Sewage treatment device

Abstract

The invention relates to a sewage treatment device, and belongs to the technical field of sewage treatment. The sewage treatment device comprises an anaerobic zone, an anoxic zone I, an anoxic and aerobic multifunctional zone, an anoxic zone II, an aerobic zone, a membrane zone and a deep phosphorus removal zone which are sequentially arranged side by side, and partition plates are arranged between adjacent parts of the anaerobic zone, the anoxic zone I, the anoxic and aerobic multifunctional zone, the anoxic zone II, the aerobic zone, the membrane zone and the deep phosphorus removal zone; openings are formed in the tops of the partition plates between the anaerobic zone and the anoxic zone I, between the multifunctional anoxic-aerobic zone and the anoxic zone I and between the aerobic zone and the membrane zone; openings are formed in the bottoms of the partition plates between the anoxic zone I and the the anoxic and aerobic multifunctional zone and between the anoxic zone II and the aerobic zone. The device has the beneficial effects that compared with the prior art, multiple anoxic and aerobic multifunctional zones are arranged, multi-point water inlet and multi-section backflow are achieved, adjustment is flexible, and the device can adapt to complex water quality; the deep dephosphorization zone is arranged to ensure that the total phosphorus of the effluent reaches the standard.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage treatment device. Background technique [0002] As people pay more and more attention to environmental protection, the treatment standards of domestic sewage are also gradually improved, and the treatment standards in most areas are raised to the first-level A standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002), and some environments are under key protection Ground, the treatment standard is raised to quasi-four water standard. At present, domestic sewage treatment mostly adopts activated sludge method and biofilm method. The main process of activated sludge method is A2O, which is composed of aeration tank, sedimentation tank, sludge return and excess sludge discharge system. The sewage can be purified through biochemical reaction and physical precipitation in the system. The main process of the biofilm...

AI Technical Summary

Problems solved by technology

Using the traditional A2O treatment process and biofilm method, when the carbon-to-nitrogen ratio is less than 4 and the ammonia nitrogen in the influent is higher than 45mg / L, the effluent index cannot reach the first level of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) A standard

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