Biogas was produced from the mixture of Sheep dung and Water lettuce (Pistia stratioles) in the ratio of 2:1 and 1:2 over a period of 77 days. Proximate analysis was done to determine the physicochemical parameters of each dried sample. Daily temperature of the laboratory. initial and final pH of the digesters containing slurry was recorded. https://excellentphoto.shop/product-category/rangefinder/