The biogas plant is planned to be located in the Ngawi area, East Java. This factory covers an area of 7.52 Ha with a capacity of 1,535 Tons/year. The process of making biogas is carried out through a rice straw fermentation process with the help of anaerobic bacteria inoculum at a temperature of 35oC and pressure. The fermentation reaction takes place in the Continuous Stirred Tank Reactor (CS…