Sewage treatment process and device thereof

Abstract

The invention discloses a sewage treatment process and a device thereof, and in particular relates to a sewage treatment process and a device for water treatment by a floating bio-bed. The device for the sewage treatment process adopts a floating bed type filter; and the inside of the filter is provided with a floating bed filter layer and a sandrock filter layer which consist of a suspending medium from bottom to top, and a water inlet pipe passes through the filter layers from top to bottom until the underside of the floating bed filter layer. After aeration, sewage is introduced from the lower part of the floating bed filter layer through the water inlet pipe; microorganisms in the water are attached to the surface of the suspending medium to form a floating biofiltration bed; the sewage is filtered by the floating biofiltration bed and the sandrock filter layer from bottom to top in turn; clear water is overflowed and discharged from the upper part of the filter; and sludge is discharged through a discharge outlet on the lower part of the filter. The filter bed has small resistance and low energy consumption, does not need frequent back washing, and has good water treatment effect and low running cost.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a sewage treatment process using a floating biological bed for water treatment. The invention also relates to equipment used in the sewage treatment process, which belongs to the technical field of sewage treatment. Background technique [0002] Domestic sewage and various industrial wastewater are the main factors causing water pollution at present. The sewage contains a large amount of organic pollutants and nitrogen elements. The water environment has been destroyed. A large amount of sewage discharge not only causes water pollution, but also wastes water resources. Therefore, it is very necessary to use appropriate water treatment processes to treat sewage and reuse the treated sewage for life or production. [0003] At present, there are many sewage treatment methods, and various filters are used. Among them, the floating biological bed technology is an organic combination of ...

AI Technical Summary

Problems solved by technology

In the process of water treatment, the thickness of the biological bed becomes thicker, resulting in unstable pressure in the filter, large water outlet resistance, high energy consumption, and easy clogging of the filter during operation, requiring frequent backwashing, which not only consumes a lot of water, but also backwashes The water quality of the effluent is unstable, which affects the effect of water treatment, and the service life of the filler is short, and the cost of water treatment is high

In the water treatment process using the floating biological bed technology, in order to increase the dissolved oxygen in the water, it is usually necessary to aerate the sewage. The common method is to use a blower for aeration, which consumes a lot of energy. , is not conducive to energy saving, and affects the growth of biofilm on the filler

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