Advanced landfill leachate anaerobic ammonia oxidation deep denitrification device and method based on kitchen waste digestive juice as external carbon source

Abstract

The invention discloses a device and a method for advanced denitrification of advanced landfill leachate by anaerobic ammonia oxidation based on kitchen waste digestive juice as an external carbon source, and belongs to the technical field of biological denitrification of high-ammonia-nitrogen wastewater. The advanced landfill leachate firstly enters a synchronous short-cut nitrification-denitrification coupled anaerobic ammonia oxidation reactor, the reactor operates in a mode of oxygen deficit 1.5 h/micro-aerobic aeration 21.5 h, the oxygen deficit section utilizes sufficient organic matters in raw water to remove nitrite nitrogen and nitrate nitrogen remaining in the last period, and the aerobic section synergistically realizes short-cut nitrification-anaerobic ammonia oxidation and denitrification; and pumping the discharged water into a short-cut denitrification-anaerobic ammonia oxidation reactor, adding a kitchen waste digestive fluid at the same time, and operating the reactor in an anoxic manner to realize high-efficiency nitrogen removal. According to the method, the kitchen waste digestive juice which is good in biodegradability and low in price is used as an external carbon source, the treatment cost is remarkably reduced, the method is suitable for combined treatment of the landfill leachate and the kitchen waste digestive juice which are generated under the large situation of garbage classification, and the purpose of treating waste with waste is achieved.

Description

technical field [0001] The invention relates to a late-stage landfill leachate anaerobic ammonia oxidation deep denitrification device and method based on kitchen waste digestion liquid as an external carbon source, belonging to the technical field of biological denitrification of high-ammonia-nitrogen wastewater, and is suitable for high-ammonia nitrogen generated by garbage classification treatment Wastewater biological denitrification process. Background technique [0002] With the development of my country's national economy, the expansion of urban scale and the improvement of residents' living standards, the output of urban domestic waste in my country is increasing day by day. In the process of collection, transportation, storage, and disposal of domestic waste, a high-ammonia-nitrogen wastewater with complex pollutant components, namely landfill leachate, will be formed, which seriously threatens the soil, water environment and human health. Except for kitchen waste,...

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Problems solved by technology

However, the very small amount of degradable organic matter in late-stage landfill leachate is often not enough to provide a sufficient amount of nitrite nitrogen accumulation, which makes anaerobic ammonium oxidation lack of driving force, and it is difficult for the combined process to exert a good denitrification effect

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