Elucidating the Correlation of Lignocellulosic Compositions and Physicochemical Alterations in Oil Palm (Elaeis guineensis) Biomass on Enzymatic Saccharification Yield

IF 3.1 3区工程技术 Q3 ENERGY & FUELS

BioEnergy Research Pub Date : 2024-05-08 DOI:10.1007/s12155-024-10762-3

Tannimalay Hemashini, Chee Keong Lee, Choon Fu Goh, Ying Ying Tye, Maya Ismayati, Yin Ying H’ng, Cheu Peng Leh

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Abstract

This study investigates the correlation between both the chemical compositions and physicochemical properties of pretreated oil palm empty fruit bunch (OPEFB) fibre and their enzymatic saccharification/total glucose yield (TGY). Twenty OPEFB samples, pretreated with various aqueous pretreatments, with diverse cellulose (25.63–44.23%), hemicellulose (0.01–42.49%), and lignin (3.7–47.1%) levels, were examined for their correlation with TGY (8.5–40%). The quadratic regression model was verified significant (p-value = 0.0006, R² = 0.8006). It was found that the pre-refined OPEFB experienced greater cellulose loss (35%) compared to unrefined ones (9%), adversely affecting TGY. Among physicochemical properties analysed using SEM, FTIR, XRD, Py-GCMS, and XPS, only crystallinity index (CrI) was significantly correlated with TGY based on theoretical glucose concentration (TGC) (R² = 0.77, 0.91). Other characteristics (morphology, functional groups, crystallite size, S/G ratio, and O/C ratio) exhibited no significant correlation to saccharification efficiency, exhibiting random trends (R² < 0.5). OPEFB fibres with CrI of 30–40 could achieve 100% TGY based on TGC. In conclusion, regardless of pretreatments, chemical compositions predominantly affected TGY in the enzymatic saccharification of biomass. Among commonly used physicochemical analytical methods, CrI is most significant in this evaluation and OPEFB should be unrefined before treatment to avoid cellulose loss.

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阐明油棕（Elaeis guineensis）生物质中木质纤维素成分和物理化学变化对酶糖化产量的相关性

本研究调查了经预处理的油棕空果束（OPEFB）纤维的化学成分和理化性质与其酶糖化/总葡萄糖产量（TGY）之间的相关性。20 个 OPEFB 样品经过各种水预处理，纤维素（25.63%-44.23%）、半纤维素（0.01%-42.49%）和木质素（3.7%-47.1%）含量各不相同，研究了它们与 TGY（8.5%-40%）的相关性。经验证，二次回归模型具有显著性（p 值 = 0.0006，R2 = 0.8006）。研究发现，与未精制的 OPEFB（9%）相比，预精制的 OPEFB 纤维素损失更大（35%），对 TGY 产生了不利影响。在使用 SEM、FTIR、XRD、Py-GCMS 和 XPS 分析的理化特性中，只有结晶度指数（CrI）与基于理论葡萄糖浓度（TGC）的 TGY 显著相关（R2 = 0.77，0.91）。其他特征（形态、官能团、晶粒大小、S/G 比和 O/C 比）与糖化效率无明显相关性，呈现随机趋势（R2 < 0.5）。根据 TGC，CrI 为 30-40 的 OPEFB 纤维可实现 100% 的 TGY。总之，在生物质的酶法糖化过程中，无论进行何种预处理，化学成分都会对 TGY 产生主要影响。在常用的理化分析方法中，CrI 在这一评估中的作用最大，OPEFB 在处理前应未经精制，以避免纤维素损失。

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来源期刊

BioEnergy Research ENERGY & FUELS-ENVIRONMENTAL SCIENCES

CiteScore

6.70

自引率

8.30%

发文量

174

审稿时长

3 months

期刊介绍： BioEnergy Research fills a void in the rapidly growing area of feedstock biology research related to biomass, biofuels, and bioenergy. The journal publishes a wide range of articles, including peer-reviewed scientific research, reviews, perspectives and commentary, industry news, and government policy updates. Its coverage brings together a uniquely broad combination of disciplines with a common focus on feedstock biology and science, related to biomass, biofeedstock, and bioenergy production.