Preparation method of biogas in alpine regions

Abstract

The invention discloses a preparation method of biogas in alpine regions. The method comprises the following steps: S1, putting raw materials into a primary fermentation device for aerobic fermentation for 3-5 days to obtain a primary fermentation material; S2, conveying the primary fermentation material into a biogas generator, adding an anaerobic fermentation liquid accounting for 5-10% of the mass of the primary fermentation material, and performing anaerobic fermentation in a sunlight room for 18-22 days; S3, adding Azotobacter chroococcum into a hydrochloric acid solution, performing stirring and mixing, then introducing a biogas pipeline into the hydrochloric acid solution, and then introducing biogas into a copper sulfate solution to obtain primarily purified biogas; and S4, introducing the primarily purified biogas into a U-shaped filter pipe, and carrying out drying and oxidation filtration so as to finally obtain the purified biogas, wherein a drying filter agent located at the left side of the U-shaped pipe and an oxidation filter agent located at the right side of the U-shaped pipe. According to the preparation method provided by the invention, the principle of combination of aerobic and anaerobic treatment is fully utilized, rapid fermentation of the raw materials is promoted, and the technical problem that biogas cannot be produced in winter in a cold region is solved.

Description

technical field [0001] The invention relates to the technical field of biogas fermentation, in particular to a method for preparing biogas in alpine regions. Background technique [0002] It is estimated that the country produces 3.8 billion tons of cow manure every year, and the comprehensive utilization rate is less than 60%; about 60,000,000 live pigs are eliminated each year, and the proportion of centralized professional harmless treatment is not high; the annual production of straw is nearly 900 million tons , about 200 million tons are unused; more than 2 million tons of agricultural film are used every year, and the recovery rate in the current season is less than 2 / 3. These agricultural wastes that have not been recycled and treated harmlessly are large in volume, wide in area, piled up, placed indiscriminately, and incinerated randomly, which has seriously affected the urban and rural ecological environment. [0003] In livestock and poultry breeding, the larges...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a method for preparing biogas in alpine regions. The biogas generator is installed in the sun room, and the sun room plays the role of heat preservation and temperature raising for the biogas generator. In addition, the aerobic and anaerobic methods are fully utilized Combining the principle, the raw materials are first subjected to aerobic fermentation, and the heat is used to increase the temperature of the raw materials, then put into the tank, and then anaerobic fermentation liquid is added to promote the rapid fermentation of raw materials, which solves the technology that cannot produce biogas in winter in cold regions question