Land-saving type efficient nitrogen and phosphorus removal sewage treatment device and method

Abstract

The invention discloses a land-saving type efficient nitrogen and phosphorus removal sewage treatment device and method. The land-saving type efficient nitrogen and phosphorus removal sewage treatmentdevice comprises a pretreatment unit; the left end of the pretreatment unit is provided with a water inlet; the right end of the pretreatment unit is communicated with the left end of an anaerobic pool; the right end of the anaerobic pool is communicated with the left end of a first-stage aerobic pool; the right end of the first-stage aerobic pool is communicated with the left end of a secondarysedimentation pool; the right end of the secondary sedimentation pool is communicated with the left end of an anoxic pool; the right end of the anoxic pool is communicated with the left end of a secondary-stage aerobic pool; the right end of the secondary-stage aerobic pool is communicated with the left end of a deep treatment unit; the right end of the deep treatment unit is provided with a wateroutlet; and the anoxic pool and the secondary-stage aerobic pool are both filled with a biological membrane filler. The traditional A / A / O technology is improved into combination of front section A / Oadopting an activated sludge method and post A / O adopting a pure biological membrane method; and compared with the activated sludge method and a sludge-membrane mixing technology in the past, the combination greatly saves the occupying area while strengthening the pollutant effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a land-saving sewage treatment device and method for high-efficiency nitrogen and phosphorus removal. Background technique [0002] Controlling and treating eutrophication of water bodies is a very difficult and expensive worldwide problem, known as ecological cancer. Human beings have reached a consensus on the root cause of water eutrophication, that is, excessive discharge of nutrients such as nitrogen and phosphorus is the most critical factor. Therefore, only by cutting off the source of pollution can we eradicate eutrophication and achieve sustainable economic and social development. A2 / O refers to the anaerobic-anoxic-aerobic process. In essence, this process should be anaerobic-anoxic-aerobic method, the abbreviation of biological denitrification and phosphorus removal process, as the simplest simultaneous denitrification and phosphorus removal process, it is...

AI Technical Summary

Problems solved by technology

This treatment process effectively improves the effect of nitrogen and phosphorus removal, and at the same time reduces the volume of the biochemical reaction pool compared with the traditional A2 / O process; The reflux ratio enters the anoxic section of A2 / O, which greatly increases the surface load of the secondary settling tank and doubles the area occupied

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