Biological membrane enhanced denitrifying treatment technology

Abstract

The invention discloses a biological membrane enhanced denitrifying treatment technology. The biological membrane enhanced denitrifying treatment technology is mainly composed of a biological membraneenhanced denitrifying device, a constant-temperature system, a water inlet system, an aerating system, a stirring system and a slurry refluxing system, wherein the water inlet system pumps wastewatercontaining high ammonia-nitrogen in from a water inlet formed in the outer side of an outer barrel through the central position of the bottom of an inner cavity I, mixed liquid flows into a lower layer from the outer periphery of an inner cavity II after internal circulation in an upper layer, the treated mixed liquid flows into a sedimentation tank through a water outlet vertical pipe in the inner cavity II, and finally, the mixed liquid is drained out from a water outlet pipe at the upper end of the sedimentation tank. The biological membrane enhancing and denitrifying treatment technologydisclosed by the invention achieves layered internal circulation and zone control on dissolved oxygen and microorganism species and sludge concentration in the denitrifying device, is favorable for optimizing space distribution and accumulation of varieties of denitrifying functional microorganisms, utilizes biological packing to further optimize a micro-ecological environment to obtain a better denitrifying effect and has the advantages of short technological process, accurate zone partition, easiness in control small floor area, low operation cost, environmental friendliness and the like.

Description

technical field [0001] The invention relates to a biofilm enhanced denitrification treatment process, which belongs to the technical field of denitrification of sewage and wastewater. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, the issue of water eutrophication has received widespread attention. Strict standards have been formulated at the national and local levels, setting limits on the discharge of indicators such as ammonia nitrogen and total nitrogen, and strictly controlling the discharge of nitrogen from domestic sewage and industrial wastewater. Therefore, the biological denitrification technology of sewage wastewater has been deeply studied and widely used. [0003] The traditional biological denitrification process generally adopts the anaerobic and aerobic process, and the anaerobic and aerobic process connects the front anoxic section and the rear aerobic section in series. In the anoxic ...

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Problems solved by technology

[0006] The problems to be solved by the present invention are: long process flow, complicated operation, insufficient sludge concentration, insufficient microbial biomass in the reactor, difficulty in controlling the dissolved oxygen concentration, and unstable long-term denitrification performance in the prior art and other technical problems, the present invention provides a biofilm enhanced denitrification treatment process with low cost, simple operation, easy control, good denitrification effect and stable long-term operation performance

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