Household pure straw biogas fermentation process

Abstract

The invention relates to a household pure straw biogas fermentation technology. The household pure straw biogas fermentation technology comprises the following steps: preparing straws, a straw decomposing agent, pre-treatment liquid and an inoculant; carrying out pre-treatment on raw materials, and then feeding materials and starting fermentation to produce biogas; and reloading, further fermenting or stopping fermentation. The household pure straw biogas fermentation technology is built for a household biogas digester specially, pure straw biogas fermentation can be realized in the household biogas digester only adopting the pure straws, the straw decomposing agent and biogas slurry and biogas residue from a biogas digester in normal operation, biogas can be stably produced, dependence on excrements of livestocks which serve as raw materials is avoided, and the raw material problem of the household biogas digester is solved; no other extra material is needed, and no other extra facility is adopted, low-cost operation is maintained to the utmost extent, and no chemical pollution is produced.

Description

technical field [0001] The invention relates to a household pure straw biogas fermentation process, which belongs to the improvement of the household biogas technology. Background technique [0002] As far as the applicant knows, due to the high C / N ratio of straw and insufficient nitrogen source, most biogas digesters using straw as raw material need to add additional nitrogen source such as livestock manure or nitrogen fertilizer to ensure the smooth progress of fermentation . However, the prior art has the following disadvantages: (1) straw contains a large amount of cellulose, hemicellulose and lignin, and is intertwined with each other, and the surface is also covered with a layer of wax to support, protect and avoid microbial attack This will make the degradation of straw extremely slow, resulting in problems such as slow start-up, low gas production rate, unstable reaction process, and severe crusting in the production of biogas from straw. (2) With the change of ru...

AI Technical Summary

Problems solved by technology

However, the prior art has the following disadvantages: (1) straw contains a large amount of cellulose, hemicellulose and lignin, and is intertwined with each other, and the surface is also covered with a layer of wax to support, protect and avoid microbial attack This will make the degradation of straw extremely slow, resulting in problems such as slow start-up, low gas production rate, unstable reaction process, and severe crusting in the production of biogas from straw.

(2) With the change of rural life style, livestock and poultry breeding is mainly developed in the form of scale and intensification, which makes household biogas digesters gradually lose the raw material guarantee of livestock and poultry manure, and cannot play a good role

However, in this patent application, (1) the time required for pretreatment is still relatively long, which is not conducive to increasing gas production by reducing material loss; It is difficult to continue to survive, so it cannot continue to play a role, which is unavoidably wasteful; (3) it is actually aimed at large and medium-sized biogas digesters with stirring devices, and cannot be directly applied to household biogas digesters without stirring devices, and it is not recorded at the same time How to modify the process to make it suitable for household biogas digesters

Images