Reduction treatment process for landfill leachate concentrate

Abstract

The invention discloses a reduction treatment process for landfill leachate concentrate. Effluent of the landfill leachate treated by an MBR system enters a first dosing system so that metal ions areremoved, then the effluent enters an MCR system for a membrane chemical reaction, produced water of the MCR system enters a second dosing system to adjust the pH value, effluent of the second dosing system enters an NF membrane system to be treated, concentrated water generated by the NF membrane system enters a material separation membrane system to be concentrated, produced water of the NF membrane system and produced water of the material separation membrane system enter a RO membrane system to be treated, water produced by the RO membrane system is discharged after reaching the standards,concentrated water produced by the material separation membrane system and the RO membrane system enters an EDR system to be treated, water produced by the EDR system is discharged after reaching thestandards, and a concentrated solution produced by the EDR system is subjected to incineration treatment. According to the treatment process provided by the invention, the reduction of the landfill leachate concentrated solution can be realized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a process for reducing the amount of landfill leachate concentrate. Background technique [0002] The concentrated liquid of landfill leachate has complex components, containing a large amount of humic complexes, aromatic compounds, halogenated hydrocarbons, heavy metals, inorganic salts, etc. It is difficult to treat this type of wastewater, and if it is not disposed of properly, it will definitely bring great harm to the surrounding environment. hazards, and the removal of refractory organic matter is the key to the treatment of leachate concentrate. At present, the commonly used leachate concentrate treatment methods include recharge method, evaporation solidification method, coagulation method and advanced oxidation method. The recharge method is low in cost and can accelerate the stabilization of landfill waste, but its internal environment is not conducive to the ...

AI Technical Summary

Problems solved by technology

The recharge method is low in cost and can accelerate the stabilization of landfill waste, but its internal environment is not conducive to the removal of refractory organic matter and salt, resulting in the accumulation of organic pollutants in the leachate after recharge; the evaporation solidification method can take into account the concentration of leachate The removal of various pollutants in the liquid, but there is the problem of secondary concentrated liquid accumulation; the coagulation method has a good treatment effect and is more economical, but it will produce a large amount of organic-inorganic composite sludge; the advanced oxidation method is harmful to the outside world Low impact, no secondary pollution, high biodegradability, but it is difficult to stably treat the concentrate, stable and continuous effluent to reach the standard discharge range, high operating costs, Fenton oxidation will produce a large amount of iron salt flocculation sludge, while ozone oxidation Medium ozone utilization rate and degradation effect are slightly weaker and need to be further improved

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