Landfill leachate membrane concentrated solution treatment process

Abstract

The invention belongs to the technical field of sewage treatment in the environmental protection industry, and particularly relates to a landfill leachate membrane concentrated solution treatment process which comprises the following steps: S1, adding an adsorbing material, S2, adding an organic solvent to recover the adsorbing material, S3, evaporating and recovering, and S4, treating refractoryorganic matters. According to the method, the landfill leachate membrane concentrated solution is adsorbed by adsorption resin and then is treated by a biochemical treatment process to be discharged after reaching the standard; the adsorption saturated adsorbing material is desorbedthrough theorganic solvent, so that the recycling of the adsorbingmaterial is ensured; desorbedrefractory organic matters and the organic solvent are separated through an evaporation process, the organic solvent is recycled, the refractory organic mattersare taken as raw materials of a product takinghumic acid as araw material or is sprayed back to an incinerator to be treated, and resource utilization is achieved. According to the invention, the treatment problem of leachate membrane concentrated solution withcomplex composition is solved, and the total treatment and resource utilization maximization of the concentrated solution are fundamentally realized.

Description

technical field

[0001] The invention belongs to the technical field of sewage treatment in the environmental protection industry, and in particular relates to a process for treating landfill leachate membrane concentrate. Background technique

[0002] The leachate produced during the landfill and incineration of garbage is a kind of high-concentration and difficult-to-treat organic wastewater with large changes in water quality and quantity, high ammonia nitrogen content, and complex components. With the improvement of national environmental protection requirements, leachate treatment effluent requirements meet the requirements of the "Standards for Pollution Control of Domestic Waste Landfill Sites" (GB16889-2008). The traditional advanced treatment adopts the combined technology of nanofiltration and reverse osmosis. However, after the advanced treatment of landfill leachate by nanofiltration and reverse osmosis system, a large amount of membrane concentrate will be produc...

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