Jet flow pre-aeration multi-stage plug-flow type activated sludge sewage processing system

Abstract

The invention relates to a jet flow pre-aeration multi-stage plug-flow type activated sludge sewage processing system, which comprises a plug-flow type activated sludge pond, a plurality of jet flow aerators and a plurality of jet flow mixers corresponding to the jet flow aerators, wherein the plug-flow type activated sludge pond is provided with a baffle plates divided into a plurality sewage channels; jet flow inlets of the jet flow mixers are connected with jet flow pipes of the corresponding jet flow aerators respectively, mixing medium inlets are connected with a sludge return pipe, and mixture outlets are connected with water inlet ends of partial or all sewage channels of the plug-flow type activated sludge pond respectively; the front parts of the jet flow aerators are connected with a primary sedimentation pond; the back parts of the plug-flow type activated sludge pond is connected with a secondary sedimentation pond, a filtering pond and a water reservoir in sequence; and the system sludge return pipe is connected with a sludge discharge port of the secondary sedimentation pond. The system has the advantages of having good purification effect and low power consumption, facilitating energy conservation and reducing operating cost.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to a jet flow pre-aeration multi-stage push-flow activated sludge sewage treatment system, which is mainly used for the purification treatment of domestic sewage and belongs to the field of environmental protection. Background technique [0002] Since 1804, the British first used sedimentation and filtration technology as a centralized water treatment plant. In 1884, the Americans invented the coagulation, sedimentation, filtration, and chlorine disinfection technology, which has been used for 120 years. There are new discoveries and improvements in treatment. With the improvement of living standards and the increase of population density, the treatment of sewage has also been developed. The purpose is to basically eliminate pollutants in the water before being discharged into natural water bodies, so that In order to achieve a certain degree of purification and avoid adverse effects on ...

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Problems solved by technology

[0002] Since 1804, the British first used sedimentation and filtration technology as a centralized water treatment plant. In 1884, the Americans invented the coagulation, sedimentation, filtration, and chlorine disinfection technology, which has been used for 120 years. There are new discoveries and improvements in treatment. With the improvement of living standards and the increase of population density, the treatment of sewage has also been developed. The purpose is to basically eliminate pollutants in the water before being discharged into natural water bodies, so that In order to achieve a certain degree of purification and avoid adverse effects on water bodies and other environmental factors, these treatment methods basically use relatively low-cost biochemical reaction treatments, and establish other microbial groups through anaerobic and aerobic microorganisms. It is suitable for the growth and reproduction conditions of the required microbial groups, and the organic matter and other pollutants are degraded by microorganisms to form harmless or basically harmless inorganic matter. These biochemical technologies have achieved the purpose of sewage treatment in their own suitable occasions. For example, the activated sludge method based on aerobic biochemistry can be used to treat large-scale sewage, achieve a high degree of purification, and reach water that meets the discharge standards. The aeration device is an aeration head installed at the bottom of the water. Aeration is realized by connecting high-pressure air. The disadvantage of this technology is that the aeration effect is not ideal, and the second is that the aeration pressure is small, which limits the water depth of the reaction device, thereby limiting the processing capacity per unit area and limiting The process of mixing and settling limits the concentration of activated sludge

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