The Effect of Physics (Grinding) in 4 Kinds of Measures on Biogas Production from Rice Husk Waste in Solid State Anaerobic Digestion (SS-AD) Conditions Syafrudin, A Bahrani, W D Nugraha, Junaidi, M A Budihardjo, and A T Listiyawati
Department of Environmental Engineering, Faculty of Engineering, Diponegoro University, Semarang, Indonesia 50275, Indonesia
Abstract
Biogas technology is an alternative solution to the problem of the energy crisis. Biogas is a renewable and environmentally friendly fuel. This research aims to determine the optimum value of variations in grinding size of biogas production with the Solid State Anaerobic Digestion (SS-AD) method of biogas production from rice husk waste. It is subjected to preliminary treatment with chemical pretreatment (NaOH). Rice husk was soaked with 6% NaOH concentration for 24 hours as a control variable. Grinding variations used as physical pretreatment are 10 mesh, 18 mesh, 35 mesh, 60 mesh. The bioreactor used has a volume of 200 ml. All reactors observed biogas volume produced every two days for 60 days of research. The results showed that the reactors with variations of grinding 10 mesh, 18 mesh, 35 mesh, 60 mesh obtained a total biogas yield of 11.68584- 9.479955- 12.50772- 19.03718 ml/grTS until the 60th day. Control reactors (without grinding variations) produce 9.084606 ml/grTS. The highest biogas production rate is 60 mesh with value, (A) as much as 19.03718 (ml/grTS)- the rate of biogas production (U) of 0.2416979 (ml/grTS.day)- and the minimum time for biogas formation is 3.83908 days.
Keywords: rice husk, solid state anaeobic digestion, grinding, biogas production
