Estimasi Teoretis Perolehan Bioetanol dari Hidrolisis Tandan Kosong Kelapa Sawit (TKS) Menggunakan Asam Encer
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As one of the biggest producer of palm oil in the world, Indonesia should consider the impact of Palm Oil Mill (POM) activity to the environment. Palm Oil’s Empty Fruit Bunch (PEFB) is solid waste that is disposed by POM while producing CPO. PEFB’s compound consist of cellulose (45.95%), hemicelluloses (22.84%), lignins (16.49%), ash (1.23%), nitrogen (0.53%) and oil (2.41%). Those cellulose fraction shows the potency of PEFB as non food raw material of bioethanol production. Bioethanol from PEFB was produce through two stage hydrolysis process utilizing sulfuric acid with concentration of 0.5%, each processes occurs at 160oC and 190oC. Those hydrolysis followed by fermentation of glucose using yeast Saccharomyces cereviciae to produce bioethanol.From theoretical estimation, it is expected that 1 g glucose will produce 0.51 g bioethanol. Meanwhile, laboratory experiment informed different performance. Fermentation of hydrolysate from both proceess for 24 hour produced higher bioethanol yield compare with theoretical estimation. Bioethanol produced from fermentation of each hydrolysate was quite the same of concentration and ethanol yield. Bioethanol concentration of each fermentation was 25 g/l with ethanol yield of 0.15 g/g PEFB or for over all process, 1 kg PEFB will yield of 300 g bioethanol respectively. It is very promising in the future to overcome the problem of energy crisis in Indonesia since palm oil tree as renewable natural resources are available from many plantation.