Device and method for treating activated sludge wastewater

Abstract

The invention belongs to the technical field of wastewater treatment and particularly relates to a device and method for treating activated sludge wastewater. The wastewater treatment device comprises a tank body, wherein the tank body comprises an aeration zone which is located in the center of the tank body and formed by an enclosure and a sedimentation zone located at the periphery of the aeration zone, and water-flowing cross sections for communicating the aeration zone and the sedimentation zone are arranged between the bottom of the enclosure and the bottom of the tank body. By the device and method for treating activated sludge wastewater, disclosed by the invention, two basic steps (aeration and sedimentation) of the method for treating activated sludge wastewater are combined and then simultaneously completed in the tank body, so that a large amount of civil engineering structures are decreased, the requirement on the strength of a majority of structures is reduced, the cost in civil engineering structures is significantly decreased, in addition, the cost in purchase and installation of equipment is decreased, and the operation cost is also reduced; and furthermore, since the aeration and sedimentation can be simultaneously performed, the operation efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an activated sludge sewage treatment device and a treatment method thereof. Background technique [0002] Activated sludge sewage treatment method is a traditional method of sewage treatment. Since it came out one hundred years ago, it has been the main treatment method for domestic sewage, urban sewage and various industrial wastewater with good biochemical properties. It has a reliable method. , good water quality, low operating costs and other advantages. [0003] At present, traditional activated sludge wastewater treatment mainly treats wastewater through aeration and sedimentation in practical engineering applications. However, since aeration and sedimentation must be carried out separately, the existing activated sludge wastewater treatment methods are used for aeration Most of the tanks and sedimentation tanks are built separately, that is, the aeration tank and...

AI Technical Summary

Problems solved by technology

Since the two pools are built separately, the cost of the civil structure of the structure is higher, and at the same time, more devices are required, so the cost of construction is higher, and the operating cost is also higher

In addition, it has also been proposed to combine aeration and sedimentation in one pool, such as the SBR method. Although this method is in the same pool, aeration and sedimentation must be performed in sequence and cannot be completed at the same time. When a group of pools When in the aeration stage, the sedimentation stage can only be carried out in other tanks, which leads to low work efficiency

Images