Device and method for coupling short-cut denitrification phosphorus removal with anaerobic ammonia oxidation

Abstract

The invention discloses a device and a method for coupling short-cut denitrification phosphorus removal with anaerobic ammonia oxidation, and belongs to the field of biological sewage. The method comprises the following steps: performing anaerobic phosphorus release on phosphorus-accumulating bacteria by utilizing organic carbon sources in domestic sewage after municipal sewage flows into an A2O-SBR reactor and synthesizing into a PHA storage body; enabling a portion of nitration liquid in an N-SBR reactor to flow back to the A2O-SBR reactor for performing oxygen deprivation reaction; performing micro-aeration on the A2O-SBR reactor after the oxygen deprivation reaction is finished so as to complete the absorption of surplus phosphorus and air stripping of nitrogen; standing and precipitating; introducing a portion of drained water of the A2O-SBR reactor into the N-SBR reactor to finish short-cut denitrification; keeping stand and precipitating after short-cut reaction; enabling a portion of supernate to flow back to an oxygen deprivation section of the A2O-SBR reactor and introducing the other portion of supernate and the other portion of drained water of the A2O-SBR reactor into an Anammox-SBR reactor for performing anaerobic ammonia oxidation. According to the device and the method, the carbon sources are reduced, the aeration rate is reduced, the nitrogen and phosphorus removal efficiency is increased, the yield of sludge is reduced, the device and the method are suitable for municipal sewage with low C / N ratio, and the synchronous depth nitrogen and phosphorus removal requirement is met.

Description

technical field [0001] The invention relates to a device and method for short-range denitrification and phosphorus removal coupled with anaerobic ammonium oxidation, belonging to the technical field of sewage biological treatment. Background technique [0002] At present, the main contradiction of sewage treatment has changed from the removal of organic pollutants to the removal of nitrogen and phosphorus pollutants. The eutrophication caused by pollutants such as nitrogen and phosphorus, which has attracted much attention, not only destroys the water environment, but also affects human health. Therefore, it is urgent to solve the problem of water environment pollution caused by pollutants such as nitrogen and phosphorus. In recent years, various biological treatment methods have been widely used in various sewage treatment. However, due to the low C / N ratio, high TN concentration in the effluent, and the contradiction between the sludge age of nitrifying bacteria and phosph...

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Problems solved by technology

[0005] The invention provides a device and method for short-range denitrification and phosphorus removal coupled with anaerobic ammonium oxidation. This invention solves the problem of insufficient carbon source in raw water, the contradiction between the sludge age of phosphorus accumulating bacteria and nitrifying bacteria, and the traditional nitrogen and phosphorus removal process effluent TN Concentration is too high and other problems, and save operating costs, to achieve synchronous depth of nitrogen and phosphorus removal

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