Urban sewage treatment technology for standard surface quasi IV-class water

Abstract

The invention relates to an urban sewage treatment technology for standard surface quasi IV-class water. A system is included and comprises a water inlet pump room, a grit basin, a primary sedimentation tank, an improved MBBR biochemical pool, a secondary sedimentation tank, an efficient sedimentation tank, a filter tank and a disinfecting tank; the water inlet pump room is provided with a coarsescreen, the grit basin is provided with a fine screen, the biochemical pool comprises an anaerobic pool, an anoxia pool and an aerobic pool, the primary sedimentation tank is arranged above the anoxiapool, the drainage end of the aerobic pool is connected to the secondary sedimentation tank, and the aerobic pool is provided with a nitration solution flow back pipe communicated with the anoxia pool; the efficient sedimentation tank comprises a concrete region, a magnetic powder mixing region, a flocculation region and a sedimentation region; the filter tank is provided with a fiber filter material for filtering purified sewage and a back flushing device for cleaning the fiber filter material; the disinfecting tank is provided with a disinfecting device. The system combines the secondary biochemical technology and the depth treatment technology, the units are elaborately and reasonably designed and combined, and the water outlet water quality in a sewage treatment plant and outflow water in the aspect of black and odorous river way sewage interception and source control can reach the surface quasi IV-class water standard.

Description

technical field [0001] The invention relates to the field of sewage treatment. Background technique [0002] Urban sewage mainly refers to domestic sewage of urban residents, drainage of various public facilities, industrial wastewater and initial rainwater that are allowed to be discharged into urban sewage collection systems, etc. Urban sewage contains a large amount of suspended solids, organic pollutants, germs, viruses, etc., so it must be subjected to strict biochemical and disinfection treatments. At present, the main processes of urban sewage treatment plants in my country are A / O, A 2 / O, SBR and oxidation ditch, but with the increasingly stringent discharge standards, the current process and equipment of sewage plants have been difficult to meet the new environmental protection requirements. Therefore, it is necessary to fully tap the application potential of existing treatment processes and facilities in urban sewage plants, and develop a new technical solution ...

AI Technical Summary

Problems solved by technology

At present, the main processes of urban sewage treatment plants in my country are A / O, A 2 / O, SBR and oxidation ditch, but with the increasingly stringent discharge standards, the current process and equipment of sewage plants have been difficult to meet the new environmental protection requirements

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