Landfill leachate pretreatment method

Abstract

The invention relates to the technical field of landfill leachate treatment, particularly to a landfill leachate pretreatment method, which comprises the following steps: softening a landfill raw material, compressing the landfill raw material, extracting landfill leachate, carrying out flocculation deposition on the landfill leachate, filtering flocculation deposits, and reducing the content of metal ions through electrolytic treatment. The method has the beneficial effects that the landfill leachate is flocculated and deposited by using a modified flocculant, so that suspended solids in thelandfill leachate can form a cloud cluster from particles, the volume and the weight of the suspended solids are greatly increased, the suspended solids can be deposited conveniently, the flocculationand deposition efficiency of the suspended solids is improved, and the landfill leachate can be purified by filtering; and the flocculated deposits are filtered and separated, and then electrolytic treatment is performed, so that metal ions in the landfill leachate are filtered, the treatment process is increased, and the treatment efficiency of the landfill leachate is integrally improved.

Description

technical field [0001] The invention relates to the technical field of landfill leachate treatment, in particular to a pretreatment method for landfill leachate. Background technique [0002] Landfill leachate refers to the moisture contained in the garbage itself in the landfill, the rain and snow water and other moisture entering the landfill, deducting the saturated water holding capacity of the garbage and the covering soil, and passing through the garbage layer and the covering soil. A high concentration of organic waste water, with water seeping from accumulated waste destined for incineration. [0003] During the treatment of landfill leachate, it is generally necessary to pretreat the suspended matter in the landfill leachate in the waste raw material. At present, the suspension is mainly deposited by the use of flocculants, that is, the flocculant wraps the suspended matter to increase the suspension. The weight of the suspended matter, and then the suspended matte...

AI Technical Summary

Problems solved by technology

[0003] During the treatment of landfill leachate, it is generally necessary to pretreat the suspended matter in the landfill leachate in the waste raw material. At present, the main method is to use a flocculant to deposit the suspended matter, that is, the flocculant wraps the suspended matter to increase the suspended matter. The weight of the suspended solids, and then the suspended solids are deposited on the bottom of the landfill leachate, so that the suspended solids and the landfill leachate can be separated, but the current flocculants can only slightly increase the weight or volume of the suspended solids, resulting in low efficiency of flocculation deposition In addition, the existing landfill leachate treatment process is relatively simple, which leads to low treatment efficiency of landfill leachate

Images