Population growth in Indonesia is directly linked to energy consumption and environmental waste production, including organic waste. Abundant organic waste must be exploited to develop alternative energy sources that can fulfil the needs of the community, such as biogas production. This study intends to investigate the potential of the fungus Aspergillus flavus in the pretreatment of bagasse as a mix for biogas production. The biological pretreatment technique for bagasse substrate with the influence of fermentation time and concentration is implemented as a substrate combination for biogas production between bagasse and cow dung. The results indicated that the highest biogas pressure occurred after 48 h of fermentation at a concentration of 40% (T1F3) of 1.00230 atm, while the lowest pressure occurred after 192 h of fermentation at a concentration of 0% (T4F1) of 1.00123 atm. The maximum amount of biogas was produced after 48 h of fermentation, when the concentration reached 40% (T1F3) and the volume reached 0.68 cm3. The lowest number of biogas was produced after 192 h of fermentation, when the concentration was 0% (T4F1) and the volume was 0.37 cm3. Based on the research, it can be concluded that the addition of organic waste, including bagasse and the pre-treatment process with Aspergillus flavus, can increase biogas production by around 40%. The long-term goal of this research is to find a mold formula that can increase biogas production, especially biogas production that uses more organic material.
Biogas, Aspergillus flavus, pretreatment, bagasse
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