Sewage treatment system based on deep nitrogen and phosphorus removal technology of soil purification tank

Abstract

The invention discloses a sewage treatment system based on a deep nitrogen and phosphorus removal technology of a soil purification tank. The sewage treatment system comprises a sewage tank, a separation tank, an oil separation tank, a fermentation tank, a precipitation tank, an adjusting tank, the soil purification tank and a water storage tank which are successively connected with each other via pipelines, wherein a vegetable layer, an aerobic layer, an anoxic layer, an anaerobic layer and a water collection layer are successively arranged on the soil purification tank from top to bottom; aeration pipes are arranged on the surface of the vegetable layer; a water distribution disc is arranged at the center of the aerobic layer; the water distribution disc comprises a water distribution pipe which passes through the aerobic layer, the anoxic layer and the anaerobic layer; water collection pipes are horizontally arranged in the water collection layer. The sewage treatment system is simple in process; by arranging the soil purification tank, aerobic reaction, anoxic reaction and anaerobic reaction are successively completed in the soil purification tank, so that the effect of synchronously removing nitrogen and phosphorus is achieved.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment and relates to a sewage treatment system based on a soil purification tank deep denitrification and phosphorus removal technology. Background technique [0002] At present, there are mainly three series of nitrogen and phosphorus removal treatment processes used in sewage treatment plants: ① Oxidation ditch series; ② A / O series; ③ Sequencing batch reactor (SBR) series. Among them, the A / O series through continuous development and improvement have formed the current typical processes: such as A2 / O process, improved A2 / O process, UCT process, improved UCT process, VIP process, inverted A2 / O process, etc. The above processes all have the function of denitrification and phosphorus removal, but some of them are not very effective in denitrification and phosphorus removal, some are more focused on one of denitrification and phosphorus removal, and some are increased in order to achieve better denitr...

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Problems solved by technology

[0003] In order to achieve the above purpose, the present invention provides a sewage treatment system based on the deep denitrification and phosphorus removal technology of the soil purification tank, which solves the unsatisfactory effect of the denitrification and phosphorus removal process in the sewage treatment process in the prior art, high chemical consumption and high cost The problem

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