Landfill leachate treatment system and treatment method

Abstract

The invention relates to the technical field of landfill leachate treatment, and discloses a landfill leachate treatment system and method, the landfill leachate treatment system comprises a pretreatment module, an electrolysis module, an aeration module, an immobilized bacteria denitrification module and an electrodialysis module; the pretreatment module is provided with a grid and a water inlet; the electrolysis module comprises an electrolysis chamber, an ozone generator and a micro-electrolysis filler layer, the ozone generator is used for generating free radicals, and the micro-electrolysis filler layer promotes the micro-electrolysis reaction of the free radicals and organic pollutants; the aeration module comprises an aeration chamber, a membrane bioreactor, an aeration disc and an air compressor, the membrane bioreactor is laid in the aeration chamber, and the air compressor is used for pressurizing and aerating the leachate; the immobilized bacterium denitrification module comprises an immobilized bacterium carrier layer and a denitrification chamber, and the immobilized bacterium carrier layer is used for removing nitrate nitrogen; the electrodialysis module comprises a dialysis chamber, an anode plate, a cathode plate and a plurality of ionic membranes, and the ionic membranes are used for filtering salt ions in the leachate. The method is low in cost and good in leachate treatment effect.

Description

technical field [0001] The invention relates to the technical field of landfill leachate treatment, in particular to a landfill leachate treatment system and method. Background technique [0002] At present, with the increase of urban population, the rapid development of industrialization and the continuous development of the economy, domestic waste, municipal and industrial solid wastes have increased rapidly. According to statistics, 95% of the municipal solid wastes in the world are disposed of through landfills. However, the leachate produced by the landfill is complex in water quality, high in chroma, rich in organic matter, ammonia nitrogen, heavy metals and toxic substances, and the proportion of nutrients in the leachate is unbalanced, which is easy to vary with the scale of the landfill, the volume of the reservoir, and the amount of landfill. It varies according to the age of the field, the season, and the weather. Both traditional physical and chemical techniques...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the existing leachate treatment method has high cost and high concentration, which is easy to cause membrane fouling

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