Suman Khadka
Biogas is an energy carrier produced in an anaerobic digester (AD) from organic matter such as agricultural residues, manure, municipal waste, and industrial waste streams. It typically consists of 55–70% methane (CH4), 30–45% carbon dioxide (CO2), and trace amounts of other components such as ammonia, carbon monoxide, nitrogen, and oxygen. The produced biogas can be used in gas engines to generate heat and electricity, and the efficiency of such systems is typically above 85% or it can be upgraded to biomethane to be used as a fuel in the transportation sector. (Jørgensen 2009.)
Jatka lukemista ”Enhancing Methane Yield through Biological Biogas Upgrading”