Sewage treatment system and sewage treatment method thereof

Abstract

The invention discloses a sewage treatment system which comprises a water collection tank for collecting and primarily settling sewage, a screen filter unit communicated with the water collection tank through an input pipe, an acidification tank at the downstream of the screen filter unit, a microbial tank at the downstream of the acidification tank, a micropore aeration tank at the downstream of the microbial tank, a multi-stage sedimentation tank at the downstream of the micropore aeration tank and a sand filter tank at the downstream of the multi-stage sedimentation tank, wherein a sand layer is arranged at the bottom of the sand filter tank; a tail tank is arranged on one side edge of the sand filter tank; a hole is formed between the bottom of the tail tank and the sand filter tank; and sand is accumulated in the hole. Firstly, the sewage is primarily settled in the water collection tank so that coarse sand and part of impurities easy to settle are removed, and then large suspended impurities are removed by the screen filter unit; secondly, the sewage is introduced into the acidification tank to form a microbial environment, and hazardous substances in the sewage are removed by a biological method so that the sewage meets the emission standard; thirdly, the sewage flows into the multi-stage sedimentation tank and then stops flowing so that impurities are settled; and finally the impurities are stopped at the sand layer, and tail water can be directly used for production. The invention further discloses a corresponding sewage treatment method.

Description

technical field [0001] The invention relates to sewage treatment, in particular to a sewage treatment system. The invention also relates to a corresponding sewage treatment method. Background technique [0002] At present, with the development of the down garment industry, more and more enterprises need to use water to treat down, and there are some additives in the process. The sewage discharged afterwards contains impurities and additives and other components, and cannot be discharged directly to the outside. The sewage of the down industry contains heavy or light various impurities, some of which are floating, some are suspended, some can be deposited, and the sewage treatment cannot be completed through simple precipitation or neutralization reaction. Compared with down, which is an accessory produced by animals, it has Biological properties, which contain biological nutrients, cannot be neutralized and cannot be precipitated, and require biological treatment. Content...

AI Technical Summary

Problems solved by technology

[0002] At present, with the development of the down garment industry, more and more enterprises need to use water to treat the down. There are some additives in the process. The sewage discharged later contains impurities and additives and other components, so it cannot be directly discharged externally.

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