Method for treating landfill leachate nanofiltration concentrated solution through iron-carbon micro-electrolysis synergistic with microwave

Abstract

The invention discloses a method for treating a landfill leachate nanofiltration concentrated solution through iron-carbon micro-electrolysis synergistic with microwave. The method for treating the landfill leachate nanofiltration concentrated solution through the iron-carbon micro-electrolysis synergistic with microwave comprises the processes of water quality regulation, iron-carbon micro-electrolysis reaction, microbubble air floatation reaction, microwave reaction and pH regulation and further comprises a sludge dehydration process. The method for treating the landfill leachate nanofiltration concentrated solution through the iron-carbon micro-electrolysis synergistic with microwave has the advantages that an iron-carbon micro-electrolysis and microwave synergistic oxidation treatment process is adopted, a 'biochemical method+NF' process is used for treating a nanofiltration concentrated solution produced from landfill leachate (hereinafter referred to as a 'concentrated solution'), treatment effect is good, biochemicalization property of the concentrated solution is improved, the problem of difficulty in treatment of the concentration solution is solved, the defects of an existing landfill leachate 'biochemical method+NF' treatment process are overcome, a landfill leachate treatment technology is improved, and healthy and sustainable development of the environmental protection industry is promoted.

Description

technical field [0001] The invention relates to the technical field of landfill leachate treatment, in particular to a method for iron-carbon micro-electrolysis and microwave treatment of landfill leachate nanofiltration concentrate. Background technique [0002] At present, the most commonly used and most effective standard discharge treatment for landfill leachate is the "biochemical method (SBR / MBR) + membrane treatment (NF / RO)" process. However, this process produces about 20-25% of landfill leachate membrane filtration concentrate in the process of treatment. The concentrate contains a large amount of aromatic compounds, chlorinated aromatic compounds, phosphate esters, phenols, and aniline pollutants that are difficult to biodegrade, and also contains a variety of endocrine disruptor substances, with complex components, high concentrations of pollutants, and high salt content , and has certain biological toxicity, poor biodegradability, black opaque suspension, belong...

AI Technical Summary

Problems solved by technology

This method has the following problems in application: (1) The concentration of leachate pollutants is getting higher and higher, which increases the difficulty of treatment in the biochemical system; (2) The concentrated solution has a high salt content, the reverse osmosis membrane is easily blocked, and the membrane flux decreases Soon, the consumables will be replaced frequently, and the operating cost will increase; (3) If it is not handled properly, it will easily cause secondary pollution

If the landfill leachate is directly discharged into the environment, it will cause serious pollution to surface water and groundwater, and at the same time seriously threaten the safety of drinking water for residents.

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