Device and method for simultaneous short-range nitrification and denitrification phosphorus removal based on hydroxylamine to treat urban sewage

Abstract

A device and method for realizing synchronous short-range nitrification and denitrification phosphorus removal to treat urban sewage based on hydroxylamine belongs to the field of biological treatment of urban domestic sewage. The domestic sewage enters the synchronous short-range nitrification and denitrification phosphorus removal reactor through the inlet pump. In the synchronous short-cut nitrification and denitrification phosphorus removal reactor, the phosphorus accumulating bacteria make full use of the carbon source in the raw water to release phosphorus during anaerobic stirring; the stable short-cut nitrification is achieved by adding hydroxylamine under aerobic conditions; Phosphorous bacteria use nitrite nitrogen as an electron acceptor to absorb phosphorus in water and reduce nitrite nitrogen to nitrogen gas. Compared with the traditional nitrogen and phosphorus removal process, this process saves carbon source and aeration.

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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