Abstract
Biogas technology solves the problem of energy crisis. Biogas is a renewable and environment friendly fuel (Franthena, 2015). This study aims to determine the optimum value of grinding size variations in biogas production with the solid state anaerobic digestion (SS-AD) method of biogas production from rice husk waste. We divide the method used into four stages, namely, the testing phase of total rice content, solids, preparation phase, operation phase, and results analysis. The rice husk waste used for this study came from the Rowosari area. We accept rice for preliminary treatment with chemical pretreatment (NaOH). We soaked rice husk with a concentration of 6% NaOH for 24 hours as a control variable. Milling variations used as physical pretreatment are 10 mesh, 18 mesh, 35 mesh, 60 mesh. We used bioreactors with a volume of 200 ml. We observed all biogas reactors produced every two days for ± 60 days of research. The results showed that the reactors with 10 mesh, 18 mesh, 35 mesh, 60 mesh milling variations obtained a total biogas yield of 11.688484; 9,479955; 12.50772; 19,03718 ml / grTS until the 60th day. The control reactor (without grinding variations) produced 9,084606 ml / grTS. The highest biogas production level is 60 mesh with a value, (A) 19.03718 (ml / grTS); the rate of biogas production (U) 0.2416979 (ml / gr TS.day); and the minimum time for biogas formation (λ) is 3.83908 days.
Highlights
The population continues to increase, resulting in increased energy consumption, while the source of energy produced is limited, requiring efforts to obtain renewable energy
The preliminary treatment in this research with rice husk raw material aims to improve the optimization of rice husks up to 30% [5]
Rice husk was soaked with 6% NaOH concentration for 24 hours as a control variable. 1.5 kg of rice husk is soaked in 45 liter of water
Summary
The population continues to increase, resulting in increased energy consumption, while the source of energy produced is limited, requiring efforts to obtain renewable energy. The energy crisis like fuel is one of the global issues that occur. It does not balance RFO (Refined Fuel Oil) and production with population consumption. Petroleum as a raw material for producing RFO is limited [1]. Biogas technology is an alternative solution to the problem of the energy crisis. Biogas is a flammable gas with CH4 as the major component resulting from the decomposition process of organic materials by microorganisms under anaerobic conditions. Biogas is a renewable and environment friendly fuel, making it suitable for use as one solution to energy scarcity that is happening [3]
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