Denitrifying biological filter tank using integral water inlet and partition aeration backwashing

Abstract

The invention discloses a denitrifying biological filter tank using integral water inlet and partition aeration backwashing. The biological filter tank comprises a denitrifying filter tank body, a filter plate, filter heads, water inlet pipes, a backwashing water inlet pipe and a plurality of backwashing air intake branch pipes. The filter plate is fixedly installed in the denitrifying filter tankbody; the filter plate and the lower space of the denitrifying filter tank body together form a water distribution chamber; the water inlet pipes and the backwashing water inlet pipe respectively provide water to be treated and backwashing water for the water distribution chamber; the filter heads are fixedly mounted on the filter plate; a water inlet and an air inlet are formed at a lower end ofeach filter head; the plurality of backwashing air intake branch pipes are distributed in the water distribution chamber at intervals; and each backwashing air intake branch pipe supplies air to different regions of the water distribution chamber. The denitrifying biological filter tank effectively improves the phenomenon that the partial filler hardens due to small backwashing force of local aeration, enhances the mass transfer effect of sewage and sludge in a fixed bed, increases an effective volume of a denitrifying reaction zone, and saves the energy consumption of a reactor. The nitratenitrogen removal capacity of the denitrifying biological filter is improved.

Description

technical field [0001] The invention relates to a waste water treatment technology, in particular to a denitrification biofilter with aeration and backwashing in integral water inlet zones. Background technique [0002] As a biofilm treatment technology developed in recent years, biofilter has been widely used. It has the advantages of high treatment efficiency and low suspended solids in the effluent. However, due to the metabolic value-added and polymer release of microorganisms, it is easy to cause the glue between the fillers, which will cause the compaction of the filler sheet area for a long time. [0003] The existing technology often adopts the water distribution and air distribution system of filter plate + filter head. When backwashing, air wash first, short-term impact hardened packing to loosen the surface, and then wash with water to wash the detached biofilm out of the reactor. [0004] Since the combination of water distribution and air distribution of the ...

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Problems solved by technology

Finally, serious short flow of filter material is caused, which affects the overall efficiency of the reactor

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