Sewage treatment system for developing and applying carbon source by using authigenic sludge

Abstract

The invention relates to a sewage treatment system for developing and applying a carbon source by using authigenic sludge. The sewage treatment system comprises a pretreatment tank, wherein a water outlet of the pretreatment tank is sequentially connected with a biological reaction tank and a secondary sedimentation tank; a supernatant output port of the secondary sedimentation tank is connected with a water outlet pipe; and a sludge output port of the secondary sedimentation tank is connected to a water inlet of the biological reaction tank through a sludge return pipe. The sewage treatment system is characterized in that: an ozone sludge wall breaking device is also connected between the sludge output port of the secondary sedimentation tank and the water inlet of the biological reaction tank through a wall-breaking sludge return pipe; the device consists of an ozone generator, a gas-water mixer, a gas flowmeter, a liquid flowmeter and a sludge pump, and the ozone generator is connected with an air inlet of the gas-water mixer through the gas flowmeter; an output port of the sludge pump which is connected with the secondary sedimentation tank is connected with a liquid inlet of the gas-water mixer through the liquid flowmeter; and a liquid outlet of the gas-water mixer is connected with the water inlet of the biological reaction tank. The sewage treatment system has the advantages that: the problem of the shortage of the carbon source in sewage treatment is solved, resources are saved, and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment system which is mainly applied to the urban sewage treatment using the activated sludge method as the sewage treatment process and utilizes the self-generated sludge for carbon source development and application. Background technique [0002] The activated sludge method has been widely used in the treatment of urban sewage, which plays a certain role in reducing the discharge of nitrogen and phosphorus in sewage and protecting the water environment. The traditional activated sludge treatment system mainly includes a pretreatment tank, a biological reaction tank, and a secondary sedimentation tank connected in sequence. The sewage first passes through the pretreatment tank to remove impurities such as inorganic matter and mud in the sewage, and then enters the biological reaction tank to remove organic matter and nitrogen. , phosphorus, and finally ente...

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Problems solved by technology

[0004] The main purpose of the present invention is to address the above problems, to provide a sewage treatment system that utilizes self-generating sludge for carbon source development and application, and obtains carbon source by breaking the

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