Pretreatment of sugarcane bagasse by sequential ammonium hydroxide impregnation and steam explosion for biofuel ethanol production
Date
12-2014
Degree
Bachelor of Science in Chemical Engineering
Major Course
Major in Sugar Technology
College
College of Engineering and Agro-Industrial Technology (CEAT)
Adviser/Committee Chair
Catalino G. Alfafara
Restrictions
Restricted: Not available to the general public. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.
Abstract
This study investigated the pretreatment of sugarcane bagasse by sequential ammonium hydroxide (NH4OH) impregnation and steam explosion A factorial experiment was used to identify significant impregnation factors (NH4OH) concentration, contact time, temperature and solid-to-liquid ratio) affecting the response variable (reducing sugar yield, RSY). Statistical analyses showed that temperature and contact time were significant impregnation factors, but were not optimized due to safety and experimental set-up constraints. Response surface method was used to maximize the RSY from steam explosion. The factors optimized were (1) steam temperature and (2) contact time. Statistical analysis showed that a quadratic model best fitted the data. The model was significant, the lack of fit was desirably insignificant, the lack of fit was desirably insignificant, and the regression coefficients R2) were in reasonable agreement. Numerical optimization for steam explosion gave the following optimum condition: 176.37 degree and (2) 279.40 s with predicted RSY value of 33.83%. Experimental verification of the optimum condition gave an RSY value if 31.46% w/w which was close to the predicted value. Fermentation of the optimally impregnated-steam exploded bagasse resulted to a 60.89% glucose-to-ethanol conversion and a final ethanol yield of 0.41% v/v.
Language
English
Location
UPLB College of Engineering and Agro-Industrial Technology (CEAT)
Call Number
LG 993.5 2014 E62 /F35
Recommended Citation
Fajil, Delegene F., "Pretreatment of sugarcane bagasse by sequential ammonium hydroxide impregnation and steam explosion for biofuel ethanol production" (2014). Undergraduate Theses. 3852.
https://www.ukdr.uplb.edu.ph/etd-undergrad/3852
Document Type
Thesis