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Landfill leachate concentrated liquor membrane zero-emission treatment technology and integrated device

A technology of landfill leachate and membrane method, which is applied in the direction of contaminated groundwater/leachate treatment, multi-stage water treatment, water/sewage treatment, etc. It can solve problems such as equipment shutdown, lower furnace temperature, and grate corrosion, and achieve Improve energy utilization, reduce operating pressure, and achieve a high degree of automation

Pending Publication Date: 2019-03-01
XIAMEN TQX MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, the mainstream treatment process for waste incineration power plants is to spray back the concentrated liquid into the furnace for incineration. However, this method can only treat part of the concentrated liquid, and spraying back to the furnace for incineration will lead to serious corrosion of the grate , Dust collector clogging, tapered mouth fouling, etc., resulting in the frequent shutdown of the equipment, and the use of this treatment method will also reduce the furnace temperature, which is very unfavorable to the normal operation of the equipment
The second is that the mainstream treatment process for the landfill leachate concentrate is to recharge it to the garbage dump, which will increase the salt content of the leachate, increase the load on the treatment system or even collapse

Method used

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  • Landfill leachate concentrated liquor membrane zero-emission treatment technology and integrated device
  • Landfill leachate concentrated liquor membrane zero-emission treatment technology and integrated device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Such as figure 1 As shown, the landfill leachate dope (pH value is 6.5, permanent hardness is 2500mg / L, conductivity is 50ms / cm, COD value is 5000mg / L) introduces MMS unit 1 (wherein, the pore size of reverse osmosis membrane element 12 is 80Da, the pore size of the nanofiltration membrane element 13 is 100Da) at a temperature of 35°C and a pressure of 25bar to separate the hardness ions and suspended matter to obtain a dope rich in hardness ions and suspended matter and a solution poor in hardness ions and suspended matter The clear solution of the substance, wherein, the permanent hardness of the concentrated solution is 8000mg / L and the COD value is 50000mg / L, the permanent hardness of the clear solution is 800mg / L and the COD value is 600mg / L; the clear solution derived from the MMS unit 1 The liquid is introduced into the electrodialysis desalination unit 2 to perform electrodialysis desalination treatment at a temperature of 35°C and a pressure of 1 bar to obtain ...

Embodiment 2

[0072] Such as figure 1As shown, the landfill leachate dope (pH value is 6.5, permanent hardness is 2500mg / L, conductivity is 50ms / cm, COD value is 5000mg / L) introduces MMS unit 1 (wherein, the pore size of reverse osmosis membrane element 12 is 100Da, the nanofiltration membrane element 13 has a pore size of 200Da) at a temperature of 5°C and a pressure of 15bar to separate hardness ions and suspended matter to obtain a dope rich in hardness ions and suspended matter and a solution poor in hardness ions and suspended matter The clear solution of the substance, wherein, the permanent hardness of the concentrated solution is 5000mg / L and the COD value is 20000mg / L, the permanent hardness of the clear solution is 1000mg / L and the COD value is 1000mg / L; the clear solution derived from the MMS unit 1 The liquid is introduced into the electrodialysis desalination unit 2 to perform electrodialysis desalination treatment at a temperature of 5°C and a pressure of 0.5 bar to obtain sal...

Embodiment 3

[0074] Such as figure 1 As shown, the landfill leachate dope (pH value is 7, permanent hardness is 2000mg / L, electrical conductivity is 50ms / cm, and COD value is 3000mg / L) introduces MMS unit 1 (wherein, the aperture of reverse osmosis membrane element 12 is 90Da, the pore diameter of the nanofiltration membrane element 13 is 150Da) at a temperature of 20°C and a pressure of 20bar to separate the hardness ions and suspended matter to obtain a dope rich in hardness ions and suspended matter and a solution poor in hardness ions and suspended matter The clear solution of the substance, wherein, the permanent hardness of the concentrated solution is 6500mg / L and the COD value is 35000mg / L, the permanent hardness of the clear solution is 500mg / L and the COD value is 500mg / L; the clear solution derived from the MMS unit 1 The liquid is introduced into the electrodialysis desalination unit 2 to carry out electrodialysis desalination treatment at a temperature of 40° C. and a pressure...

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Abstract

The invention belongs to the field of landfill leachate concentrated liquor treatment, and particularly discloses a landfill leachate concentrated liquor membrane zero-emission device and method. Thelandfill leachate concentrated liquor membrane zero-emission method comprises the steps 1, hardness ions and suspended solids are separated from landfill leachate concentrated liquor, and concentratedliquor rich in hardness ions and suspended solids and clear liquor containing few hardness ions and few suspended solids are obtained; 2, the clear liquor is subjected to electroosmosis desalination,and concentrated water rich in salt and fresh water containing little salt are obtained; 3, the fresh water is subjected to reverse osmosis, concentrated liquor and dialysis liquor are obtained, theconcentrated liquor returns back to the step 1, and the dialysis liquor is reused as recycled water; 4, water in the concentrated liquor from the step 1 and water in the concentrated liquor from the step 2 are removed to obtain solid abraum salt. By means of the device and the method, it can be achieved that the landfill leachate concentrated liquor is treated into the recycled water which can bereused and solid wastes, the zero-emission aim is achieved, and the running pressure of an incinerator is reduced.

Description

technical field [0001] The invention belongs to the field of landfill leachate concentrate treatment, and in particular relates to equipment and a method for zero discharge of landfill leachate concentrate membrane method. Background technique [0002] Landfill leachate is a kind of wastewater with complex composition, high concentration and difficult treatment. At present, the main treatment technology is to use the combination of biochemical and membrane methods to treat it. Among them, the biochemical method can remove most of the organic matter in landfill leachate, effectively reduce the COD value, ammonia nitrogen content, etc.; After membrane separation such as ultrafiltration, nanofiltration or reverse osmosis, the remaining organic matter, salt and other substances are further filtered, so that the treated wastewater can meet the discharge standard. The membrane separation process will produce a total volume of 20-30% of the landfill leachate concentrate, which is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/06
CPCC02F9/00C02F2301/08C02F2103/06C02F1/442C02F1/441C02F1/444C02F1/4693C02F1/04Y02A20/131
Inventor 吴洪溪刘巍温根义冯淦然汤筱雯
Owner XIAMEN TQX MEMBRANE TECH