Partial-nitrification-and-anaerobic-ammonia-oxidation-combined denitrification method and device for synchronously treating urban sewage and mature landfill leachate

Abstract

The invention discloses a partial-nitrification-and-anaerobic-ammonia-oxidation-combined denitrification method and device for synchronously treating urban sewage and mature landfill leachate. The device comprises a raw urban sewage tank, a raw mature landfill leachate tank, a middle water tank, a denitrification half partial nitrification reactor, a secondary sedimentation tank and a closed anaerobic-ammonia-oxidation biological trickling filter reactor. The secondary sedimentation tank is provided with a water outlet pipe, a returned sludge pipe and a left sludge pipe. The method includes the steps that the urban sewage and the mature landfill leachate are mixed in proportion to enter the middle water tank and then enter an anoxic region of the denitrification half partial nitrification reactor to be subjected to denitrification, and returned nitrate nitrogen is removed through organisms in the sewage; then the mixture enters an aerobic region to be subjected to half partial nitrification; then the mixture enters the closed anaerobic-ammonia-oxidation biological trickling filter reactor to be subjected to an anaerobic ammonia oxidation reaction. According to the method and device, combined treatment is carried out on the sewage generated by mixing the urban sewage and the mature landfill leachate through the partial-nitrification-and-anaerobic-ammonia-oxidation-combined technology, the joint denitrification aim is achieved, and the method and device are economical and easy to execute.

Description

technical field [0001] The invention relates to a short-range nitrification combined with anaerobic ammonium oxidation synchronously treating urban sewage and late garbage leachate denitrification method and device, belonging to the technical field of biological treatment of sewage with low carbon-to-nitrogen ratio and high ammonia-nitrogen. Background technique [0002] With the development of our country's economy and the increase of urban population, our country's demand for clean water is also increasing. The problem of water pollution control has become a top priority in my country and the world. Urban domestic sewage is an important source of water pollution. After primary physical treatment and secondary biochemical treatment, TN and TP are still high, and direct discharge into water will cause water pollution. Eutrophication causes disasters such as red tides and algal blooms. At the same time, people's material living standards continue to improve, and the urban sol...

AI Technical Summary

Problems solved by technology

In the traditional sewage biological denitrification process, the nitrification reaction requires artificial aeration, and the denitrification reaction requires the addition of carbon sources, which results in a large energy consumption

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