A kind of treatment method of industrial waste landfill leachate

Abstract

The invention discloses a treatment method of industrial refuse landfill percolate. The method comprises aeration treatment, coagulating sedimentation, advanced oxidation treatment, alkalifying treatment, microfiltration and reverse osmosis membrane filter of the industrial refuse landfill percolate. The treatment method aims at the characteristics that CODcr and B / C values of the industrial refuse landfill percolate are low, content of heavy metal ions is high and concentrations of calcium, magnesium and silicon are high, aeration treatment, coagulating sedimentation, UV / O3 combination advanced oxidation, microfiltration and reverse osmosis treatment are reasonably combined, and the industrial refuse landfill percolate can be effectively treated so that treated yielding water achieves emission standard. The treatment method is simple in process, good in stability, strong in practicability and good in treatment effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method for leachate of industrial waste landfills. Background technique [0002] Sanitary landfill is the main way to dispose of garbage in my country. During the landfill process, a variety of metabolites and water will be produced due to fermentation, decomposition of organic matter, rainwater flushing, and groundwater immersion, forming landfill leachate. Landfill leachate is a kind of organic wastewater with high concentration of pollutants, complex composition and extremely unstable changes, which will cause serious secondary pollution to the surrounding environment and endanger human health. Landfill leachate contains a large amount of organic matter, nitrogen and phosphorus substances, and a wide variety of heavy metals with excessive content, among which COD Cr 、BOD 5 , heavy metals, ammonia nitrogen and salt content are all high, and the treatment ...

AI Technical Summary

Problems solved by technology

[0009] (2) High content of heavy metal ions

[0011] (3) High concentrations of calcium, magnesium, silicon, etc.

[0012] Industrial waste landfill leachate contains high hardness, usually Ca 2+ Concentration above 2500mg / L, Mg 2+ Concentration above 300mg / L, Si 2+ If the concentration is above 100mg / L, due to the high hardness in the leachate, scaling will often occur in the front-end pipeline of the treatment system, the flow rate will become smaller, and the pipeline will eventually be blocked and cannot be used

[0013] Most of the existing treatment processes and technologies are aimed at the leachate of domestic waste landfills. It is difficult to achieve satisfactory results if the leachate treatment process of domestic waste landfills is simply applied to the leachate of industrial waste landfills.

At present, although the leachate treatment technology of industrial waste landfills has also developed to a certain extent, the general process is long, the unit control is complicated, and the investment cost and operation cost are relatively high.

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