Upward-flow biological aerated filter

Abstract

The invention discloses an upward-flow biological aerated filter, which is provided with a biofilter (10). The filter is characterized in that the biofilter (10) is separated into a plurality of sub-grid areas (6) equal in size through baffles (8), and each sub-grid area (6) is correspondingly provided with an independent flushing device. By adopting a sub-grid structure, the filter and a gas-water system can be arranged to be a plurality of units, and the bottom of the filter is provided with the independent flushing devices to flush sub-grids one by one so as to shorten flushing time, save water and gas for flushing and ensure better flushing effects. The filter has the advantages of improving flushing efficiency, ensuring uniform flushing intensity, maintaining biofilm activity, preventing blockage and improving the production efficiency of the biological aerated filter.

Description

Technical field: [0001] The invention relates to an internal structural form of an aerated biological filter for sewage treatment, in particular to an upward flow aerated biological filter for improving flushing efficiency and effect. Background technique: [0002] The biological aerated filter is structurally divided into a buffer water distribution area, a supporting layer and a filter layer, an outlet area and an outlet tank. The sewage to be treated flows into the buffer water distribution area from the pipeline. When the sewage flows into the filter material layer, it is purified by the microbial film attached to the filter material and then discharged. The function of the buffer water distribution area is to make the sewage evenly flow through the cross section of the filter pool. The sewage to be treated enters the filter tank, and at the same time, the air (oxygen source) required for the metabolism of the microbial film is supplied by the blower, and the microbial ...

AI Technical Summary

Problems solved by technology

However, when the filter layer of the biological filter is relatively thick, and when the filter tank with large specific gravity such as quartz sand and ceramsite is used, it is easy to produce uneven flushing and clogging of the filter material.

The area with low flushing intensity cannot meet the requirements, so that the impurities in the biological filler in this area cannot be washed cleanly, which will affect the removal effect of the biological filter on pollutants; the area with high flushing intensity will be impulsively supported due to the excessive water flow velocity. layer, causing the mixing of the biological filler and the supporting layer, and even the loss of the biological filler, and sometimes the loosening of the air distribution system, causing great harm to the biological aerated filter

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