In this study, the anaerobic digestion of different types of organic wastes including swept flour from the floor of flourmills, leftover food and vegetable waste is investigated. The performance of an anaerobic digester is dependent on the type and composition of the materials to be digested as well as the environmental factors such as pH and temperature. In this work, the researchers studied the performance of an up-flow batch digester by measuring the methane generation for different types of feedstock and tried to correlate the methane generation with basic properties of the feedstock. It was generally found that the digester worked well for the range of feedstocks used, with high yield of methane in the retention time between one and three days.