Device and method for sludge digestive juice semi-partial nitrification anaerobic ammonia oxidation denitrification and denitrifying phosphorus removal coupling system

Abstract

The invention relates to a device and method for a sludge digestive juice semi-partial nitrification anaerobic ammonia oxidation denitrification and denitrifying phosphorus removal coupling system and belongs to the technical field of biological sewage treatment. The device comprises a raw water tank, a denitrifying phosphorus removal reactor, a first regulating water tank, a semi-partial nitrification reactor, a second regulating water tank, an anaerobic ammonia oxidation reactor and a water discharging water tank; the method for the sludge digestive juice semi-partial nitrification anaerobic ammonia oxidation denitrification and denitrifying phosphorus removal coupling system comprises the steps that sludge digestive juice firstly enters the denitrifying phosphorus removal reactor, phosphorus-accumulating bacteria release phosphorus by utilizing a carbon source in raw water, then NO3-N in refluxed anaerobic ammonia oxidation effluent is utilized for carrying out denitrifying phosphorus removal, effluent is discharged into the semi-partial nitrification reactor and the anaerobic ammonia oxidation reactor for realizing removal of ammonia nitrogen in the raw water; one part of effluent of the anaerobic ammonia oxidation reactor is discharged, one part of the effluent of the anaerobic ammonia oxidation reactor is refluxed into the denitrifying phosphorus removal reactor for being used during denitrifying phosphorus removal. The method for the sludge digestive juice semi-partial nitrification anaerobic ammonia oxidation denitrification and denitrifying phosphorus removal coupling system can be applied to biological nitrogen and phosphorus removal of high ammonia nitrogen waste water with low CN ratio, oxygen consumption and energy consumption are reduced compared with the traditional denitrification and phosphorus removal technology, and denitrification and phosphorus removal efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a device and method for a semi-short-path nitrification anammox denitrification and denitrification phosphorus removal coupling system for sludge digestion liquid Background technique [0002] Sludge is a by-product of the sewage treatment plant in the sewage treatment process. When the excess sludge and primary sludge are digested in the sludge digester, methane is produced while being accompanied by the ammonification of organic nitrogen and transferred to the sewage In the sludge digestion liquid, the sludge digestion liquid becomes a typical waste water with high ammonia nitrogen and low CN ratio. Although the amount of sludge digested liquid accounts for only 2% of the whole plant, the ammonia nitrogen load accounts for 15% to 25% of the entire sewage treatment plant. If it is returned to the main reaction area without separate treatment, on the one hand,...

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Problems solved by technology

Although the amount of sludge digested liquid accounts for only 2% of the whole plant, the ammonia nitrogen load accounts for 15% to 25% of the entire sewage treatment plant. If it is returned to the main reaction area without separate treatment, on the one hand, the ammonia nitrogen load will increase. increase, the problem of insufficient carbon sources is further highlighted; on the other hand, in order to make the effluent water quality up to standard, it is necessary to increase the volume of the aeration tank, prolong the nitrification time, and the investment cost will increase significantly

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