SBR partial nitrosation process matching anaerobic ammonium oxidation

Abstract

The invention discloses an SBR partial nitrosation process matching anaerobic ammonium oxidation. The SBR partial nitrosation process comprises the following steps: S1, sludge domestication preprocessing: firstly inoculating the sludge, standing and precipitating for 24 hours, wherein a great amount of flotages remain on the upper layer, removing, adding a given amount of test water, performing the stuffy aeration for 48 hours, removing residual organic matters in the sludge by using the endogenous respiration effect of the microorganisms, and finally standing for 24 hours. After the standing,the color of the sludge is changed to sepia, an SV value is determined as 32 percent, the sludge concentration MLSS is 3800mg / L, which shows that the activity of the sludge after the stuffy aerationand standing treatment is already restored, and the inoculation requirement can be met. At the stable operation phase, the removal rate of NH4<+>-N and the accumulation rate of NO2<->-N are respectively up to 90 percent and 80 percent or more.

Description

technical field [0001] The invention relates to the technical field of SBR partial nitrosation, in particular to an SBR partial nitrosation process matching anaerobic ammonium oxidation. Background technique [0002] The influent water required for the anaerobic ammonium oxidation reaction is strictly limited, and the NH in the water 4 + -N / NO 2 - The ratio of -N should be kept stable at about 1:1.32. If nitrite is artificially added, it will not only increase the operating cost, but also cause secondary pollution due to its biological toxicity. This requires a pre-reaction stage that can provide stable effluent, so that the NH in the effluent of this stage 4 + -N / NO 2 The ratio of -N is maintained between 1:1 and 1:1.32, which creates a partial nitrosation (Partial Nitritation, PN) process. [0003] The present invention utilizes the SBR reactor to carry out the experimental research of the partial nitrosation process. The test first starts the reactor under the cond...

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Problems solved by technology

[0002] The influent water required for the anaerobic ammonium oxidation reaction is strictly limited, and the NH in the water 4 + -N / NO 2 - The ratio of -N should be kept stable at about 1:1.32. If nitrite is artificially added, it will not only increase the operating cost, but also cause secondary pollution due to its biological toxicity.

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