it is a large potential for the production of energy crops on agricultural land like Thailand . Most of the biomass produced has alternative use as food or waste. In most cases, energy utilization of the biomass is still not popular .
The impact on the greenhouse gas balance is the most important positive factor for biomass energy including with biomass energy systems using low quality biomass, originating from the residuum agricultural biomass production are food or waste
three scientist ,Itodo ,Phillips ,and GEMET described biogas as “a methane-rich gas that is produced from the anaerobic digestion of organic materials in a biological-engineering structure called the digester” and states that biogas is “gas rich in methane, which is produced by the fermentation of animal dung, human sewage or crop residues in an air-tight container”.