A method for starting and controlling partial nitrosation

Abstract

The invention discloses a start and control method for partial nitrosation, belongs to the field of sewage treatment and solves the problems that start is not easy, the nitrite accumulation effect isunstable and the like in the conventional nitrosation process. The method comprises the steps as follows: nitration start, intermittent aeration start, nitrite accumulation rate control, ammonia oxidation rate control, stable operation control of nitrosation and the like. The final ammonia nitrogen oxidation rate is stabilized at 55%-60%, nitrite accumulation rate is stabilized to be higher than or equal to 92%, the ammonia nitrogen removal surface load is higher than or equal to 0.60 gN / (m<2>.d), and requirements of subsequent anaerobic ammonia oxidation for nitrogen are met. The partial nitrosation effect is stable, the ammonia nitrogen oxidation load is high, the occupied area is saved, operation is simple, and running is reliable; compared with the traditional process, the method can realize selection and elimination of microorganisms and prevent long-term operation instability; the oxygen utilization rate is high, and aeration fluidization energy consumption is low.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method for starting and controlling partial nitrosation. Background technique [0002] Anaerobic Ammonium Oxidation (ANAMMOX for short), based on NO 2 - -N is electron acceptor, CO 2 As an inorganic carbon source, under anaerobic conditions, the NH 4 + -N oxidation to N 2 biological process. Compared with the traditional nitrification-denitrification process, the ANAMMOX process has the advantages of saving 50% of the aeration rate and 100% of the organic carbon source, so once discovered, it has aroused the interest of many researchers. [0003] Since the anaerobic ammonium oxidation process requires ammonia nitrogen and nitrite nitrogen with a ratio of 1:1.31 as a substrate, a pretreatment process is required to partially oxidize ammonia nitrogen to nitrite nitrogen without generating nitrate nitrogen, that is, partial nitrosation process, also known as nitr...

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Problems solved by technology

[0030] In order to solve the problems in the prior art that the nitrosation process is difficult to operate continuously, the ratio of effluent nitrogen is unstable, the long-term operation is easy to convert to the whole process of nitrification, and the sludge concentration in the system is difficult to maintain, etc., the present invention proposes a partial nitrosation start-up and Control method, which has the advantages of continuous operation, stable treatment effect, long-term operation stability, precise control of effluent nitrogen ratio, convenient management and maintenance, etc.

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