Utilization of Sago Solid Waste for Bioethanol Production With Variation of Sago Solid Waste-Solvent Ratio and Pre-treatment Time

Abstract Sago solid waste is a lignocellulosic material that can be used as raw for making bioethanol. The lignin component of lignocellulose slow saccharification by preventing cellulase enzymes from accessing cellulose. pre-treatment stage the first lignocellulose-to-bioethanol conversion process, and it to lower levels in lignocellulose. Saccharification fermentation are next processes turning was carried out this study using 10% NaOH solution at 4 bar pressure reactor temperature 140 °C, while stages were simultaneously (SSF) yeast Saccharomyces cerevisiae 30 °C pH 5. ratio sago period process varied study. solvent ratios 1:5, 1:6, 1:7, with processing times beginning 20 minutes, 40 minutes. maximum reduction results (60.11%) obtained 1:7 time highest yield mass (35.14%) 1:5 duration initial treatment then continued SSF 0 hours, 24 48 72 hours bioethanol content 12% hours.