In fact, biogas is the "biomass energy" in the energy structure, which is the combustible gas produced by the storage and fermentation of the past residues, waste plants and so on. The purification of biogas is also a sweating technology. Jinan Biogas Purification Company found that the current application of biogas is mostly concentrated in rural areas, and the wide range of application is relatively limited. After pyrolysis, the reasons are roughly the following:
1. Compared with the more prosperous gas pipeline network in the city, biogas is more convenient to use in the countryside. In addition to the relatively low cost of establishment, biogas can maximize the treatment of rural residues and straw disposal. The cost of establishing regional biogas equipment alone is higher than that in the countryside (mainly land price), and the disposal of biogas residue will not be as convenient as that in the countryside (the countryside can use biogas residue as fertilizer directly).
2. Urban applications of biomass energy are mainly waste recycling and direct combustion of waste to generate electricity. As a large-scale centralized waste disposal method, such as city, the efficiency of biogas generation is too low to respond to the request of urban waste disposal. It is better to burn directly to generate electricity or landfill to achieve higher efficiency.
3. The biggest limitation of biogas production is temperature and humidity. As long as the temperature and humidity are suitable, the bacteria that produce biogas will survive normally and produce biogas. Therefore, in the vast northern region of China, it is very difficult to produce biogas in biogas digesters from late autumn to early spring. Even in some areas, the efficiency of biogas digesters will be greatly reduced by adopting thermal insulation measures.
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