Biogas Production from Tofu Processing Waste and Rice Straw with the Addition of Beef Bone Lime

Abstract

The waste processing of tofu and rice straw can be used as the basic material for making biogas. The  acidic pH of the waste will cause a non-optimal biogas production. This research was conducted using NaOH and the variations of beef bone lime 3 replications. The purpose of this study was to obtain the value of volume, pressure, biogas production rate and flame quality. The result showed the best quality of flame with a blue color (for 64.48 seconds) and 962 ml/day of biogas production rate was obtained by adding 3% of beef bone. The highest volume was obtained by adding 3% of beef bone lime (2210.33 ml) and the highest pressure was obtained by adding 2% and 3% of beef bone lime (1.0159 bar).