Integrated recycling-type biological sewage treatment device and correlation method thereof

Abstract

Integrated circulating biochemical sewage treatment equipment, including the inlet channel, mud and water mixing area, anoxic area, aerobic area, sedimentation water inlet area and sedimentation area connected in sequence from upstream to downstream, wherein the anoxic area is separated by air lift The circulation pipe is connected to the aerobic zone; it also includes a sludge return device, which includes a sludge return main channel connected to the upstream of the mud and water mixing zone and the first airlift sludge return pipe, and the sedimentation zone passes through the first The air-lifting sludge return pipe is connected to the sludge return main channel, or the sedimentation area is connected to the sludge return main channel through the first air-lifting sludge return pipe and the sludge return branch pipe or branch channel in turn; the sedimentation area is also connected to the effluent discharge device . This sewage treatment device is especially suitable for villages and towns, concentrated residential areas, and living areas of tourist spots in scenic spots, etc.; it has relatively small investment, strong pertinence, mature technology, simple structure, stable performance, long service life, small footprint, and low operating costs. Low cost, safe and reliable operation, convenient maintenance and management.

Description

technical field [0001] The invention relates to the technical field of sewage treatment. Background technique [0002] According to the actual operation of small sewage treatment facilities or devices in towns and concentrated residential areas at home and abroad, conventional sewage treatment processes are generally used such as: contact oxidation (including AO or A2 / O type), small oxidation ditch and CASS (SBR series), etc., the processing process is long, and the operation management requires corresponding professional and technical personnel, especially for remote villages and towns, there will be no corresponding technical management personnel to provide technical support. When the sewage treatment process needs to increase the standard, the effluent of the conventional treatment process requires ammonia nitrogen ≤ 5 (8) mg / L; total nitrogen ≤ 15 mg / L, and the energy consumption of the reflux of the nitrification liquid in the conventional process is high, requiring low...

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Problems solved by technology

[0002] According to the actual operation of small sewage treatment facilities or devices in towns and concentrated residential areas at home and abroad, conventional sewage treatment processes are generally used such as: contact oxidation (including AO or A2 / O type), small oxidation ditch and CASS (SBR series), etc., the processing process is long, and the operation management requires corresponding professional and technical personnel, especially for remote villages and towns, there will be no corresponding technical management personnel to provide technical support

When the sewage treatment process needs to increase the standard, the effluent of the conventional treatment process requires ammonia nitrogen ≤ 5 (8) mg / L; total nitrogen ≤ 15 mg / L, and the energy consumption of the reflux of the nitrification liquid in the conventional process is high, requiring lower concentrations of ammonia nitrogen and total nitrogen. It will greatly increase the operating cost of sewage treatment

[0003] Conventional treatment equipment such as: MBR membrane equipment, integrated buried equipment, biological turntable or biological runner, etc., have high operating costs, high daily maintenance costs, certain hidden safety hazards in operation management, and the effluent cannot meet the standards stably. At the same time, there are problems such as the return of nitrification liquid or sludge, which all use pumps to return, and the sewage treatment system is more complicated.

If the conventional oxidation pond treatment technology, artificial rapid infiltration technology, anaerobic + constructed wetland sewage treatment process or unpowered domestic sewage purification device and other processes are adopted, although the operating cost is low, there will be impacts on the surrounding environment during the operation process (mainly Odor, mosquitoes and flies), unstable operation, clogged filter layer, seasonal instability in wetlands, effluent water quality cannot meet the standard stably, and has the disadvantage of large footprint

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