Technology and method for treating urban sewage by three-section short-cut nitrification/ anaerobic ammonia oxidation

Abstract

The invention provides a technology and a method for treating urban sewage by three-section short-cut nitrification / anaerobic ammonia oxidation, and belongs to the technical field of biological treatment of sewage. A raw water tank, an organic substance removal sequencing batch reactor (SBR), a first regulating water tank, a short-cut nitrification SBR (provided with an on-line monitoring and feedback control system), a second regulating water tank and an autotrophic nitrogen removal up-flow anaerobic sludge bed / blanket (UASB) reactor are sequentially connected in series in the technology; and the sludge is separated according to the sludge age, so that the contradiction between denitrification and phosphorus removal sludge age is solved. By applying the real-time control technology of the short-cut nitrification SBR to the autotrophic nitrogen removal technology, the problems that the half short-cut of low ammonia nitrogen short-cut nitrification in continuous flow is difficult to maintain, the concentration ratio of ammonia nitrogen to nitrous in the effluent is difficult to control and the like are solved. By successfully applying the anaerobic ammonia oxidation technology todeep denitrification treatment of the domestic sewage, urban sewage treatment with high efficiency and low energy consumption is realized.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a three-stage short-range nitrification / anammox process and method for treating urban sewage. Background technique [0002] At present, our country is in a period of rapid economic development. With the growth of economy and the improvement of people's living standards, water consumption continues to increase. Existing sewage treatment plants mostly adopt the traditional biological denitrification process, using organic matter as the carbon source, and converting nitrate nitrogen into nitrogen gas through denitrification. However, the C / N of actual urban sewage is relatively low, and methanol, ethanol, etc. need to be added An external carbon source is used to ensure a high removal rate of total nitrogen TN. At the same time, the traditional process still has problems such as long aeration time, low treatment efficiency, and high operating costs. Therefore, i...

AI Technical Summary

Problems solved by technology

On the one hand, it is difficult to control the short-cut nitrification of continuous flow low ammonia nitrogen, which affects the NO 2 - The control factors of -N accumulation are more complex, and nitrifying bacteria can quickly convert NO 2 - -N converted to NO 3 - -N; on the other hand, people do not pay enough attention to low ammonia nitrogen autotrophic denitrification technology, and this research has been carried out for a short time

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