Flap aerated biological filter and wastewater treatment method thereof

Abstract

The invention relates to a flap aerated biological filter and a wastewater treatment method thereof. The flap aerated biological filter comprises a filter, water distribution pipes and gas distribution piped, wherein a water collecting channel with a rectangular section is arranged below the middle part of the bottom plate of the filter; the filter and the water collecting channel are divided into two layers by a water collecting channel partition; rows of water distribution pipes and gas distribution lateral pipes are arranged on the water collecting channel partition; a filtering material layer is paved on the water collecting partition; a flap valve is installed on one side of the filter wall; a backwashing water discharge channel is arranged outside the flap valve; a water inflow channel and an overflowing weir are arranged above the flap valve; the water distribution pipes and the gas distribution lateral pipes are buried in the filtering material layer, and are communicated withwater / gas distribution combined vertical pipes; and the filter wall at one side of the water collecting channel is communicated with outflow pipes of an aeration amount control valve and a backwashing gas control valve, an after-filtration water outflow pipe and a backwashing water inflow pipe. By the flap aerated biological filter, two independent aeration and backwashing gas distribution systems of a traditional biological filter are replaced, the investment is reduced, the construction difficulty is reduced and the use utilization of equipment is improved; and the flap aerated biological filter can be widely applied to wastewater treatment process of a biological filter.

Description

technical field [0001] The invention relates to a sewage treatment facility. Background technique [0002] Most of the traditional biological aerated filters currently in operation are V-shaped filter tanks. According to the flow direction of the sewage treatment process, they can be divided into upflow (UBAF) and downflow (DBAF). The two processes have their own advantages, but both have their own advantages. A common defect is that the aeration head and filter head of the filter, the air intake pipe and the backwash air pipe are all set independently, which not only increases the construction investment but also increases the construction difficulty. The bottom is assembled twice, and the flatness is not easy to control, resulting in uneven water and gas distribution. Because the traditional biological aerated filter only forms an air cushion filter at the bottom of the filter plate, the air pressure is not stable enough during aeration and air-water backwashing , affect...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a flap aerated biological filter and its sewage treatment method, to solve the technical problems of further ensuring the quality of aeration and backwashing of the filter and improving work efficiency

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