A treatment process for leachate of a waste incineration power plant

Abstract

The invention discloses a leachate treatment process of a garbage incineration power plant, including mixing adjustment, compound precipitation, water quality balance, biodegradation, solid-liquid separation, nanofiltration and reverse osmosis and other treatment processes. The first water quality balance pool and the second water quality balance pool can speed up the treatment of leachate. The garbage pit seepage filtrate pool is equipped with a spare pipeline connected to the composite sedimentation tank. When the water is sufficient and the COD concentration of the leachate is low, the garbage can be directly discharged The leachate from the pit leachate tank is introduced into the composite sedimentation tank for precipitation, which can save the construction space of the leachate adjustment tank and reduce the construction cost. While the leachate is treated continuously, the water quality fluctuation is small, which plays a stable role in the operation of the whole treatment process. The COD concentration can be adjusted without adding an anaerobic reaction tank, which reduces construction and operation costs. There is no odor and raw biogas discharge, and it is green Environmental friendly.

Description

technical field [0001] The invention relates to a high-concentration organic leachate treatment process, in particular to a leachate treatment process for waste incineration power plants. Background technique [0002] With the improvement of people's living standards and the concentration of population, the amount of domestic waste is increasing year by year, and people's requirements for the environment are also getting higher and higher. Garbage siege is an urgent problem to be solved by the country and the government, making waste incineration power plants Construction has also become a trend. Among them, the leachate generated by garbage needs to be treated by a leachate treatment plant. Due to several characteristics of the landfill leachate: ① high COD and ammonia nitrogen concentrations in the leachate, ② high content of heavy metal ions and salt, ③ PH Low acidity, ④ Seasonal changes in the amount of leachate, all determine the difficulty of leachate and domestic sewa...

AI Technical Summary

Problems solved by technology

[0002] With the improvement of people's living standards and the concentration of population, the amount of domestic waste is increasing year by year, and people's requirements for the environment are also getting higher and higher. Garbage siege is an urgent problem to be solved by the country and the government, making waste incineration power plants Construction has also become a trend. Among them, the leachate generated by garbage needs to be treated by a leachate treatment plant. Due to several characteristics of the landfill leachate: ① high COD and ammonia nitrogen concentrations in the leachate, ② high content of heavy metal ions and salt, ③ PH Low acidity, ④ Seasonal changes in the amount of leachate, all determine the difficulty of leachate and domestic sewage treatment. Currently, the methods used in leachate treatment plants are generally leachate, anaerobic, aerobic, and membrane treatment. The biochemical treatment process generally adopts an anaerobic-aerobic combined process. Among them, the main function of the anaerobic reactor is to reduce the COD concentration and reduce the load of aerobic treatment, but the anaerobic reactor will produce odor and Generate biogas, which has a great impact on the environment and will cause damage to the subsequent filter membrane

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