Urban sewage deep denitrification device for efficient short-cut nitrification and method thereof

Abstract

The invention relates to the technical field of sewage denitrification, and discloses a urban sewage deep denitrification device for efficient short-cut nitrification, which comprises an upflow reactor, the lower part of the upflow reactor is a reaction zone, and the upper part of the upflow reactor is a buffer precipitation zone; the upflow reactor is provided with a water outlet at the top of the buffer settling zone and a return pipe at the bottom of the buffer settling zone, and one end of the return pipe far away from the buffer settling zone is connected to the bottom of the reaction zone; the bottom of the upflow reactor is connected to a water tank through a water inlet pipe; the bottom of the upflow reactor is provided with an aeration device for stirring up-flow; and a dissolved oxygen monitoring device for detecting dissolved oxygen is arranged at the top. The invention further provides an efficient short-cut nitrification urban sewage deep denitrification method, an air-lift circulating short-cut nitrification process has very high volume efficiency, and the short-cut nitrification efficiency is effectively improved. The structure is simple, the dissolved oxygen control difficulty can be effectively reduced, and good operation stability is achieved.

Description

technical field [0001] The invention belongs to the technical field of denitrification of sewage, and in particular relates to a high-efficiency short-range nitrification deep denitrification device for urban sewage and a method thereof. Background technique [0002] Nitrogen in water is an important factor causing eutrophication of water. Among them, sensitive water bodies often have stricter water quality requirements than Class A discharge standards. For example, the Beijing-Tianjin region requires 10mg / L of effluent total nitrogen, and the EU sewage discharge standard stipulates that the TN limit for cities with a population of more than 100,000 is 10mg / L etc. Therefore, further deep denitrification after traditional sewage treatment is of great significance. [0003] With the development of biological nitrogen removal theory and technology, many new biological nitrogen removal processes, short-cut nitrification processes, anammox processes, and their combinations hav...

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