Optimization of pretreatment of rice (Oryza sativa) straw prior to enzymatic saccharification for ethanol production

Date

4-2011

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Jovita L. Movillion

Committee Member

Denise Ester O. Santiago

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Abstract

Rice straw is an abundant lignocellulosic material. It is an attractive raw material for ethanol production. As a lignocellulosic material, it should undergo pretreatment for their sugars to be accessible for hydrolysis and fermentation. In this study, optimization of the dilute sulfuric acid pretreatment in an oil bath of rice (Oryza sativa) straw was done. Using Box-Behnken design of the experiment, pretreatment parameters namely oil bath temperature, sulfuric acid concentration, and reaction time were optimized. The response variables used were total sugar yield and reducing sugar yield. Based on these responses, the optimum conditions were found to be at the oil bath temperature of 163.61°C, reaction time of 16.17 minutes, and H2SO4 concentration of 1.50% (v/v). At this optimum condition, the predicted total sugar yield from these conditions is 39.6837 mg/mL while the predicted reducing sugar yield is 32.6474 mg/mL. Maximum sugar yield and ethanol yield at the optimum condition is calculated to be 97.94% and 82.92%. It is shown that the ethanol production from the predicted optimum condition is efficient.

Language

English

LC Subject

Biofuels, Rice--Residues--Utilization

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2011 E62 H68

Document Type

Thesis

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