The objective of the research was to produce biogas by anaerobic co-digestion of biomass and urban solid waste. which made it possible to take advantage of these organic wastes. transforming them into a renewable energy source such as biogas being a fuel with an high calorific on an average of 19. 6 to 25 MJ/m3. https://danddcollectiblers.shop/product-category/eye-care/