A/O semi-short-cut nitrification and uasb anaerobic ammonium oxidation combined denitrification device and method for late landfill leachate

Abstract

The inventions discloses a later-period landfill leachate A / O (anoxic / oxic) half short-cut nitrification and UASB (upflow anaerobic sludge blanket) anaerobic ammonia oxidation combined nitrogen removal device and method, and belongs to the technical field of biological nitrogen removal of high ammonia-nitrogen landfill leachate with a low C / N (carbon / nitrogen) ratio. A raw water tank is communicated with a first grid chamber in an anoxic zone of an A / O half short-cut nitrification reactor, a central tube and an overflow dam are arranged in a settling pond, the settling pond is connected with the A / O half short-cut nitrification reactor, water discharged from the upper part of the settling pond is connected with a middle water tank through a water discharge pipe, the middle water tank is connected with the bottom of an anaerobic ammonia oxidation reactor, and the anaerobic ammonia oxidation reactor is provided with a self-circulation pipe and connected with an A / O raw water tank; the A / O half short-cut nitrification reactor is connected in series with an anaerobic ammonia oxidation UASB reactor for operation, and a later-period landfill leachate stock solution is diluted through circulation of water discharged from the anaerobic ammonia oxidation UASB reactor. The device and the method are used for organic matter removal and short-cut nitrification of later-period landfill leachate of a refuse landfill, the technology is advanced, the device is simple in structure, and the energy conservation and cost reduction advantages are remarkable.

Description

technical field [0001] The invention belongs to the technical field of biological denitrification of waste water with low carbon-to-nitrogen (C / N) ratio and high concentration ammonia nitrogen, and specifically relates to a semi-short-range nitrification reaction of landfill landfill leachate through dynamic control, and then without the presence of organic carbon sources. Under certain conditions, the nitrogen in the leachate is removed by the anaerobic ammonium oxidation reaction to complete the autotrophic biological denitrification, which is suitable for the biological denitrification of low C / N ratio high ammonia nitrogen wastewater such as late landfill leachate. Background technique [0002] Sanitary landfill is accepted as a solid waste disposal method due to its economical and environmental friendliness and is widely used all over the world. However, landfill leachate produced by rainwater infiltration and water vapor from landfill sites has caused serious harm to t...

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Problems solved by technology

Although the biological method is economical and energy-saving, there are many inhibitory factors. Although the physical and chemical method is mature and stable, it is expensive and the follow-up treatment is relatively cumbersome. The effective treatment of this type of wastewater is one of the difficulties in the field of environmental engineering at home and abroad. The developed Landfill leachate treatment technology with practical promotion value has extremely important value

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