Method for using chloromethane to inhibit methane discharging of consumer waste filling field

Abstract

A method for restraining the methane discharge at a living garbage landfill field by using methyl chloride relates to a method which can stop the generation of the methane gas in the process of the anaerobic digestion of living garbage. Firstly, the methyl chloride of technical grade sold in the market is used as a depressor for the methane generating flora of the living garbage; then, each ton of living garbage is added with 5 to 25g of the methyl chloride and the water containing rate of the living garbage is 50 to 80 percent; then the methyl chloride is uniformly sprayed in the living garbage during the normal operation of the landfill field; finally, a measurement on the volatilization acid of the percolate of the living garbage is carried out; simultaneously the gas is collected by using a method of discharging the saturated salt water; a gas chromatography is used for detecting each component and content in the gas; the total capacity of the volatilization acid is 0.94 to 1.18g / kg; the ratio of monoprop to acetic acid is 0.73 to 1.24; the methane restraining effect can reach 100 percent. The invention has the low cost and the simple operation, which avoids the greenhouse effect caused by releasing the methane; and carries out control on the metabolizing of acid generating flora simultaneously when restraining the methane, which promotes the stabilization course of the landfill field.

Description

technical field [0001] The invention relates to a method capable of preventing the generation of methane gas in the anaerobic digestion process of domestic garbage, and belongs to the technical field of solid waste recycling and pollution prevention and control. Background technique [0002] Atmospheric methane is second only to CO 2 important greenhouse gases. Global methane emissions reach 5.35×10 per year 8 t, the amount of methane produced by human activities is 3.75×10 8 t. It is estimated that the contribution of methane will reach 50% by 2030, making it the number one greenhouse gas. It can be seen that controlling the emission of methane is very important for suppressing the greenhouse effect. Currently, the world is looking to reduce CO 2 However, insufficient attention has been paid to methane, which has led to an increase in the amount of methane, and the reduction of those chemical substances that can react with methane to reduce its content is not very cle...

AI Technical Summary

Problems solved by technology

Therefore, the anaerobic biological metabolic process is a process in which microorganisms transmit substances in series. To prevent the production of methane gas, the methanogenic bacteria must be suppressed. Many people protect themselves based on the fact that methanogenic bacteria cannot form spores in harsh environments The characteristics of methanogenic bacteria are killed by heating, microwave, ultraviolet and other methods, but the operation is complicated, and it is not suitable for the suppression of methanogenic bacteria in domestic waste landfills and other places

[0004] Although there are many methods for inhibiting methanogens reported at present, there are the following problems: 1. The inhibitory effect is not ideal, and some microbial inhibitors can only inhibit about 50% of methane production; Effectively inhibit the generation of methane in the landfill environment, but its concentration must reach at least 3000ppm to be effective; 3. It has good inhibitory effect and low inhibitory concentration, but it is not suitable for landfills, such as anthraquinone Because of its extremely low solubility, it is difficult to diffuse into the solid phase where the methanogenic bacteria in the garbage gather; monensin and lasalocid can inhibit the methanogenic bacteria and also inhibit the hydrolytic bacteria and acid-producing bacteria. Produces a strong inhibitory effect, which is not conducive to the stabilization of landfills

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