Device and method for realizing synchronous short-range nitrification and denitrification phosphorus removal by using sludge fermentation product under the condition of intermittent aeration

Abstract

The invention relates to a device and method for realizing synchronous short-range nitrification and denitrification phosphorus removal under the condition of intermittent aeration by using sludge fermented matter, belonging to the field of urban sewage treatment and sludge biochemical treatment. Synchronous short-cut nitrification and denitrification phosphorus removal is carried out in the SBR reactor, and the remaining sludge is discharged into the side closed reactor for anaerobic fermentation, and then the fermented product and domestic sewage are mixed and pumped into the SBR reactor through a peristaltic pump. Anaerobic phosphobacteria (PAOs and DPAOs), polysaccharide bacteria (GAOs) and denitrifying polysaccharide bacteria (DGAOs) can store and utilize easily degradable carbon sources produced during sludge fermentation in a timely manner, followed by intermittent aeration to achieve degradable carbon sources. Nitrogen and phosphorus removal. At the same time, the inhibition degree of the fermentation product to nitrite oxidizing bacteria (NOB) is stronger than that of ammonia oxidizing bacteria (AOB), so as to achieve the purpose of elutriating NOB. This process is suitable for the deep denitrification and dephosphorization of domestic sewage with low C/N and low C/P, and at the same time can realize the reduction of excess sludge and resource utilization.

Description

technical field [0001] The invention relates to a device and a method for realizing synchronous short-range nitrification and denitrification phosphorus removal by using sludge fermented matter under intermittent aeration conditions, and belongs to the fields of urban sewage treatment and sludge biochemical treatment. Background technique [0002] The basic principle of short-range nitrification and denitrification is to control the temperature, dissolved oxygen, pH, sludge age and other conditions to inhibit the growth of nitrite oxidizing bacteria, so that the nitrification reaction stops when nitrite is generated, and no further oxidation into Instead, nitrate acts directly as an electron acceptor for denitrification to remove nitrogen from the water. Short-cut nitrification and denitrification can reduce the amount of oxygen demand (about 25%) and organic carbon sources (about 40%), thereby reducing operating energy consumption and operating costs. Synchronous short-ran...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is a device and method for realizing synchronous short-range nitrification and denitrification dephosphorization using sludge fermented matter under intermittent aeration conditions. Problems such as high energy consumption, excess sludge treatment, volume reduction and effluent not reaching Grade A, and high treatment costs

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