Defoaming agent for landfill leachate and preparation method thereof

Abstract

The invention provides a defoaming agent for landfill leachate and a preparation method thereof. An organic matter which is synthesized by monounsaturated fatty acid, fatty diacid and alkylol amine is introduced and used as a foam elimination and inhibition synergist E and is compounded with glycerin polyether M and linear or branched fatty alcohol polyether N with the carbon atom number of 10 to 20, wherein the organic matter foam elimination and inhibition synergist E can be used for improving the dispersion effect of polyether, so that the polyether can be dispersed into a system better; meanwhile, the dosage of the monounsaturated fatty acid is improved in a synthesis process of the organic matter so that the foam inhibition effect of the organic matter is improved. The defoaming agent has a good foam elimination and inhibition effect in a landfill leachate treatment process; meanwhile, the dispersity of the defoaming agent in the landfill leachate is finally improved; in an application process, the blocking of a terminal filtering membrane is not caused and the treatment efficiency of the landfill leachate is greatly improved.

Description

technical field [0001] The invention relates to a defoamer, more precisely, a defoamer suitable for landfill leachate. Defoamers belong to fine chemical preparations, so the present invention belongs to the technical field of fine chemical preparations. Background technique [0002] Most cities in my country use sanitary landfill as the basic way of garbage disposal. In the future, sanitary landfill will still be the basic way of domestic municipal solid waste treatment. As the most common garbage disposal method, sanitary landfill also has many pollution problems, especially the large amount of landfill leachate generated during the landfill process, if not properly disposed of, it will cause serious pollution to the surrounding water and soil. [0003] Garbage leachate mainly 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...

AI Technical Summary

Problems solved by technology

However, nonylphenol polyoxyethylene ether is harmful to the environment, toxic to aquatic organic systems, and will cause long-term adverse effects in the organic environment, so it will cause harm to the environment when it is discharged into the ground as a leachate defoamer

[0008] Patent CN 105504290 A mentions that the emulsion-type landfill leachate defoamer prepared by using white carbon black and polyether-modified polysiloxane as the main active substances and adding emulsifier and thickener has good defoaming and Anti-foaming ability, but the use of anti-foaming agents with white carbon black and polyether-modified polysiloxane as the main active substance in leachate will lead to clogging of the permeable membrane, resulting in difficulty in leachate treatment and increased costs

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