System and method for treating high-concentration landfill leachate in aerobic composting site

Abstract

The invention discloses a system and a method for treating the high-concentration landfill leachate in an aerobic composting site. The system comprises a hydraulic screen, a regulation pool, an anoxic and anaerobic pool, an upflow anaerobic pool, an anoxic pool, a first aerobic pool, a second aerobic pool, a secondary sedimentation pools, an immobilized microorganism aerating biological filtering pool, an MBR (membrane biological reaction) pool, a nanofiltration system, a decolourising pool and a charcoal canister which are connected in sequence. The raw landfill leachate is treated by the hydraulic screen, the regulation pool, the anoxic and anaerobic pool, the upflow anaerobic pool, the anoxic pool, the first aerobic pool, the second aerobic pool, the secondary sedimentation pools, the immobilized microorganism aerating biological filtering pool, the MBR pool, the nanofiltration system, the decolourising pool and the charcoal canister of the system in sequence so that the effluent can be recovered. The effluent can meet the requirement for the limit of the discharge concentration of the water pollutant in the special region in the Domestic Waste Landfill Site Pollution Control Standard GB16889-2008.

Description

technical field [0001] The invention relates to waste water treatment, in particular to a method and system for treating landfill leachate in an aerobic composting field. Background technique [0002] With the continuous improvement of my country's urban living standards, the amount of domestic waste is also increasing. my country has built a number of domestic waste treatment plants. The treatment methods mainly include waste incineration, landfill, composting and comprehensive utilization. The leachate produced is At present, it is recognized in the world that it is seriously polluted, difficult to treat, and high-concentration polluting waste with complex properties. Landfill leachate is a kind of high-concentration organic wastewater. Its water quality and quantity are affected by many factors such as garbage types, local environment and precipitation. Changes are relatively large. Big. Landfill leachate contains a variety of pollutants, including high concentrations of o...

AI Technical Summary

Problems solved by technology

[0006] In the above process (1), the ammonia stripping process reduces the ammonium ions in the leachate, which greatly reduces the inhibition of ammonium ions on biochemistry in the subsequent treatment process, but it also brings a series of problems: the stripping tower is easy to scale , Blowing off ammonia gas will cause secondary pollution

The accumulation of ammonia nitrogen and salt will lead to a decline in the treatment effect of aerobic composting, and the high concentration of ammonia nitrogen and salt leachate will react on the treatment system, not only the treatment effect will decrease, but also the operating cost will be increased.

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