Jatropha Oil Cake (JOC) based Flexible Balloon Stirring Digester (FBSD) of 6 cum capacity was designed and installed at Gopal Pura (Bhindar) near Udaipur under Public – Private – Project mode. The present investigation showed that Jatropha Oil Cake had biogas generation potential of 101.65 litre per kg of dry matter. A stirring device was used to agitate the slurry inside the digester. The methane content of biogas derived from JOC was found to be in the range of 63–68%.

Keywords: Balloon digester; Jatropha Oil Cake; Anaerobic digestion; Biogas.