Landfill leachate treatment system and landfill leachate treatment method

Abstract

The invention relates to a landfill leachate treatment system and a landfill leachate treatment method. The landfill leachate treatment system comprises a tank, a flocculation reaction pond, a settling pond, a photo-catalytic oxidation reactor, an ultrafiltration membrane filter, an RO membrane filter and a resin adsorption column are successively communicated and arranged inside the tank and areadjacently connected through centrifugal pumps, the RO membrane filter is provided with a concentrated water outlet and a plain water outlet, the concentrated water outlet is communicated with the flocculation reaction pond so as to enable concentrated water to flow back, and the plain water outlet is communicated with the resin absorption column so as to enable plain water to be absorbed and purified by the resin absorption column and be discharged after reaching standard. The landfill leachate treatment system has the advantages that a plurality of treating units are assembled in the tank totreat landfill leachate in a concentrated manner, and the landfill leachate treatment system small in occupied area and high in movability can be moved among various waste transfer stations conveniently and flexibly; the treating units can be flexibly assembled according to water quality variation of the landfill leachate, a water discharging volume of the membrane filter can be adjusted, and thelandfill leachate treatment system is adjustable in operation time, high in anti-load capacity and high in seasonal applicability.

Description

technical field [0001] The invention belongs to the technical field of garbage treatment and environmental protection, and in particular relates to a garbage leachate treatment system and method. Background technique [0002] In the process of garbage dumping and landfilling, landfill leachate wastewater is produced due to fermentation, precipitation leaching, and surface and groundwater infiltration. The leachate has complex components, high organic matter concentration, high ammonia nitrogen concentration, various heavy metal ions, and high salt content. It is dark black and emits a foul odor. [0003] The landfill leachate has the following characteristics: (1) The water quality changes greatly before and after the leachate. The water quality of leachate varies greatly. It not only reflects that the water quality varies greatly in different seasons in the same year, and the concentration range can be as high as several times. With the increase of landfill years, the wate...

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Problems solved by technology

(3) High content of some heavy metal ions

(4) High content of ammonia nitrogen

(5) The ratio of nutrients is out of balance

(6) High salt content

Landfill leachate usually contains a large amount of salt, and the total salt content is usually as high as 10,000mg / L or more. Membrane treatment will cause low water production rate due to excessive osmotic pressure, and biochemical treatment will cause high salt content. Cause difficulty in starting, unstable operation, or even failure to operate

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