Method using delayed anaerobic/low-carbon anoxic sequencing batch reactor (SBR) for realizing municipal sewage short-cut denitrification process

Abstract

The invention discloses a method using a delayed anaerobic / low-carbon anoxic sequencing batch reactor (SBR) for realizing a municipal sewage short-cut denitrification process, and belongs the technical field of sewage biological treatment. Focusing on the bottleneck problem that anaerobic ammonia oxidized nitrite of municipal sewage is hard to stably obtain at the current stage, the SBR is adopted, operation parameters such as the ratio of the municipal sewage to sewage plant secondary water discharging and anoxic stirring time are controlled, the reactor continuously operates under a delayedanaerobic / low-carbon anoxic method, and short-cut denitrification initiation of an organic carbon source provided by the municipal sewage is realized. According to the method using the delayed anaerobic / low-carbon anoxic SBR for realizing the municipal sewage short-cut denitrification process, the use ratio of short-cut denitrification microflora towards the organic carbon source of the municipalsewage is increased, a stable nitrite accumulating rate can be obtained, enrichment of short-cut denitrification functional microbial is realized, and establishment of a short-cut denitrification system is realized; and nitrite obtained from municipal sewage is used as one of significant substrate of the anaerobic ammonia oxidation process, and the method has significance for realizing subsequentmunicipal domestic sewage anaerobic ammonia oxidation advanced nitrogen removal.

Description

technical field [0001] The invention proposes a method for realizing the short-range denitrification process of urban sewage by using a time-delayed anaerobic / low-carbon anoxic SBR, which belongs to the technical field of sewage biological treatment. It is suitable for urban sewage with low carbon-to-nitrogen ratio and the secondary effluent of sewage treatment plants containing nitrate. It has the characteristics of stable accumulation of nitrite, saving additional carbon sources, and easy and flexible regulation. Background technique [0002] Anaerobic ammonium oxidation denitrification technology is a new key technology for energy-saving and consumption-reducing sewage biological treatment. 2 - -N (nitrite nitrogen) to NH 4 + -N (ammonia nitrogen) is oxidized to achieve autotrophic denitrification. Compared with the traditional denitrification process, it can save 60% of the aeration energy consumption. It also has the characteristics of no need for external carbon sou...

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Problems solved by technology

But so far, the short-range denitrification process using complex organic carbon sources in urban sewage as electron donors has not been realized, and there is still a lack of effective methods for its start-up and process regulation

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