Aerated biological activated carbon filters and method of applying same to purify feed water

Abstract

The invention discloses aerated biological activated carbon filters and a method of applying the same to purify feed water. Each up-flow aerated biological activated carbon filter comprises a water inlet tube, water and air distribution troughs, water and air distribution zones, a filter plate, a single-hole membrane aerated filter head, a coarse sand cushion and dual-layer granular activated carbon filters. The aeration system of the single-hole membrane aerated filter head is adopted for filter aeration. The mode of washing combining air and water is adopted for washing the filter. During washing, a perforated air distribution tube arranged in the water and air distribution zone at the bottom of the filter is adopted to blast air to the filter and aerate the filter, so that the filter washing water is drained from a blow-down tube at the bottom of the filter from top to bottom. The water flowing out of a sedimentation tank is distributed by a water distribution channel, then flows through the coarse sand cushion and the dual-layer granular activated carbon filters of the filter from bottom to top and is intercepted, filtered, absorbed and biologically degraded by the activated carbon filters and the micro-organisms attached to the activated carbon filters to remove the contaminants in the water. The filters have high purification efficiency of contaminants, good washing effect and low cost, save energy and are suitable for biological feed water treatment of micro-polluted water.

Description

technical field [0001] The invention relates to the field of water supply treatment, in particular to an aerated biological activated carbon filter for treating slightly polluted water. Background technique [0002] For water sources that are slightly polluted by ammonia nitrogen and organic matter, biological water treatment technology is often used at home and abroad. Biological treatment is an effective and most economical method to remove ammonia nitrogen and organic matter. The concentration of pollutants such as organic matrix, ammonia nitrogen and nitrite nitrogen in slightly polluted water is very low compared with that in sewage. The biological treatment of micro-polluted water generally uses the biofilm method. Various biological treatment processes often use different inert media (such as quartz sand, ceramsite, granular activated carbon, plastic honeycomb tube packing and elastic three-dimensional packing, etc.) as biological carriers. Under the condition of su...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the existing upflow type aerated biological activated carbon filter, and provide an aerated biological activated carbon filter for treating slightly polluted water to be filtered containing pollutants such as ammonia nitrogen and organic pollutants

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