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Civil biological aerated filter

Country/Region china
Company ddrxhb company
Categories High Efficiency Air Filter
Telephone 86-0415-2171779
ICP License Issued by the Chinese Ministry
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    Civil biological aerated filter

    Civil biological aerated filter

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    • category:Integrated sewage treatment equipment

    • clicks:114
    • pubdate:2016/08/01
    • inquiry

    First, equipment overview

    Biological aerated filter is a new technology of sewage treatment in the beginning of 90s. It has been widely popular in developed countries such as Europe, America, Japan and so on. The process has the removal of SS, COD, BOD, nitrification, removal nitrogen and phosphorus removal, the removal of AOX (hazardous material), its characteristics is biological oxidation and retention of suspended solids in one, save the subsequent sedimentation tank (the secondary sedimentation tank), the volume load and hydraulic load, short hydraulic retention time, less investment in infrastructure, effluent quality good: low energy consumption and operation cost of the province.

    BAF is the third generation of biofilm reactor, which not only has the advantages of biofilm process technology, but also plays an effective role in the spatial filtering, through the use of special filter material and the correct distribution of gas.

    Two, equipment picture

    Three, working principle

    Biodegradation of wastewater through the filter layer, water containing pollutants are filter material layer interception, and was attached to the filter transformation, at the same time, dissolved organic matter and specific substance is also removed, the sludge generated retained in the filter layer, while leaving the water purification through, in a closed reactor reached complete biological treatment without in the downstream of the secondary sedimentation tank sludge sedimentation.

    Filter bottom is provided with a water inlet and a sludge discharging pipe and in the upper part is the filler layer, the thickness of 2.5 ~ 3.5m, in order to prevent the loss of filter media, filter bed above the set is provided with a filter head concrete baffle, filter head can be from surface to remove without emptying filter bed, easy maintenance. The upper space of the baffle plate is used as the water storage area of the back flushing water, and the height of the baffle plate is determined according to the head of the reverse flushing water.

    A reflux pump is arranged in the area, which is used for filtering the filter out of the water pump to the water distribution corridor, and then returning to the bottom of the filter to realize denitrification. Filling layer bottom and the space of filter bottom are used for the expansion of packing in the back flushing and regeneration.

    Filter air supply system is divided into two sets of pipeline, fillers are arranged in layers within the process air pipe for aeration process (mainly by the aeration fan to provide aeration) and filler layer is divided into two: upper oxic zone, lower anoxic zone. According to different raw water quality, treatment purposes and requirements, the height of the filling layer is different, aerobic zone, anaerobic zone, the proportion of the corresponding change; filter the bottom of the air pipeline is the anti flushing air pipe.

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