Improved denitrification method of SBR

Abstract

The invention discloses a denitrification method of an improved SBR (sequencing batch reactor). According to the method, the advantages of SBR and anaerobic ammonia oxidation are combined, anaerobic ammonia oxidizing bacteria are added into an SBR on the basis of a traditional SBR process, and anoxic and aerobic alternate circulation of the reactor is controlled in an intermittent aeration mode. Through multiple alternation of an anoxic environment and an aerobic environment in an operation period, accumulation of nitrite is effectively realized, and sufficient reaction substrates are providedfor an anaerobic ammonia oxidation process, so that denitrification of the improved SBR is realized. According to the method disclosed by the invention, the defects of an SBR process and an anaerobicammonia oxidation process are effectively overcome; the SBR process and the anaerobic ammonia oxidation process are coupled to realize a good denitrification function; the energy consumption is reduced, an organic carbon source does not need to be additionally added, the operation cost is reduced, the biomass in the reactor can be ensured by the operation method, and microorganisms in each stagecan fully exert own advantages and functions. The denitrification method has obvious advantages in treating sewage with high ammonia nitrogen and low carbon nitrogen ratio.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment, in particular to an improved SBR denitrification method. Background technique [0002] With the increasingly serious eutrophication of water bodies, denitrification has become the focus of sewage treatment. In the sewage treatment process, the SBR process has the advantages of simple process, flexible operation mode, saving investment, less land occupation, low operating cost, resistance to organic load and toxic load impact, etc., and is widely used. However, its denitrification efficiency is not high and the sludge stability is poor. In the process of treating sewage with a low carbon to nitrogen ratio, it is often necessary to add carbon source substances. Although the external carbon source is simple, the cost is high, and the sewage treatment plant is unbearable. Anammox, as a new denitrification process, has the advantages of no external organic carbon s...

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Problems solved by technology

However, anammox bacteria also have certain disadvantages, such as strict environmental requirements, low proliferation rate, and long reactor start-up time.

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