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Production of xylooligosaccharides and fermentable sugars from oil palm mesocarp fiber by subcritical H₂O - CO₂ pretreatment


Citation

Ahmad, Norlailiza (2018) Production of xylooligosaccharides and fermentable sugars from oil palm mesocarp fiber by subcritical H₂O - CO₂ pretreatment. Masters thesis, Universiti Putra Malaysia.

Abstract / Synopsis

Oil palm mesocarp fiber (OPMF) generated from oil palm processing is available abundantly and improper handling of OPMF has lead to serious pollution. High content of carbohydrate polymer in OPMF serves as feedstock for fermentable sugars production with appropriate pretreatments. The present works aimed to investigate xylooligosaccharide (XOs) and fermentable sugar production from OPMF in subcritical H2O-CO2 pretreatment at a temperature range of 150- 200°C and 20-60 min with pressure vary from 3-5 MPa. The pretreated solids and liquids from this process were separated by filtration and characterized. XOs, monomeric sugars, acids, furans and phenols in pretreated liquids were analyzed by using HPLC. XOs with a degree of polymerization DP X2-X4 which is xylobiose, xylotriose, xylotetraose were analysed by using HPAECPAD. Enzymatic hydrolysis was performed on cellulose-rich pretreated solids to study the xylose and glucose production. Morphological changes of pretreated solids were analyzed by SEM, WAXD and BET surface area. An optimal condition for XOs production was obtained at 180°C, 60 min, 3 MPa with a concentration of 81.60 mg/g which corresponded to 36.59% of XOs yield from xylan. On the other hand, the highest xylose and glucose yields obtained from conversion of hemicellulose and cellulose were 29.96% and 84.65%, respectively at cellulase loadings of 10 FPU/g-substrate. The results obtained clearly indicated that OPMF was a potential material for XOs and fermentable sugar production using subcritical H2O-CO2 method.


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Additional Metadata

Item Type: Thesis (Masters)
Subject: Oil palm - Case studies
Subject: Sugars - Analysis
Subject: Fiber plants
Call Number: FBSB 2018 39
Chairman Supervisor: Mohd Rafein Zakaria, PhD
Divisions: Faculty of Biotechnology and Biomolecular Sciences
Depositing User: Mas Norain Hashim
Date Deposited: 27 Nov 2019 09:04
Last Modified: 27 Nov 2019 09:04
URI: http://psasir.upm.edu.my/id/eprint/75638
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