Treatment method of landfill leachate

Abstract

A treatment method of landfill leachate includes the following steps: 1) treating the landfill leachate respectively through a regulation tank, a UASB reactor, an A / O tank, an ultra-filtration device,an A / ABFT tank and a nano-filtering device according to a biochemical / membrane filtration combined process so as to produce a concentrate; 2) feeding the concentrate into a coagulation reaction device to prepare a liquid mixture, and feeding the liquid mixture into a TMF apparatus to perform micro-filtration to prepare a micro-filtration permeation liquid; 3) testing the concentration of the micro-filtration permeation liquid and determining whether the concentration of same is lower than a preset concentration or not; 4) if the concentration of the micro-filtration permeation liquid is lowerthan a preset concentration, feeding the micro-filtration permeation liquid into a DTRO device to perform reverse osmosis, thus producing a reverse osmosis concentrate, and performing MVR evaporationand spray drying treatment to the reverse osmosis concentrate. The treatment method can effectively enable the landfill leachate to reach emission standard, wherein the concentrate is subjected to classification treatment, so that zero-emission of the concentrate is achieved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a treatment method for landfill leachate. Background technique [0002] Landfill leachate is mainly waste water produced during landfill or incineration treatment. It has high concentration of organic waste water such as high chroma, high organic content, strong toxicity, refractory degradation, heavy metals, large acid-base changes, and solid waste. typical characteristics. [0003] When the landfill leachate is discharged into the natural environment, the polluting components will stay in the environment for a long time, causing "three causes" (carcinogenic, teratogenic, and mutagenic) effects, which pose a great threat to human health and the natural ecosystem. With the rapid increase in the volume of urban garbage removal in my country, this threat is becoming increasingly serious. In 2010, my country's landfill leachate output exceeded 56 million tons, of which at ...

AI Technical Summary

Problems solved by technology

Usually contain high concentrations of refractory toxic, harmful, organic pollutants, ammonia nitrogen compounds, suspended solids and other pollutants, which have a great degree of pollution to the environment, and it is difficult to meet technical and economic requirements by conventional biological or physical and chemical purification methods.

[0004] In the existing technology, the combined process of biochemical + membrane filtration is usually used to treat landfill leachate, but from the current status of my country's landfill leachate treatment engineering technology, there is still a lack of economically feasible technology to simultaneously realize landfill leachate. Treatment compliance and zero discharge of concentrate

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