Method for deeply treating sludge anaerobic digestion solution and urban sewage with partial-nitrification, ANAMMOX and short-cut-denitrification technology

Abstract

The invention discloses a method for deeply treating a sludge anaerobic digestion solution and urban sewage with a partial-nitrification, ANAMMOX and short-cut-denitrification technology. The method includes the steps that the sludge anaerobic digestion solution enters a partial-nitrification reactor, a part of ammonia and nitrogen is converted into nitrite nitrogen, the product is pumped into an ANAMMOX reactor for removing, drained water with nitrate nitrogen and sanitary sewage enter a short-cut-denitrification reactor, the nitrate nitrogen is converted into nitrite nitrogen under organic carbon sources in the sanitary sewage, the product flows back to the ANAMMOX reactor, the nitrite nitrogen, and ammonia and nitrogen in the sanitary sewage are synchronously removed, and therefore the sludge anaerobic digestion solution and the urban sewage are synchronously and deeply treated. According to the method, the nitrogen removing rate is high, drained water can be discharged without following treatment, and the problem that excessive nitrate is contained in high-ammonia-nitrogen low-carbon-nitrogen-ratio sludge digestion solution ANAMMOX treatment drained water is solved; meanwhile, synchronous treatment of the urban sewage is achieved, and the running cost of a sewage treatment plant is greatly reduced.

Description

technical field [0001] The invention relates to a synchronous low-carbon-nitrogen (C / N) ratio sludge digestion liquid and urban domestic sewage denitrification technology, which belongs to the technical field of sewage biological treatment. Background technique [0002] During the anaerobic digestion of sludge in urban sewage treatment plants, microorganisms release the organic nitrogen in the sludge into the supernatant through deamination, resulting in a concentration of ammonia nitrogen in the digestion solution as high as 600 mg / L or more; in addition, because the methanogenic bacteria will The consumption of organic matter in the digestion process greatly reduces the concentration of organic matter in the digested liquid. Therefore, the sludge digested liquid becomes a typical waste water with high ammonia nitrogen and low carbon nitrogen ratio. Although its water volume only accounts for about 2% of the entire sewage treatment plant, the ammonia nitrogen load accounts ...

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Problems solved by technology

[0005] In addition, since the short-range denitrification process requires electron donors, it is generally necessary to add an external carbon source, which increases operating costs to a certain extent.

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