Biochemical treatment and sedimentation integrated backflow type active sludge biochemical treatment device

Abstract

The invention relates to a biochemical treatment and sedimentation integrated backflow type active sludge biochemical treatment device, which comprises a cylindrical shell and a high-efficiency aerator, wherein a backflow cylinder with open upper and lower ends is arranged in the shell, an interspace for forming a sedimentation overflow area is reserved between the upper end of the backflow cylinder and the top of the shell, an interspace for forming a sludge area is reserved between the lower end of the backflow cylinder and the bottom of the shell, an interspace for forming a rotational flow passage is reserved between the outer wall of the backflow cylinder and the inner wall of the shell, a jet pipe of the high-efficiency aerator is connected into the shell along the tangential direction of the shell and is communicated with the space inside the shell, and the joint part corresponds to the lower part of the backflow cylinder. The biochemical treatment and sedimentation integrated backflow type active sludge biochemical treatment device forms backflows in the shell, effectively improves the mixed mass transferring capacity, has high active sludge concentration and good purification effect, allows deeper water depth, and is mainly applied to the aerobic biochemical treatment of organic sewage.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to a backflow activated sludge biochemical treatment device integrating biochemistry and sedimentation, belonging to the technical field of environmental protection. Background technique [0002] Activated sludge aerobic biochemical reaction has been an important technology for organic sewage treatment for a long time. Its cost, treatment effect is good, and the equipment is simple. An important factor of the effect, the current aeration equipment mostly adopts aeration heads of various structures, the aeration head is set at the bottom of the sewage treatment equipment, connected to the high-pressure air supply pipe, and the air flow is shot out through the aeration head, so as to realize the air flow. Mixed mass transfer with sewage to achieve the effect of aeration. Due to the pressure limitation of the air source, this kind of aeration equipment can only be used within 5 meters of wa...

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Problems solved by technology

[0002] Activated sludge aerobic biochemical reaction has been an important technology for organic sewage treatment for a long time. Its cost, treatment effect is good, and the equipment is simple. An important factor of the effect, the current aeration equipment mostly adopts the aeration head of various structures, the aeration head is set at the bottom of the sewage treatment equipment, and the high-pressure air supply pipe is connected to shoot out the air flow through the aeration head, so as to realize the air flow. Mixed mass transfer with sewage to achieve the effect of aeration. Due to the pressure limitation of the air source, this kind of aeration equipment can only be used within 5 meters of water depth. Too deep water will not be able to aerate, which also limits The depth of the aerobic biochemical pool increases the floor area of ​​the aerobic treatment system. In addition, the gas-liquid mass transfer effect of this method of launching air jets into the sewage is limited, which requires a lot of energy and high-pressure air

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