Pembuatan Bioetanol dari Tepung Ampas Tebu Melalui Proses Hidrolisis Termal dan Fermentasi Serta Recycle Vinasse (Pengaruh Konsentrasi Tepung Ampas Tebu, Suhu dan Waktu Hidrolisis)

Abstract

The purpose of this research are to study the effect of sugarcane bagasse powder concentration, hydrolysis temperature and time on the %yield of glucose produced and the level of glucose by recycle vinasse process. glucose by the level of glucose from recycling vinasse as the raw material. Raw sugarcane bagasse as primary material was obtained from sugarcane juice shop. Observed variabels were concentration of sugarcane bagasse in aquadest, hydrolysis time and temperature. Sugarcane bagasse is powdered by blender and then mixed with aquadest (2,94; 3,85; 4,76%) and hydrolized in the hydrolysis tank. The hydrolysis process occurs at time (1, 1,5 and 2 hours) and temperature 135, 150 and 165°C. And then, the hydrolysis product is tested for its glucose, lignin and cellulose composition. After that, the product is fermented in order to produce bioethanol. Result shows that % yield of glucose increases as the escalation of sugarcane bagasse powder concentration, hydrolysis time and temperature. But, % yield of glucose increases from 1 until 1,5 hour of hydrolysis time and then decreases from 1,5 to 2 hour of hydrolysis time. The highest %yield of glucose obtained at concentration 2,94%, 165 °C and 2 hours of hydrolysis time. Beside that, lignin and cellulose level fluctuated as the increasing of hydrolysis temperature. This could be caused of the non-uniform composition of the raw materials.