Device and method for deeply denitrifying landfill leachate through two-stage shortcut nitrification-anaerobic ammonia oxidation based on segmented drainage

Abstract

The invention discloses a device and a method for deeply denitrifying landfill leachate through two-stage short-cut nitrification-anaerobic ammonia oxidation based on segmented drainage, and belongs to the technical field of biological denitrification of wastewater with low carbon-nitrogen ratio and high ammonia nitrogen content. The method comprises the following steps of: feeding of water into a short-cut nitrification SBR, anoxic stirring in the short-cut nitrification SBR, first precipitation and drainage in the short-cut nitrification SBR, aerobic aeration in the short-cut nitrification SBR, second precipitation and drainage in the short-cut nitrification SBR, feeding of water into an anaerobic ammonia oxidation SBR, anoxic stirring in the anaerobic ammonia oxidation SBR, and precipitation and drainage in the anaerobic ammonia oxidation SBR. The device and the method are suitable for deep denitrification treatment of landfill leachate generated by waste sorting based on short-cut nitrification and anaerobic ammonia oxidation. The process is advanced. The device structure is simple. The advantages of energy conservation and consumption reduction are obvious. The operation is simple and convenient. The problem that the matrix proportion in the deep denitrification process based on anaerobic ammonia oxidation is not coordinated is solved.

Description

technical field [0001] The invention relates to a two-stage short-range nitrification-ANAMMOX device and method for deep denitrification of landfill leachate based on segmented drainage, belongs to the technical field of biological denitrification of waste water with low carbon-to-nitrogen ratio and high ammonia-nitrogen, and is suitable for garbage classification The biological denitrification process of high ammonia nitrogen wastewater such as landfill leachate. Background technique [0002] In recent years, on the one hand, many new landfills built in the 1990s and many waste incineration plants built in this century will produce a large amount of landfill leachate every day; on the other hand, with the continuous improvement of people's living standards, municipal solid waste With the continuous increase of production, although the trend of garbage classification is gradually rising, the garbage classification and disposal will not reduce the moisture contained in the ga...

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Problems solved by technology

However, the above two methods have defects. In the first method, it is difficult to control the reaction process of partial short-range nitrification, and the suitable NH in the reactor 4 + -N and NO 2 - The ratio of -N is not easy to precisely control to meet the requirements of the anammox reaction

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