Method for preparing methyl hydride and hydrogen gas with mineralized garbage, leachate, kitchen garbage and sewage sludge

Abstract

The invention relates to a method for producing methane and hydrogen by aged refuse, leachate, kitchen wastes and mud, comprising the following steps that: the kitchen wastes are crushed, the mud passes through a sieve with 1.25mm, the water contents of the mud and the kitchen wastes are adjusted to 90 weight percent; then the mud, the kitchen wastes and the leachate are taken according to the ratio of (10-90 percent) to (5-45 percent) to (5-45 percent), the aged refuse accounting for 5 percent of the total weight of the mud, the kitchen wastes and the leachate are added, and the C / N is between 7.0 and 7.5, the pH is between 5.8 and 6.2; the materials are pumped into an anaerobic fermentation tank, nitrogen passes through to expel oxygen in the tank, the reaction is carried out for 15 days at a temperature of between 20 and 55 DEG C, and gas mixture of CH4 and H2, with H2 concentration between 4 and 10 volume percent and CH4 concentration between 55 and 57 volume percent, is produced. The method has easy operation, low cost and precious economic and social benefits. The gas mixture produced by the method improves generating efficiency of the methane by 10 to 15 percent, and well solves the problem of difficult ignition in the process of methane power generation.

Description

technical field [0001] The invention relates to a method for producing methane and hydrogen from mineralized garbage, leachate, kitchen garbage and sludge. Specifically, it is a process in which the above-mentioned waste biomass is combined with anaerobic fermentation to simultaneously obtain methane and hydrogen. The invention belongs to the technical field of organic waste recycling. Background technique [0002] As primary energy sources, fossil fuels are becoming increasingly exhausted, and their extensive use has also caused serious environmental pollution problems. The primary energy sources represented by petroleum will eventually be replaced by other energy sources. The research and development of biomass energy technology has become one of the major hot topics in the world. However, due to the blind development of biomass fuel in recent years, there has been competition for land with grain, which may cause food famine and ecological damage. Countries such as the N...

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Problems solved by technology

Chinese patent application "a method for the joint production of hydrogen from mineralized waste and swill waste and sludge" (application number: 200610027750.3) and "a method and device for hydrogen production by anaerobic fermentation of residual sludge in sewage plants" (application No.: 200310116142.6) discloses a method for anaerobic fermentation to produce hydrogen, but the concentration of hydrogen is usually at most 50-60%, which cannot be directly utilized

However, the hydrolysis phase in the traditional two-phase reactor is mainly to produce acid and remove CO 2 Almost no other gases are formed outside

However, in the current industrial practical application, the single-phase reactor has an absolute advantage, mainly because the traditional two-phase reactor is more expensive and difficult to operate and maintain than the single-phase reactor.

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