A Biofilm Enhanced Nitrogen Removal Process

Abstract

The invention discloses a biofilm enhanced denitrification treatment process. The biofilm enhanced denitrification treatment process is mainly composed of a biofilm enhanced denitrification device, a constant temperature system, a water inlet system, an aeration system, a stirring system, and a sludge return system. The water inlet system pumps waste water containing high ammonia nitrogen from the water inlet I of the outer cylinder through the water inlet I on the outside of the outer cylinder through the center of the bottom of the inner cavity I, and the mixed solution flows into the lower layer from the outer side of the inner cavity II after circulating through the upper layer. After treatment, it flows into the sedimentation tank through the water outlet standpipe inside the inner cavity II, and finally discharges from the water outlet pipe at the upper end of the sedimentation tank. The invention realizes layered internal circulation in the denitrification device, and controls dissolved oxygen, microbial species and sludge concentration in different areas, which is beneficial to optimize the spatial distribution and accumulation of various denitrification functional microorganisms, and further optimizes the micro-ecological environment by using biological fillers. A better denitrification effect is obtained, and it has the advantages of short process flow, clear division, easy control, small footprint, low operating cost, and environmental friendliness.

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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