Lower water-inlet, lower aeration and upper water-outlet biological active carbon filter tank

Abstract

The invention relates to a lower water-inlet, lower aeration and upper water-outlet biological active carbon filter tank. The biological active carbon filter tank comprises a tank body, a biological active carbon material-filtering layer, a water distribution device, a filtering head, a supporting plate, an air distribution device and a purified water catching groove, wherein the water distribution device, the filtering head, the supporting plate, the air distribution device and the biological active carbon material-filtering layer are arranged in the tank body sequentially from the bottom to the top; and a water distribution inlet of the water distribution device and an air inlet of the air distribution device are both extended out of the tank body. The lower water-inlet, lower aeration and upper water-outlet biological active carbon filter tank has the advantages that: a lower water-inlet, lower aeration and upper water-outlet mode is adopted, and water and air flow towards the same direction and rise in a plug-flow mode, so that the resistance of a filter material to water is reduced and the filtering speed of sewage can be maintained stably and uniformly; simultaneously, the upward impact force applied to the filter material is increased, so that the filter material is in a swollen state; at the moment, the filter material is fully mixed with water and air so as to improve the membrane-filtering effect of the filter material; and the filter material is in the swollen state and is difficult to harden, so that the flushing frequency of the filter tank is reduced.

Description

technical field [0001] The invention relates to a bioactivated carbon filter with bottom water inlet, bottom aeration, and top water outlet, which is suitable for the treatment of polluted river water and slightly polluted rivers and lakes, and can also be used for the construction of high-quality reclaimed water plants. Background technique [0002] There are various forms of pollutants (dissolved, suspended, colloidal substances, microorganisms, etc.) in polluted rivers, slightly polluted rivers and lakes. When using biological activated carbon purification tanks for treatment, water distribution from the upper inlet and water outlet from the upper outlet are generally used. The method, its disadvantage is: because the water in the upper water inlet method falls in the way of gravity flow, the amount of biofilm on the filter material is small at the initial stage of filter operation, the resistance to water is small, and the filtration rate is large. Finally, the amount of...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an ozone-biological activated carbon water purification method and device to solve the problems of low processing efficiency, high processing cost, complex backwashing device structure and cumbersome operation in the prior art

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