Device and method for obtaining anaerobic ammonia oxidation matrix from municipal sewage through continuous flow endogenous short-range denitrification

Abstract

The invention belongs to the technical field of sewage treatment, and relates to a device and method for obtaining an anaerobic ammonia oxidation matrix from municipal sewage through continuous flow endogenous short-range denitrification. An AOA continuous flow process is used for directly surpassing part of a mud-water mixture in an anaerobic zone to an anoxic zone, and by regulating the ratio ofthe water inlet flow of the municipal sewage to the flow of the surpassed mud-water mixture, the mass concentration ratio of ammonia nitrogen to nitrite nitrogen in effluent is stabilized at 1 to 1.32; and the endogenous denitrification process of GAOs only proceeds to the nitrite stage, the organic carbon source requirements are saved, aerobic phosphorus absorption and denitrification and phosphorus removal are coupled with endogenous short-range denitrification, phosphorus removal, carbon removal and stable nitrite accumulation of the municipal sewage without additional carbon sources are achieved, a stable reaction matrix of the ammonia nitrogen and the nitrite nitrogen is provided for the anaerobic ammonia oxidation process, the problem that the accumulation rate of the nitrite is notprone to being stabilized and maintained during short-range nitrification is solved, and a new idea is provided for practical engineering application of a mainstream anaerobic ammonia oxidation process of the municipal sewage.

Description

Technical field: [0001] The invention belongs to the technical field of sewage treatment, and relates to a device and method for obtaining anaerobic ammonia oxidation substrate from urban sewage through continuous flow internal source short-range denitrification, which is suitable for low-carbon urban domestic sewage and decentralized rural domestic sewage treatment processes upgrades, etc. Background technique: [0002] Anammox technology, because of its great advantages of low energy consumption, low sludge production and high nitrogen removal rate, has been widely accepted as the most economical and sustainable biological nitrogen removal process. At present, anaerobic ammonium oxidation has been successfully applied to the treatment of high ammonia nitrogen wastewater (such as landfill leachate, sludge digestate and pig farm wastewater), but its application in low ammonia nitrogen urban sewage treatment is still subject to many influences, mainly including Unstable accu...

AI Technical Summary

Problems solved by technology

In the endogenous short-range denitrification system of urban sewage, phosphorus accumulating bacteria and polysaccharide bacteria are highly enriched, which can realize the efficient utilization and storage of limited organic carbon sources in raw water, and use them for aerobic phosphorus uptake, reaction Nitrification phosphorus removal and endogenous short-range denitrification, which solve the problems of unstable nitrous accumulation, high oxygen consumption, high energy consumption, and waste of organic carbon sources in raw water in the traditional short-range nitrification process

At present, the mainstream anammox process of urban sewage has problems such as unstable supply of nitrite nitrogen, incomplete nitrogen removal, and easy waste of organic carbon sources in raw water.

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