What is biogas?
Biogas is the gas type produced by anaerobic digestion according to all process conditions such as temperature, pH, correct entry material composition and so on. In general we can say this gas is sustainable and environmentally friendly. It is economically viable fuel that can be used as alternative to natural gas. Biogas consists primarily of methane and carbon dioxide, there is also small amount of trace minerals. Biogas generally contains 50%-75% of methane and 49%-24% of carbon dioxide, including 1% of other gases.
Biogas formation can be characterized as energy waste reclamation from livestock farming, eventually from associated agricultural production (entry material as farm manure, dung water, corn silage fruit and vegetable waste, brewery waste, but also unconsumed food and many other alternatives can be used). It can be formed by industrial and municipal sewage treatement plant waste decompose. By biogas power plant construction, an important step for own energy supply from renewable energy sources is made. It also serves for agricultural or animal production organic waste elimination that is otherwise quite expensive to eliminate. Furthermore the biogas power plant waste (the digestate), biogas formation by-product, can be used as the regulated fertilizer of high quality, eventually as litter for neat-houses or to pellets production as biofuel.
As mentioned above, biogas is created by the anaerobic digestion and of organic materials in closed and heated fermenter. In the fermenter, the organic materials are transformed to biogas by quite complex biological process at temperature of 38 to 42 degree Celsius.
This gas is subsequantly transported from fermenters and will be transferred to electric energy and heat by combination of heat production and electric energy (cogeneration). The ecological cycle is complete, the process only generates as much carbon dioxide as previously has been absorbed by plants during the photosynthesis.