one of the greatest challenges which societies are facing now and will face in future is the reduction of Green House Gas emissions, thus preventing the climate change. Therefore its must now to replace fossil fuels with renewable resources like Biogas. Biogas can be produced from various organic waste, or as a byproduct from industrial processes. there are other advantages also besides energy production, such as prevention of odour release and the decrease of pathogens through anaerobic digestion. moreover, the nutrients rich digested residue can be used as a fertilizer for recycling the nutrients back to the fields.