Device and method for single-stage aoa-sbbr to strengthen deep denitrification and phosphorus removal of endogenous denitrification sewage

Abstract

A single-stage AOA-SBBR device and method for strengthening deep denitrification and phosphorus removal of endogenous denitrification sewage belongs to the technical field of sewage biological treatment. The method is as follows: the sewage enters the single-stage AOA-SBBR strengthened endogenous denitrification reactor through the water inlet pump, and in the anaerobic stirring stage, the phosphorus accumulating bacteria and polysaccharide bacteria make full use of the organic carbon source in the raw water to store the internal carbon source, at this time Accompanied by the release of phosphorus by phosphorus-accumulating bacteria; during the aeration and stirring stage, nitrifying bacteria release NH in raw water 4 + ‑N to NO 3 ‑ ‑N, accompanied by the aerobic phosphorus uptake by phosphorus accumulating bacteria; in the stage of anoxic stirring, NO 3 ‑ ‑N is used by phosphorus-accumulating bacteria and glycan bacteria to achieve endogenous denitrification. In the present invention, by adding the nitrifying bacteria filler, the anoxic section is rear-positioned under the premise of ensuring the biomass of the nitrifying bacteria, which effectively solves the competition between the denitrifying bacteria, the phosphorus accumulating bacteria and the polysaccharide bacteria for the substrate, and can save energy, On the basis of making full use of carbon sources, the synchronous deep denitrification and phosphorus removal of sewage can be realized.

Description

technical field [0001] The single-stage AOA-SBBR device and method for strengthening the deep denitrification and dephosphorization of endogenous denitrification sewage related to the present invention belong to the technical field of sewage biological treatment, and are a test device and method for strengthening low-carbon synchronous deep denitrification and dephosphorization of sewage. method. Background technique [0002] With the development of economy and society and the improvement of people's living standards, the phenomenon of eutrophication caused by nutrients such as nitrogen and phosphorus in sewage is becoming more and more serious, and the discharge standards of water bodies are becoming increasingly strict. It is urgent to develop in the direction of high efficiency and low energy consumption. [0003] The traditional biological denitrification technology generally adopts nitrification and denitrification process. Under aerobic conditions, ammonia nitrogen is...

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Problems solved by technology

However, the carbon-to-nitrogen ratio of sewage in my country is generally low, and the addition of carbon sources will greatly increase the cost of sewage treatment. The lack of carbon sources has become a bottleneck for nitrogen and phosphorus removal in sewage.

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