Method for inhibiting consumer waste filling field methane discharging with calcium carbide

Abstract

A method for suppressing discharge of methane in a life garbage landfill by using calcium carbide relates to a method capable of preventing the generation of methane gas in anaerobic digestion processof life garbage. The method comprises the following steps of : selecting technical grade calcium carbide powder on market as the methane generating flora inhibitor of the life garbage; weighing 5 to20 g calcium carbide per each ton of life garbage with the water content of 50% to 80 wt%; adding calcium carbide into the life garbage in routine operation of landfill; measuring the pH value and thetotal acid volatilization amount of percolate of the life garbage to obtain the pH of 6 to 8 and the total acid volatilization amount of 0.69 to 1.07 g / kg; and meanwhile collecting gas by draining saturated salt water method; and determining each component and content thereof in the gas by gas phase chromatography to obtain a methane suppression rate of 88% to 100%. The method has the advantagesof low cost, simple operation and no new pollution, and can obviate green house effect caused by methane release.

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] The greenhouse effect is caused by the infrared rays reflected after the greenhouse effect gas is absorbed by the surface. The increase of human activities has caused the increase in the concentration of the greenhouse effect gas. The concentration of greenhouse effect gases such as carbon dioxide, methane, and freon in the atmosphere has been observed all over the world. Increase. Due to the influence of the greenhouse effect, the greenhouse effect represented by rising sea level and crop yield reduction due to climate change is a slow process. Once it intensifies, recovery is very difficult. Methane is a greenhouse gas that exists in the atmosphere for a long time. Its contribution to...

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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 of 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; 2. The effective concentration is too high, and ammonia nitrogen reports can effectively inhibit The production of methane in the landfill environment, but its concentration must be at least 3000ppm to be effective; 3. It has a good inhibitory effect and a low inhibitory concentration, but it is not suitable for landfills, such as anthraquinones. Due to 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 have a relatively strong effect on the hydrolytic bacteria and acid-producing bacteria Strong inhibitory effect, not conducive to landfill stabilization

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