- How much energy is in biogas? - Each cubic meter (m3) of biogas contains the equivalent of 6 kWh of calorific energy. However, when we convert biogas to electricity, in a biogas powered electric generator, we get about 2 kWh of useable electricity, and the rest turns into heat which can also be used for heating applications. 2 kWh is enough energy to power a 100 W light bulb for 20 hours or a 2000W hair dryer for 1 hour. Try it now!
- What happens to the waste after digestion? - Despite popular belief, the amount of waste going in the digester is almost equal to the amount coming out. However the quality of the waste is altered for the better (less odor, better fertilizer, organic load reduced, less polluting). Waste coming out of the digester can be separated (solid/liquid): the solid part can be composted and the liquid part can be used as liquid fertilizer or can be treated further and disposed. Try it now!
- So why make biogas? - It always costs money to get rid of waste. If it doesn’t cost you anything, you are probably creating an environmental hazard. By putting a digester in your waste treatment chain you introduce a potential revenue center. Try it now!
On a farm the manure is not considered to be a waste but a fertilizer. By installing a digester the farmer can profit from the biogas by reducing odors and enhancing the fertilizing value of the manure. In an agro-food industry the digester can be used as a primary waste treatment unit where the biogas is used to offset some energy cost in the plant and to reduce the size of the secondary waste treatment.