High-load angleworm bio-filter for processing rural decentralized wastewater

Abstract

A high load VBF for treating rural dispersed sewage relates to a sewage treatment device. The VBF is cylindrical in shape, and is composed of an inlet pipe (1), a rotating distributor (2), a first VBF layer (3), a spacing layer (4), a second VBF layer (5), the spacing layer (4) and a sedimentation tank (6) from top to down; the VBF layers are sequentially provided with a grating floor (10), the aperture of which is 6-12meshes and which is consolidated with the inner wall of the VBF, a filter gauze (9) with the aperture of 2-4mm and light shale spherical porcelain granules (7) with the packing height of 30-100cm, the diameter of 3-7mm and the density of 1.56*10<3>kg/m<3> from down to top, 15-28 thousand pieces of Eisenia foetida (8) are distributed on the surface of each square meter filling material. The spacing layer (4) is provided with a vent (11), the upper part of the sedimentation tank is provided with an overflow outlet tube (13) and the bottom is provided with a sludge discharging tube (12). The invention is characterized by reasonable structure, large hydraulic load, little occupied land area, no blockage as well as low engineering manufacture cost and operating cost, and can be widely used for treating rural sewage.

Description

technical field [0001] The utility model relates to a high-load earthworm biofilter for treating scattered sewage in rural areas, relating to a sewage treatment device. It belongs to the technical field of sewage treatment. Background technique [0002] With the development of our country's economy and the improvement of people's living standards, the problem of water pollution in rural areas has also attracted increasing attention. In rural areas, the residential area is scattered, the amount of domestic sewage is small, and there is no drainage system matching the water supply pipeline. Therefore, rural sewage is often discharged into the nearby ponds or rivers without any treatment, giving the plain river network with dense rivers and lakes The area causes water pollution, causing serious harm to human health. [0003] Through the retrieval of prior art, it is found that the existing technology of treating sewage with earthworm biofilter, such as Chinese invention paten...

AI Technical Summary

Problems solved by technology

If the hydraulic load is too low, the floor area of ​​the earthworm biofilter will be increased, and it will be easy to block, which will limit its use and promotion.

[0006] 2. Improper selection of filter material will not only affect the adaptation and growth environment of earthworms, increase the weight of the packing layer, but also cause clogging, resulting in frequent replacement of packing, causing the sewage treatment system inside the filter to be paralyzed, seriously affecting th

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