Landfill power plant leachate treatment system

Abstract

The invention discloses a landfill power plant leachate treatment system which adopts a biochemical and membrane filtration combined process; nanofiltration concentrate and reverse osmosis concentratecan be obtained by treatment processes such as a regulating tank, a UASB tank, a nitrification tank, a denitrification tank, ultrafiltration, nanofiltration and reverse osmosis; humic acid is extracted from the nanofiltration concentrate through a material membrane separation system; the reverse osmosis concentrate is softened by a TUF tubular softening membrane to obtain permeate, the permeate passes through a DTRO device for reverse osmosis treatment to obtain a concentrated liquid, the concentrated liquid is crystallized by MVR evaporation, finally a small amount of the concentrated liquidis sprayed back to a boiler, and DTRO permeate is treated by a brackish water desalination reverse osmosis membrane unit to be discharged up to the standard or reused. The landfill power plant leachate treatment system has high recovery rate and can achieve zero discharge of the concentrated liquid.

Description

technical field [0001] The invention relates to the technical field of environmental protection power generation, in particular to a leachate treatment system of a garbage power plant. Background technique [0002] In recent years, waste incineration power generation treatment technology has gradually become the main means of domestic waste treatment. With the improvement of environmental protection requirements, the environmental protection department has stricter control on the sewage / wastewater discharge indicators of waste incineration power plants. Therefore, rational use of sewage / waste water in waste-to-energy plants, improvement of water efficiency in power plants, and zero discharge of waste water / waste water from waste-to-energy plants can not only reduce the pressure on the environment of waste-to-energy plants, but also reduce the operating costs of power plants. [0003] At present, in order to meet strict environmental protection requirements, the landfill lea...

AI Technical Summary

Problems solved by technology

However, the salt content and chlorine content of the permeate after DTRO treatment are generally high, which cannot meet the standard of reuse water (recirculating cooling water replenishment)

Moreover, although the evaporation treatment process adopted by the membrane concentrate can reduce the amount by more than 90%, there is still a small amount of concentrate produced

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