Integrated air lift SBR reactor

Abstract

The invention belongs to the technical field of sewage treatment and particularly relates to an integrated air lift SBR reactor for treating rural nonconcentrated domestic sewage. The device has a cylindrical shape and is internally divided into a regulation tank, a biochemical reaction tank and a sludge tank; and sewage and sludge are lifted by a self-designed air lifter. The regulation tank is used for regulating water quality and volume; an aerating air pipe and a stirrer are arranged in the biochemical reaction tank, and the stirrer is mainly used for anoxic denitrification; the air lifter for lifting the sewage and the sludge has various functions of isolating oil and floating slag, exhausting air, preventing a large amount of the sludge at bottom from being lifted and the like, so the operation management is simplified while a decanter and a sludge lifting pump are saved; and the sludge in the sludge tank is discharged once half a year. Comprehensively, the device of the invention has the advantages of large-scale production, convenient on-spot installation and operation management, high effluent quality, stable operation, convenient management and low investment and operation cost and therefore can fully meet the actual needs for the treatment of the rural nonconcentrated domestic sewage.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an integrated air-lift SBR reactor for treating scattered domestic sewage in rural areas. Background technique [0002] According to statistics, the drainage volume of counties, towns, and villages in my country currently accounts for about 50% of the total drainage volume of the country. However, 96% of the villages and towns do not have drainage channels and sewage treatment systems, and the sewage treatment rate at the township level does not exceed 1%. A large amount of domestic sewage is free. Discharge, causing serious pollution of surface and groundwater bodies in small towns and rural areas, seriously threatening the safety of drinking water in rural areas. Therefore, improving the sewage treatment rate in villages and towns has become an urgent basic work content for comprehensive and healthy construction of new countryside. However, most of the rese...

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Problems solved by technology

Although the improved process has optimized some deficiencies of the traditional SBR technology to a certain extent, there are still some deficiencies in the above process for the treatment of scattered domestic sewage in rural areas, especially single-family scattered sewage: ①These devices are basically based on decanters with complex structures. When the water outlet device is used for decentralized sewage treatment in rural areas, it is difficult to design, process and maintain, and the cost is relatively high

At the same time, the decanter is self-flowing drainage, and the outlet must be lower than the minimum drainage water level, which makes the process elevation layout difficult and limits the application of the process; ② involves a lot of electrical equipment, for example, the CASS process involves sewage lifting pumps and excess sludge Pumps, return pumps, blowers, and submersible mixers lead to large system investment and complicated operation and control; ③The degree of intensification is not high, and the waste of processing or construction materials is large; ④In the past, most devices used continuous water intake, which is not conducive to effective utilization Water carbon source, high energy consumption, low nitrogen removal efficiency

The above problems limit the application of SBR reactors in rural decentralized sewage treatment

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