Preliminary Investigation on Production of Biogas from Domestic Sewage

A domestic biogas digester was used to test the concept of controlled anaerobic digestion. A mixture of 20kg cow dong, 4kg of water hyacinth, and 8 kg of domestic waste, was used to run the test. Result showed that a reasonable amount of biogas is generated on the second day of the test period. However, during the 5th and 7th day of the 10 days test period, biogas production was at its peak. The design is simple and easy to use. This design is capable of enabling the layman grasp the function and theory behind each component of the design with only a small amount of guidance. The idea here is to encourage people looking at the design to think and understand the requirements of controlled anaerobic digestion and the continuous flow model.