Technology for removing total nitrogen in garbage leachate by anammox and special device thereof

Abstract

A technology for removing total nitrogen in garbage leachate by anammox and a special device thereof are disclosed. The technology comprises the following steps: low dissolved oxygen concentration is strictly controlled in the nitration stage to oxidize ammonia nitrogen into nitrite nitrogen; in the denitrification stage, nitrite nitrogen is converted into nitrogen to escape so as to reduce total nitrogen in garbage leachate; then, an effluent undergoes mud-water separation, and wastewater is fully mixed with a few amount of garbage leachate stock solution in order to control the ratio of ammonia nitrogen to nitrite nitrogen in the wastewater and contents; simultaneously, nitrogen or carbon dioxide is supplemented in order to reduce dissolved oxygen in water and then provide favorable flow condition and strict anaerobic condition for follow-up anammox; and finally, a hydrophilic biological stuffing with large specific surface area is arranged in the anammox reactor to provide a stable growth environment for anammox bacteria so as to smoothly carry out anammox denitrification reaction. Therefore, total nitrogen of late landfill leachate reaches the emission standard, and energy is saved and consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of biological denitrification of waste water with low carbon-to-nitrogen ratio and high ammonia-nitrogen, and specifically relates to a process and a special device for removing total nitrogen in landfill leachate by anaerobic ammonium oxidation, and is especially suitable for high-efficiency denitrification of late-stage landfill leachate deal with. Background technique [0002] In recent years, with the continuous increase of urban waste production, landfill has gradually become the most widely used method of waste treatment and disposal at home and abroad. Landfill leachate has complex components, large changes in water quality and quantity, high concentrations of ammonia nitrogen and organic matter, and imbalanced ratios of microbial nutrients, making it difficult to treat. At present, the denitrification treatment of landfill leachate mainly adopts the traditional nitrification and denitrification deni...

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Problems solved by technology

[0009] The purpose of the present invention is to provide anaerobic ammonium oxidation for the technical problems such as the ratio and content of influent ammonia nitrogen and nitrite nitrogen are unstable, the reaction system is unstable, and the influent contains dissolved oxygen in the above-mentioned existing anaerobic ammonium oxidation process. The process and special device for removing total nitrogen in landfill leachate can greatly improve the denitrification efficiency and discharge the total nitrogen in landfill leachate up to the standard

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