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

Abstract

The invention relates to a biochemical treatment and sedimentation integrated central sedimentation type active sludge biochemical treatment device, wherein the upper part in a shell is provided with an annular overflow trough with water inletting from two sides and a despin mechanism positioned below the annular overflow trough, the lower part of the shell is inverted frustum shaped, the bottom is provided with a sludge discharge port, the middle part is provided with a sedimentation cylinder with open upper and lower ends, and the upper end of the sedimentation cylinder is inverted umbrella shaped; an interspace for forming a sedimentation overflow area is reserved between the upper end of the sedimentation cylinder and the top of the shell, an interspace for forming a sludge area is reserved between the lower end of the sedimentation cylinder and the bottom of the shell, an interspace for forming a rotational flow passage is reserved between the outer wall of the sedimentation cylinder and the inner wall of the shell, and the part of the shell positioned in the sludge area is inverted frustum shaped; and a jet pipe of a high-efficiency aerator is connected into the shell along the tangential direction of the shell and is communicated with the inner space of the shell. The biochemical treatment and sedimentation integrated central sedimentation type active sludge biochemical treatment device forms ascending rotational flows 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 central sedimentation activated sludge biochemical treatment device integrating biochemistry and sedimentation, and belongs to the technical field of environmental protection. Background technique [0002] Activated sludge aerobic biochemical reaction is an important technology for organic sewage treatment for a long time. It has good cost, treatment effect and simple equipment, so it is the first choice for organic sewage treatment. Among them, aeration equipment affects the aerobic biochemical treatment of activated sludge. An important factor for the effect, most of the current aeration equipment uses aeration heads 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 the aeration head to shoot out air flow to achieve air The mixed mass transfer with sewage can achieve the effect of aerat...

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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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