Optimization of Ultrasound-enhanced Subcritical Water Hydrolysis of Oil Palm Empty Fruit Bunch for the Production of Fermentable Sugar

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-05-21 DOI:10.3311/ppch.23183

Ningsi Lick Sangadji, Candra Wijaya, H. Sangian, A. Widjaja

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Abstract

To enhance the hydrolysis to produce fermentable sugar, oil palm empty fruit bunch (OPEFB) has undergone ultrasonication pretreatment prior to subjection to subcritical water hydrolysis. This work aims to optimize the effect of temperature, reaction time, and the concentration of sodium dodecyl sulfate (SDS) as the surfactant, with the primary aim of maximizing sugar production in the subcritical water hydrolysis process applied to oil palm empty fruit bunch (OPEFB). The pretreatment process conditions were optimized using response surface methodology of the central composite design (RSM–CCD). The experimental design includes three factors and levels, with a range of 180–220 °C temperature (X1), 60–80 minutes process time (X2), and 1–5% w/w SDS concentration (X3), an α value of 1.68, and reducing sugar concentration (g/L) as response (Y1). The optimum condition for subcritical water hydrolysis of OPEFB was obtained at 208 °C, 78 minutes, and 2.6% w/w SDS concentration with an expected yield of 6.09 g/L. As a result, reducing sugar produced by enzymatic hydrolysis increased by 324.7% compared to raw OPEFB, with sugar yield of 45.64% after 36 hours. Along these, changes in crystallinity, chemical composition, lignocellulosic functional groups, and morphology were analyzed to determine the impact of the pre-treatment on OPEFB.

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超声波强化亚临界水水解油棕空果束生产发酵糖的优化研究

为了加强水解以生产可发酵糖，油棕空果束（OPEFB）在亚临界水水解前进行了超声波预处理。这项研究旨在优化温度、反应时间和作为表面活性剂的十二烷基硫酸钠（SDS）浓度的影响，主要目的是最大限度地提高油棕空果束（OPEFB）亚临界水水解工艺的产糖量。采用中心复合设计响应面法（RSM-CCD）对预处理工艺条件进行了优化。实验设计包括三个因子和水平，温度范围为 180-220 °C (X1)，工艺时间为 60-80 分钟 (X2)，SDS 浓度为 1-5% w/w (X3)，α 值为 1.68，还原糖浓度 (g/L) 为响应 (Y1)。OPEFB 亚临界水水解的最佳条件为 208 ℃、78 分钟和 2.6% w/w SDS 浓度，预期产率为 6.09 g/L。因此，与未加工的 OPEFB 相比，酶水解产生的还原糖增加了 324.7%，36 小时后的糖产量为 45.64%。此外，还分析了结晶度、化学成分、木质纤维素官能团和形态的变化，以确定预处理对 OPEFB 的影响。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.