Device and method for realizing synchronous short-process nitrification and denitrification dephosphorization to treat urban sewage on basis of hydroxylamine

Abstract

The invention provides a device and a method for realizing synchronous short-process nitrification and denitrification dephosphorization to treat urban sewage on the basis of hydroxylamine, and belongs to the field of urban domestic sewage biological treatment. The domestic sewage enters a synchronous short-process nitrification and denitrification dephosphorization reactor through a water inlet pump. In the synchronous short-process nitrification and denitrification dephosphorization reactor, during anaerobic stirring, phosphorus-accumulating bacteria sufficiently utilize carbon source release phosphorus in raw water; during the aerobiotic treatment, the stable short-process nitrification is realized through addition of hydroxylamine; under the anoxic condition, denitrifying phosphorus-accumulating bacteria use nitrite nitrogen as electron acceptors to absorb phosphorus in the water; nitrite nitrogen is reduced into nitrogen gas. Compared with a conventional denitrification dephosphorization process, the process has the advantages that the carbon source is saved; the aeration quantity is reduced.

Description

technical field [0001] The invention relates to a device and method for synchronous short-range nitrification and denitrification dephosphorization treatment of urban sewage based on hydroxylamine, which belongs to the field of sewage biological treatment, and is especially suitable for denitrification of urban domestic sewage with low C / N. Background technique [0002] In recent years, the denitrification and phosphorus removal of urban sewage has attracted much attention. If the effluent of urban sewage treatment plants does not meet the standard, it will cause a series of environmental problems such as eutrophication of the water body, and there is also the problem of high treatment costs. The high energy consumption of the traditional nitrogen and phosphorus removal process mainly exists in the links of aeration and carbon source consumption. [0003] As we all know, the whole nitrification reaction is carried out under the action of ammonia oxidizing bacteria (AOB) and ...

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Problems solved by technology

[0002] In recent years, the denitrification and phosphorus removal of urban sewage has attracted much attention. If the effluent of urban sewage treatment plants does not meet the standard, it will cause a series of environmental problems such as eutrophication of the water body, and there is also the problem of high treatment costs.

The high energy consumption of the traditional nitrogen and phosphorus removal process mainly exists in the links of aeration and carbon source consumption

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