A multi-stage filtration system and sewage filtration method for sewage treatment

Abstract

The invention discloses a multi-stage filtration system for sewage treatment and a sewage filtration method, comprising a first filter device, a second filter device and a third filter device, the liquid inlet end of the second filter device is connected to the first filter device The liquid outlet is connected, and the liquid inlet of the third filtering device is connected with the liquid outlet of the second filtering device; the first filtering device includes at least one set of mud-water separation components, and the mud-water separation components separate the mud in the sewage and an aqueous solution, the second filter device is arranged on the flow path of the aqueous solution processed by the mud-water separation assembly, the second filter device includes a second filter assembly, and the second filter assembly filters the water treated by the mud-water separation assembly For the aqueous solution, the third filtering device is arranged on the circulation path of the aqueous solution filtered by the second filtering device, and the third filtering device filters the aqueous solution again, which can effectively and thoroughly filter the impurities in the water body.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a multi-stage filtering system and a sewage filtering method for sewage treatment. Background technique [0002] The urban sewage treatment process generally determines the degree of sewage treatment and the corresponding treatment process according to the utilization or discharge of urban sewage and the natural purification ability of the water body. Whether the treated sewage is used for industry, agriculture or recharge to replenish groundwater, it must meet the relevant water quality standards issued by the state. Modern sewage treatment technology can be divided into primary, secondary and tertiary treatment processes according to the degree of treatment. The primary treatment of sewage uses physical methods, such as sieving, sedimentation, etc. to remove sludge and suspended solids in sewage, but currently the sewage solution containing sludge is filtered throug...

AI Technical Summary

Problems solved by technology

The primary treatment of sewage uses physical methods, such as sieving, sedimentation, etc. to remove sludge and suspended solids in sewage, but currently the sewage solution containing sludge is filtered through a filter, and the filtration of the water body is not enough during filtration Thoroughly, there is still a certain amount of sludge or suspended solids in the water body, the sewage treatment is not completely up to standard, and it is difficult to recycle

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