Method and system for harnessing consumer waste landfill percolate

Abstract

The invention discloses a treatment method for percolate in domextic garbage landfill area, which comprises, taking ammonia blow-off to the percolate to degradate the ammonia and nitrogen; taking coagulate and deposite treatment to remove the biochemical property of organic and suspended matter; taking biochemical treatment and following membrane treatment. It also discloses the opposite system, which comprises connected by pipes an adjust pond, a pre-aeration pond, a first deposition pond, an ammonia blow-off tower connected to absorption tower, a middle pool, a second deposition ponds, an A2 / 0 technical device, an end deposition pond, a temporary storage pond, a membrane treatment system and clear-water pond; wherein, three deposition ponds and the membrane treatment system connects to sludege pond linked with pressure filter.

Description

Technical field [0001] The invention relates to a method and system for treating landfill leachate by combining physical and chemical treatment with biological treatment and membrane technology, and belongs to the new environmental protection technical field. Background technique [0002] Landfill leachate is a kind of high-concentration organic wastewater that is difficult to treat. It mainly comes from the following three aspects: (1) natural rainfall and runoff in the landfill; (2) the original water content of the garbage itself; (3) The water produced by the anaerobic decomposition of microorganisms after the sanitary landfill. When the garbage contains 47% water, 0.0722 tons of leachate can be produced per ton of garbage. The biochemical reaction produces much less water. Atmospheric precipitation is concentrated, short-term, and repetitive. The leachate formed by the precipitation that has not been drained in time permeates the garbage layer and accounts for most of the to...

AI Technical Summary

Problems solved by technology

[0006] 4. The concentration of nitrogen compounds is high, mainly ammonia nitrogen, generally at 1500mg / l. Although the content of ammonia nitrogen is high, it lacks phosphorus, which brings certain difficulties to biological treatment;

[0007] 5. The composition is complex and there are many types of organic pollutants, including naphthalene, chlorinated aromatic compounds, phosphate esters, phthalates, phenolic compounds and aniline compounds that are difficult to biodegrade;

[0014] Due to the complex composition of the leachate water quality, it is impossible to meet the first-level standard of the design with a single biological treatment or physical and chemical treatment, and it will cause uneconomical treatment costs. Therefore, it is necessary to consider the synergistic effect of multiple methods

In addition, high concentrations of ammonia nitrogen (above 1000 mg / l) have a significant inhibitory effect on anaerobic microorganisms, making the anaerobic removal efficiency low

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