Autotrophic nitrogen removal integrated system based on MBBR and quick starting method

Abstract

The invention discloses an autotrophic nitrogen removal integrated system based on MBBR and a rapid starting method, and belongs to the technical field of biological nitrogen removal of wastewater. The problems that in the prior art, a short-cut nitrification reactor and an anaerobic ammonia oxidation reactor need to be placed separately, consequently, the system occupied area is large, and process control is complex are solved. The system comprises a reaction tank, a stirring device, an aeration device, a main water inlet pipeline, a main water outlet pipeline and an exhaust pipeline; the reaction tank comprises a reaction tank main body, a first reaction tank and a second reaction tank are arranged in an inner cavity of the reaction tank main body, the first reaction tank is positioned above the second reaction tank, and a separation plate is arranged between the first reaction tank and the second reaction tank. Short-cut nitrification and anaerobic ammonia oxidation or CANON coupling are combined into an integrated device, an anaerobic ammonia oxidation zone can be aerated according to the system operation condition to achieve the CANON function of the zone, and the system has the advantages of being small in occupied area, small in inoculation proportion, fast in starting, high in denitrification load, high in impact resistance and the like.

Description

technical field [0001] The invention relates to the technical field of wastewater biological denitrification, in particular to an MBBR-based autotrophic denitrification integrated system and a quick start method. Background technique [0002] At present, with the in-depth understanding of nitrogen conversion, the application of biological denitrification has increased, and researchers have proposed new biological denitrification methods, such as partial short-range nitrification-anaerobic ammonia oxidation (PN / A), and traditional biological denitrification methods. Compared with denitrification technology, this method oxidizes ammonia nitrogen into nitrous by short-range nitrification, which saves about 60% of oxygen demand, effectively reduces energy consumption and investment costs; Nitrate acts as an electron acceptor to combine ammonia nitrogen and nitrous nitrogen to form nitrogen gas, which saves processing costs without the need for additional carbon sources. This me...

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Problems solved by technology

The device is an integrated denitrification device. Although it saves space, it uses activated sludge and fixed bed packing for autotrophic denitrification reaction, which requires sludge reflux, and fixed bed packing also needs regular backwashing.

[0009] Through the research of the above existing process methods, it is found that the short-range nitrification reactor and anaerobic ammonium oxidation reaction in the prior art have the disadvantage of occupying a large area, and the activated sludge system is mostly used, and the effluent needs to pass through the secondary settling tank, which has the disadvantage of occupying an area Large or backwashing is required, so there is an urgent need for an integrated autotrophic denitrification system based on MBBR that is easy to operate and occupies less space.

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