Double-filler denitrification biological method for reducing nitrous oxide emission and application device

Abstract

The invention discloses a double-filler denitrification biological method for reducing nitrous oxide discharge and an application device. The application device comprises a reactor, a water inlet tank connected to one side of the reactor, a sludge tank connected to the other side of the reactor, an automatic feeder connected to the top of the reactor and a water decanter arranged on one side of the top of sewage in the reactor. Sewage in the reactor is filled with double fillers. The method is suitable for lower C / N, and has the advantages that the consumption of a carbon source in a traditional denitrification nitrogen removal process is reduced; the nitrogen removal rate of denitrification is improved, the nitrogen removal load of the reactor is high, the reaction time is shortened, and the effective utilization rate of the volume of the reactor is improved; the generation amount and the escape amount of greenhouse gas N2O in a traditional denitrification nitrogen removal process are effectively reduced, and the purpose of reducing carbon emission is achieved.

Description

technical field [0001] The invention belongs to the technical field of denitrification of sewage and wastewater, and particularly relates to a double-filler denitrification biological method and an application device for reducing nitrous oxide discharge. Background technique [0002] The use of microorganisms to remove nitrogen from sewage is the most economical method of sewage nitrogen removal. Therefore, biological nitrogen removal technology has always attracted attention and is an important research field. At present, urban sewage and industrial wastewater treatment plants or treatment facilities have been built, and the heterotrophic denitrification biological denitrification process with anoxic section is generally used. The C / N (carbon to nitrogen ratio) value that needs to be provided in these denitrification processes is about 4~5:1. To remove the corresponding nitrate, the water needs to contain an appropriate amount of biodegradable organic matter. Therefore, in ...

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Problems solved by technology

At present, in the anoxic system, if it can be optimized and enriched, it still has a strong N at a lower C / N value, higher nitrate or nitrite 2 The denitrifying bacteria group with O reduction and decomposition ability can not only reduce the N in the denitrification process 2 O emission can also improve the reaction efficiency, effectively reduce the reflux ratio of the mixed liquid, and achieve energy saving. However, at present, when improving the denitrification process of sewage plants, more muddy water mixing and water inlet methods are often used, which often require greater energy consumption. Less optimization of microbial flora species, in the case of low C / N value, can not effectively reduce the amount of greenhouse gas production

[0005] In view of the low C / N value in the operation of typical denitrification processes, the method of adding external carbon sources is mainly used to make up for it. Although the purpose of denitrification can be achieved, there are large consumption of carbon sources, low utilization rate, and sludge There are many problems such as large output, high operating costs, which is not conducive to energy saving and emission reduction, and when the concentration of nitrate or nitrite in the influent water is high, normal denitrification cannot be performed during high-load operation, and there is a large return during low-load operation. Flow intensifies power cost input, N 2 O The overflow ratio is large, and the operating cost is high

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