Process of biogas production by using household garbage fermentation

Abstract

The invention belongs to the technical field of biogas production, and provides a process of biogas production by using household garbage fermentation. The process comprises the following steps of classifying household garbage, crushing the classified treated household garbage, taking biogas slurry from a normal fermentation biogas pool, and immersing the crushed household garbage into the biogas slurry for 8-18 days; during the immerse period, flipping the household garbage 2-4 times a day; adjusting the pH value of the fermentation biogas pool, and obtaining a fermentation raw material; adding the fermentation raw material into an anaerobic fermentation tank for fermentation, feeding one third of the biogas slurry, which serves as an inoculum, of the fermentation biogas pool into the anaerobic fermentation tank, and adding water to adjust the concentration of the mixture TS to 11-13%; adding zymophyte agents at a dosage of 0.1-0.12 kg/m<3> mixture, stirring completely, wherein biogas starts to emerge through anaerobic fermentation, and during biogas generation, adding desulfurizing agents 2-3 times into the fermentation mixture. The process can achieve reasonable reuse of waste, and has the advantages of being high in the biogas generating efficiency, easy to popularize and adaptive to the national policies of sustainable development and a recycling economy in China.

Description

technical field [0001] The invention belongs to the technical field of biogas production, and in particular relates to a process for producing biogas by fermenting domestic garbage. Background technique [0002] Domestic garbage pollution is serious, and many cities and towns, large and small, are besieged by garbage. Landfills take up a lot of land that can be used for farming, and landfills pollute rivers, lakes, oceans, land and groundwater. According to statistics, 750,000 mu of land has been used to landfill municipal solid waste over the years, and the government has had to invest in the construction of a large number of waste incineration power plants. , waste electronics, waste energy-saving lamps, waste button batteries, etc. Waste incineration may produce dioxin pollution. ash, and the content of dioxin in the dust removal fly ash of its waste incineration power plant is thousands to tens of thousands of times, and it is difficult to degrade naturally for hundreds...

AI Technical Summary

Problems solved by technology

According to statistics, 750,000 mu of land has been used to landfill municipal solid waste over the years, and the government has had to invest in the construction of a large number of waste incineration power plants. , waste electronics, waste energy-saving lamps, waste button batteries, etc. Waste incineration may produce dioxin pollution. ash, and the content of dioxin in the dust removal fly ash of its waste incineration power plant is thousands to tens of thousands of times, and it is difficult to degrade naturally for hundreds or thousands of years. A large amount of kitchen waste, due to its high moisture content , which is not conducive to the operation of garbage incinerators, a large amount of sludge from various urban domestic sewage treatment plants and a large amount of industrial organic sludge have to be disposed of at high prices or landfilled