Multilevel biological contact oxidation reactor sewage treatment device

Abstract

The invention relates to a sewage treatment device, and particularly to a multilevel biological contact oxidation reactor sewage treatment device. The device comprises at least two biological contact oxidation tanks and one sedimentation clarification tank which are in series connection via connecting pipelines. Each biological contact oxidation tank is formed by a cylindrical outer tank body and a frusto-conical inner tank body. The inner and outer tank bodies communicate with each other via an annular diversion gap. A floating imitation aquatic plant biological filler system and an aeration system composed of an aeration machine, main air pipes and an aeration pipe are arranged inside each inner tank body. The sedimentation clarification tank comprises a sedimentation clarification tank body, the lower part of which is a mud collection part in an inverted frusto-conical shape; a vertical flow pipe is arranged at the axial center of the sedimentation clarification tank body; and a submersible sewage pump for mud removal is placed in the mud collection part and connected to a mud outlet pipe. The aeration machine and the submersible sewage pump are connected to an automatic control system. The device provided by the invention is high in processing efficiency, low in energy consumption, convenient for manufacturing and installation, and easy for use and maintenance.

Description

technical field [0001] The invention relates to a sewage treatment equipment, in particular to a multi-stage biological contact oxidation reactor sewage treatment equipment. Background technique [0002] With the rapid development of my country's economy and the continuous increase of urban population, centralized sewage treatment plants have been unable to keep up with the needs of development, and many places have not laid sewage pipe networks or cannot lay sewage pipe networks (such as mountainous areas, etc.), resulting in a large number of living The sewage is discharged into the water body without complete treatment, resulting in eutrophication of the water body. Therefore, the distributed sewage treatment equipment plays an important role in the treatment of the above sewage, and the small and medium-sized buried sewage treatment equipment is one of the many distributed sewage treatment equipment. One of the most widely used devices. [0003] At present, most of the sm...

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Problems solved by technology

[0004] The traditional buried sewage treatment equipment based on the biological contact oxidation process has several defects: (1) The biological contact oxidation tank is a single tank type, and the flow state is completely mixed, and all microorganisms are in the same reaction tank. Due to its different metabolic types and different requirements for nutrition, it will form a survival competition among microorganisms and reduce the purification effect of microorganisms on sewage

(2) The filler suspended in the biological reaction tank is fixed on the upper and lower filler brackets. Below the filler is the aeration head or aeration tube. After the aeration head or aeration tube is damaged, people cannot enter due to the blocking of the fixed filler. The bottom of the pool is repaired or replaced, and the treatment efficiency of the sewage equipment is gradually reduced until the equipment is scrapped

(3) In order to ensure that the sludge concentration in the biological reaction tank will not decrease, the sludge in the sedimentation tank is usually partially refluxed through a reflux pump, which increases power consumption

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