Method for preparing biogas by dry-fermenting sugarcane leaves as raw materials

Abstract

The invention discloses a method for preparing biogas by dry-fermenting sugarcane leaves as raw materials, which is characterized in that the method comprises the following concrete steps: pretreating the sugarcane leaves as the raw materials by cutting harvested sugarcane leaves into small pieces or grinding the sugarcane leaves and adding water to wet the obtained product for a period of time; directing stacking and soaking the obtained product or adding 0.5 to 1 percent of Lujieling, stirring the two and evenly stacking and soaking the obtained product and holding stacking-soaking temperature up to above 50 DEG C for more than three days; mixing the obtained mixture and inoculum well for inoculation; obtaining and putting a fermentation raw material into a fermentation device; sealing the fermentation device; controlling reaction temperature between 35 and 38 DEG C; performing fermentation for gas production; and producing biogas, namely a target product after 1 to 2 days. The method has the advantages of greatly easing current energy shortage problem in China, helping to save energy and protect environment and returning biogas residue to fields in order to improve soil, reduce fertilizer consumption and then reduce production cost of sugarcane.

Description

technical field [0001] The invention relates to a method for converting biological organic material raw materials into combustible gas, in particular to a method for preparing biogas by dry fermentation of sugarcane leaves as raw materials. Background technique [0002] With the rapid development of my country's economy, the gap between the supply and demand of oil, natural gas, coal and other resources has increased year by year, and the price has also continued to rise. Many farmers are reluctant and cannot afford expensive gas and coal. In terms of bio-organic raw materials, sugarcane is the largest crop in tropical and subtropical regions of my country, and the planting area in 2005 reached 1.414 million ha 2 , ranking third in the world. The sugarcane leaves and sugarcane tips discarded in the sugarcane field after harvest are generally about 15t-16t per hectare. According to this calculation, the total amount of sugarcane leaves abandoned in the sugarcane field in my ...

AI Technical Summary

Problems solved by technology

In order not to interfere with field operations, the current methods for disposing of sugarcane leaves abandoned in the sugarcane fields are: (1) Burning. At present, most of the sugarcane leaves in our country are burned on the spot. When burning, a large amount of smoke will be produced, which seriously pollutes the environment. air, and affects the safety of surrounding roads, railways and civil aviation, and is easy to cause fires, seriously affecting people's normal life

(2) Crushing and returning to the field. In foreign countries, high-power tractors are generally used to pull aggravated disc harrows to crush and crush leaves, but the power consumption is large and the crushing rate is not high; Jiangxi Tractor Factory, Guangdong Zhanjiang Agricultural Reclamation Research Institute and Agricultural Machinery Research Institute of Chinese Academy of Tropical Agricultural Sciences have successively developed sugarcane leaf crushing machinery, but so far, sugarcane leaf crushing and returning machinery has not been widely used

Sugarcane leaves are rich in organic matter, and it has not been reported at home and abroad to use it as an energy resource for biogas fermentation

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