Landfill leachate treatment method based on ceramic membrane

Abstract

The invention provides a landfill leachate treatment method based on a ceramic membrane. The method comprises the following steps: firstly, adding a reagent into a landfill leachate in a first reaction tank for reaction, adding magnetized water or a dispersing agent at the same time, controlling the pH value of the reaction in the first reaction tank to be 10.5-11.2, and controlling the reaction time in the first reaction tank to be 5-20 minutes; enabling outgoing water of the first reaction tank to enter a second reaction tank, adding a reagent into the second reaction tank for a deaminationreaction, and meanwhile, aerating the second reaction tank by an aeration device, and enabling ammonia gas generated in the second reaction tank to enter a recovery system; filtering outgoing water ofthe second reaction tank by a ceramic membrane, then conducting reverse osmosis treatment and discharging; and carrying out advanced oxidation treatment on concentrated water subjected to the reverseosmosis treatment, and conducting discharging after the COD (Chemical Oxygen Demand) of the degraded landfill leachate reaches a standard. Magnetized water is adopted to replace traditional flocculants and coagulant aids for water quality modification, the lattice arrangement and the crystal form of generated precipitates are changed, flocculent precipitates become fine and loose, and unrecoverable membrane pollution and blockage of a subsequent filter membrane are avoided.

Description

technical field [0001] The invention relates to the field of garbage treatment, in particular to a method for treating landfill leachate based on ceramic membranes. Background technique [0002] There are three main ways to deal with domestic waste in my country, namely sanitary landfill, incineration, and composting. Among them, the sanitary landfill method has become the main method of domestic waste treatment due to its advantages of simple process, large processing capacity and low cost. However, the leachate produced by municipal solid waste after sanitary landfill contains complex toxic and harmful components. For example, it contains high concentrations of organic pollutants with complex components, nitrogen and phosphorus pollutants with eutrophication effects, and various heavy metal pollutants. These toxic and harmful substances interact with the surrounding environment through soil, surface, water, air, etc., seriously threatening the environment and the health o...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for treating landfill leachate, which solves the serious membrane pollution and high cleaning frequency of membrane elements in the existing landfill leachate treatment process; it is difficult to effectively remove COD (chemical oxygen demand), ammonia nitrogen, and salt at the same time Etc., it is difficult to meet the production water standard; the vicious circle problems such as the low age of the waste landfill caused by recharge

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