Moderate pretreatment of oil palm empty fruit bunches for optimal production of xylitol via enzymatic hydrolysis and fermentation

Harahap, Budi Mandra; Kresnowati, Made Tri Ari Penia

doi:10.1007/s13399-017-0299-x

Cited by 17 publications

(14 citation statements)

References 54 publications

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“…These processes may also require plenty of chemicals for pH adjustment for the following process. As an alternative, enzymatic hydrolysis has also been suggested [14][15][16]. Although it is relatively slow, the process can be carried out at a moderate operation condition.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Simultaneous Saccharification and Fermentation of Oil Palm Empty Fruit Bunches for Xylitol Production

Burhan

Kresnowati

Setiadi

2019

Bull. Chem. React. Eng. Catal.

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The biological process route of xylitol production from lignocellulosic materials, via enzymatic hydrolysis which is followed by fermentation, offers a more sustainable or greener process than the chemical process route. Both the enzymatic hydrolysis and the fermentation processes are conducted at moderate process condition and thus require less energy and chemicals. However, the process proceeds slower than the chemical one. In order to improve process performance, the enzymatic hydrolysis and the fermentation processes can be integrated as Simultaneous Saccharification and Fermentation (SSF) configuration. This paper discusses the evaluation of SSF configuration on xylitol production from Oil Palm Empty Fruit Bunches (OPEFB). To integrate two processes which have different optimum temperature, the performance of each process at various temperature was first evaluated. Later, SSF was evaluated at various hydrolysis and fermentation time at each optimum temperature. SSF showed better process performance than the separated hydrolysis and fermentation processes. The best result was obtained from configuration with 72 hours of prior hydrolysis followed by simultaneous hydrolysis and fermentation, giving yield of 0.08 g-xylitol/g-OPEFB. Copyright © 2019 BCREC Group. All rights reserved

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Section: Introductionmentioning

confidence: 99%

Evaluation of Simultaneous Saccharification and Fermentation of Oil Palm Empty Fruit Bunches for Xylitol Production

Burhan

Kresnowati

Setiadi

2019

Bull. Chem. React. Eng. Catal.

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“…A further increase in xylose recovery was reported to be less important as time prolonged further. Extending the hydrothermal pretreatment time of OPEFB at 127.9 • C from 60 to 90 min was reported not to give a considerable increase in xylose recovery [23]. A similar report on OPEFB hydrothermal pretreatment showed that a longer pretreatment time resulted in a lower sugar recovery [44].…”

Section: Discussionmentioning

confidence: 99%

“…Another method is the organosolv pretreatment, which partially hydrolyzes the lignin bond with cellulose and hemicellulose, but most of the hemicellulose is solubilized [21,22]. The milder process involves using a hydrothermal process such as that used on OPEFB [23], prairie cordgrass [24], hardwood [25], and seeds of Euterpe oleracea [26].…”

Section: Introductionmentioning

confidence: 99%

“…Acid pretreatment produces an inhibitory substance, as seen in xylitol fermentation using wild strain yeast, which will need detoxification to reduce toxicity [27][28][29]. Alkaline pretreatment is better than acid pretreatment in sugar production, but it requires pH adjustment for the following fermentation process to produce xylitol [23]. The hydrothermal process is a mild process, but the process conditions such as temperature need to be set in order to obtain optimum xylose recovery.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Xylose Recovery in Oil Palm Empty Fruit Bunches for Xylitol Production

et al. 2020

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The hardest obstacle to make use of lignocellulosic biomass by using green technology is the existence of lignin. It can hinder enzyme reactions with cellulose or hemicellulose as a substrate. Oil palm empty fruit bunches (OPEFBs) consist of hemicellulose with xylan as the main component. Xylitol production via fermentation could use this xylan since it can be converted into xylose. Several pretreatment processes were explored to increase sugar recovery from lignocellulosic biomass. Considering that hemicellulose is more susceptible to heat than cellulose, the hydrothermal process was applied to OPEFB before it was hydrolyzed enzymatically. The purpose of this study was to investigate the effect of temperature, solid loading, and pretreatment time on the OPEFB hydrothermal process. The xylose concentration in OPEFB hydrolysate was analyzed using high-performance liquid chromatography (HPLC). The results indicated that temperature was more important than pretreatment time and solid loading for OPEFB sugar recovery. The optimum temperature, solid loading, and pretreatment time for maximum xylose recovery from pretreated OPEFB were 165 °C, 7%, and 60 min, respectively, giving a xylose recovery of 0.061 g/g of pretreated OPEFB (35% of OPEFB xylan was recovered).

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“…4.a and 4.b showed that the increase of sugar recovery is affected by time although not significantly. As a comparison, OPEFB which was pre-treated using the hydrothermal process at 127.9C for 60 and 90 minutes did not give a significant rise of xylose recovery [31].…”

Section: Time Effectsmentioning

confidence: 94%

Temperature, Solid Loading and Time Effects on Recovery of Sugar from OPEFB

2018

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Abstract. Biorefinery industry used lignocellulosic biomass as the raw material. Oil Palm Empty Fruit Bunch (OPEFB) is one of Indonesian potential lignocellulosic biomass, which consists of hemicellulose with xylan as the main component. Xylitol production via fermentation could use this xylan since it can be converted into xylose. However, the structure of OPEFB is such that hemicellulose is protected in a way that will hinder hydrolysis enzyme to access it. Considering that hemicellulose is more susceptible to heat than cellulose, a hydrothermal process was applied to pre-treat OPEFB before it was hydrolyzed enzymatically. The aim of the research is to map the effect of temperature, solid loading and time of pre-treatment process to obtain and recover as much as possible accessible hemicellulose from OPEFB. The results showed that temperature gave more significant effect than time and solid loading for glucose recovery of OPEFB residues. While xylose recovery varies greatly with temperature, but solid loading and time gave less significant effect.

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Moderate pretreatment of oil palm empty fruit bunches for optimal production of xylitol via enzymatic hydrolysis and fermentation

Cited by 17 publications

References 54 publications

Evaluation of Simultaneous Saccharification and Fermentation of Oil Palm Empty Fruit Bunches for Xylitol Production

Evaluation of Simultaneous Saccharification and Fermentation of Oil Palm Empty Fruit Bunches for Xylitol Production

Optimization of Xylose Recovery in Oil Palm Empty Fruit Bunches for Xylitol Production

Temperature, Solid Loading and Time Effects on Recovery of Sugar from OPEFB

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