1.What is biogas?
Bio gas is the by product of the decomposition of organic matter anaerobically. Primary composition is 60% CH4 , 40% CO2.
2.What type of waste produces biogas?
Any organic waste has the ability to produce biogas. Human excreta, manure, animal slurry, fruit and vegetable waste, slaughterhouse waste, meat packing waste, dairy factory waste, brewery, distillery waste e.t.c.
3.How much biogas can I get out of my waste?
Depends on the chemical composition of your waste and the digester design and efficiency. Some examples are that some digesters can yield 20m3/ tonne waste while others can yield 800m3/tonne of waste.
4.Why do we produce CH4 since is a GHG?
Methane is naturally produced during the waste digestion. Therefore is an inevitable gas product. By extracting methane out of the waste the natural degradation process is speeded up with in a controlled environment therefore reducing inevitable emissions. Moreover the energy released when methane is being combusted can displace fossil fuel.
5.How much energy is in biogas?
Each cubic meter of biogas contains the equivalent of 6kWh of calorific energy. Out of 6kWh, 2kWh is the available electricity and 4kWh is available heat which can be utilized for further electricity production (applying turbine).
6.What happens to the waste after digestion?
Can be used for fertilizing applications.
7.Does anaerobic digester smells?
There is some odour related with the organic material that goes into a digester. The odour can be reduced if the waste are delivered in closed vessels and vehicles in a closed reception area. The digestion process that takes place in a tank does is less odorous than the common practice of storing slurry in pits.
8.How long does it take to digest the organic matter?
It depends on the feedstock. The maximum time that organic materials needs to be digested is about 30 days.
9.How is biogas used?
Biogas is concentrated at the top of the tank. From the top of the digester tubes and pipes allow the gas to slowly release from the tank to a container. Biogas can be used at a boiler to generate hot water or steam/ electricity or it can be purified as methane pressurised and injected to the gas pipeline.
10.Is biogas flammable?
Biogas is flammable and must be used and transported with care. As long as the pipes are properly sealed, flame extinguish measures are relatively close to digester and no flame source is close to the digester no flammable concerns should exist.
11.What are the total CO2 emissions avoidance related to wind turbine operation?
The heat normally generated reaches the temperature of 100 0C and can be utilized to satisfy the heating requirements of the closest facility.