Optimization of pretreatment of corn (Zea mays L.) cob 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

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Abstract

The optimization of the dilute sulfuric acid pretreatment of corn cob was conducted prior to enzymatic for ethanol production. the pretreatment parameters considered were temperature (°C ), H₂SO₄ concentration (% w/w) and reaction time (min) while the response variables were the reducing sugar yields and the total sugar yields. The detection of curvature in a space bounded by the parameter levels was done first using the Three-Factor Interaction (3FI) Design. It was followed by the actual determination of optimum condition and the estimation of response surface in the space where curvature was detected using the Box-Behnken Design (BBD). The optimum conditions determined is at temperature of 166.53°C, H₂SO₄ concentration of 2.04% and reaction time 15.60 min. At optimum condition, the predicted reducing sugar yield and total sugar yield were 25.5593 mg/mL and 30.7489 mg/mL, respectively. The contour plots and 3D graphs of different parameter interactions were used to describe the effect of each parameter to reducing sugar yield. The total sugar yield was not considered due to the significant lack-of-fit. Increase and/or decrease in the levels of the three parameters would result to the decrease of reducing sugar yield.

Language

English

LC Subject

Corn industry, Corn--Economic aspects, Biofuels

Location

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

Call Number

LG 993.5 2011 E62 H47

Document Type

Thesis

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