Small-scale landfill leachate full-quantitative emergency treatment method and system

Abstract

The invention relates to a small-scale landfill leachate full-quantitative emergency treatment method and system. The method comprises the steps that: landfill leachate sequentially passes through a lime reaction tank, a pretreatment container reaction tank, an inclined tube sedimentation tank, a PCF filter and a security filter; the pretreated landfill leachate enters a high-pressure reverse osmosis system, then clear liquid passing through the high-pressure reverse osmosis system enters an ion exchange system, ammonia nitrogen is removed, the landfill leachate is discharged after reaching the standard, and concentrated liquid passing through the high-pressure reverse osmosis system enters the next step; a membrane concentrated solution generated by the primary decrement system is fed into a forward osmosis system to further concentrate the membrane concentrated solution to obtain a super-concentrated solution, a clear solution is discharged after the clear solution reaches the standard to obtain a super-concentrated solution, and the super-concentrated solution enters a curing system; and the hyperconcentrated solution passing through the forward osmosis system is mixed with a curing agent, a pH regulating material and cement, and then the mixture is sprayed back to a refuse landfill through an injection machine. The landfill leachate full-quantitative treatment process solves the problem that zero emission is not achieved in landfill leachate treatment, and is convenient to operate and thorough in treatment.

Description

technical field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method and system for fully quantitative emergency treatment of small-scale landfill leachate. Background technique

[0002] The leachate produced by domestic waste is a high-concentration wastewater with complex components, which has the characteristics of high hardness, high salt content, high heavy metal content, high concentration of organic pollutants, high ammonia nitrogen / total nitrogen content, and poor biodegradability. The discharge standard of landfill leachate is very strict. The Ministry of Environmental Protection of the People's Republic of China issued and implemented the newly revised implementation standard "Pollutant Control Standards for Domestic Waste Landfill Sites" (GB16889-2008) for the treatment of landfill leachate in 2008, using a single Physicochemical or biochemical processes cannot meet the requirements of emission stan...

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