A system and method for the reduction and recycling of landfill leachate membrane concentrate

Abstract

The invention discloses a landfill leachate film concentrate reduction and resource recovery treatment system and method. The treatment system includes a submerged combustion evaporation device, an industrial salt production device, a miscellaneous salt resource recovery device, and a waste residue processing device; The extraction device includes a forced circulation evaporation crystallizer for producing industrial salt KCl and NaCl with saturated membrane concentrate, and an industrial salt NaNO with the mother liquor from the forced circulation evaporation crystallizer. 3 、Na 2 SO 4 The flash cooling crystallizer and sodium sulfate evaporator, the miscellaneous salt resource recovery device includes a reaction kettle, and concentrated sulfuric acid is added to the reaction kettle, and the miscellaneous salt produced after the production of industrial salt enters the reaction kettle to react to produce NaHSO 4 , HCl, and the reacted waste salt enters the waste residue treatment device to be solidified and landfilled. The treatment system realizes the separation of industrial salt while immersing, burning, evaporating and reducing the membrane concentrate, reduces the circulation of salt in the environment and makes it a resource, and further improves the economy and environmental protection of landfill leachate membrane concentrate treatment. .

Description

technical field [0001] The invention relates to a system and method for the reduction and recycling of landfill leachate membrane concentrate, and belongs to the technical field of organic high-salt waste liquid treatment. Background technique [0002] At present, the main treatment methods for landfill leachate membrane concentrate are: recharge method, advanced oxidation method, incineration method, etc. Although the recharge method has the advantages of low cost and simple operation, the salinity and The continuous accumulation of refractory substances makes the high-salt leachate enter the treatment system again in the subsequent treatment process, resulting in an increase in osmotic pressure and a reduction in the life of the membrane; the advanced oxidation method is flexible in technology selection, but the treatment cost is high, and the treatment effect is difficult to meet the efflux standard; The content of calcium and magnesium ions in the membrane concentrate is...

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: In view of the unsatisfactory effect of traditional treatment methods for membrane concentrates in the prior art, and the reduction and insufficient resource utilization in the simultaneous immersion evaporation process, the present invention provides a reduction and resource utilization of landfill leachate membrane concentrates. treatment system, and provide a method for using the system to reduce the amount of membrane concentrate and recycle it

Images