Biological aerated filter with small occupied area

Abstract

The invention discloses a biological aerated filter with a small occupied area. The biological aerated filter comprises a filter tank; a water inlet pipe, a water outlet pipe and a water purifying device, which are communicated with the filter tank, wherein the water purifying device comprises a plate body, which is in sealing fit with the inner wall of the filter tank and divides the filter tankinto a sewage area and a purified water area, and the water inlet pipe is communicated with the sewage area, and the water outlet pipe is communicated with the purified water area; a filter material layer, which is arranged in the sewage area; an aeration filter head which is in sealing fit with the plate body; an air cushion layer which is arranged in the water purification area and is communicated with the aeration filter head; a water purification filter head, which is in sealing fit with the plate body, so that water in the sewage area can enter the water purification area through the water purification filter head. By means of the water purification device, the equipment cost and the occupied area are reduced; meanwhile, sewage treatment is more efficient, a better aeration effect isachieved, the sewage purification effect is better; in addition, the equipment is simple in overall structure, easier to produce and manufacture and lower in cost.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment, and particularly relates to a biological aerated filter with a small floor area. Background technique [0002] In recent years, with the rapid development of society and economy, the amount of pollutants discharged into water bodies has increased year by year, causing natural water bodies such as rivers, lakes and reservoirs to be polluted to varying degrees. The pollution prevention and control of natural water bodies has also become a major problem that needs to be solved; aeration; The biological filter is one of the important structures for the restoration of contaminated natural water bodies. It can effectively remove organic matter and ammonia nitrogen and other pollutants in natural water bodies, reduce the total amount of pollutants, and purify natural water bodies. [0003] However, the sewage in the existing biological aerated filter is discharged after aeration treatment in the follo...

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Problems solved by technology

[0003] However, after the sewage in the existing biological aerated filter is aerated, it can be discharged in the following two ways: one is to directly overflow the water on the surface of the filter through the water outlet; pumping out; both of these methods will cause the floating dirt on the surface of the sewage to flow out or be pumped away together with the water flow, so that the obtained water needs to be filtered again, which is very troublesome; and it will also make the sewage in the filter tank have a tendency towards sewage Reduce the state of flow, resulting in the accumulation of fillers with microorganisms in the filter tank along with the flow of sewage, resulting in the inability of effective purification of part of the sewage and poor sewage treatment effect

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