprises an adsorption reaction tank, the adsorption reaction tank is provided with a reaction tank water inlet pipe, a sewage inlet pipe, a water passing hole and a reaction tank water outlet pipe, the reaction tank water outlet pipe is connected with a sludge discharge sedimentation tank through a water inlet pump, and the sludge discharge sedimentation tank is provided with a sludge outlet and a sludge discharge sedimentation tank water outlet pipe. A water outlet pipe of the sludge discharge sedimentation tank and a water passing hole are respectively connected with the delay aeration tank, a water outlet pipe of the delay aeration tank and a water inlet pipe of the delay aeration tank are arranged on the delay aeration tank, the water outlet pipe of the delay aeration tank is connected with a water inlet pipe of the backflow sedimentation tank, and a water outlet and a backflow pipe are arranged on the backflow sedimentation tank; and the return pipe is respectively connected with a water inlet pipe of the reaction tank and a water inlet pipe of the delayed aeration tank through a sludge return pump. The adsorption effect of discharged sludge is utilized to remove part of COD and refractory organic matters in to-be-treated wastewater, the surface load of the sedimentation tank with the same area is low, the SS of effluent of the sedimentation tank is low, the process is simple, and energy conservation and consumption reduction are realized.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment technology, in particular to a wastewater treatment system for bypassing sludge discharge. Background technique [0002] The basic principle of sewage aerobic treatment is to use microorganisms to oxidize and decompose organic matter by supplementing oxygen in the aerobic tank. Various activated sludge methods are currently the most widely used methods for sewage treatment; in recent years, A / O method, A / B, A2 / O method, oxidation ditch, SBR and other processes are widely used. The A / O method, A2 / O method, and oxidation ditch process do not take advantage of the adsorption effect of sludge. The sedimentation tank completes the functions of sludge return and sludge discharge. When the load is reduced and the sludge concentration in the sedimentation tank is low, a sludge thickening tank should be set up separately when the sludge is discharged. The A / B process utilizes the adsorption ...

AI Technical Summary

Problems solved by technology

When the activated sludge settles in the secondary settling tank, part of it returns to the aerobic tank, and part of it is discharged. The adsorption effect of the discharged activated sludge is not utilized.

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