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Influence of alkali pretreatment on morphological structure and methane yield of Arachis hypogea shells
Biomass Conversion and Biorefinery ( IF 4 ) Pub Date : 2022-09-06 , DOI: 10.1007/s13399-022-03271-w
Kehinde O. Olatunji, Daniel M. Madyira, Noor A. Ahmed, Oyetola Ogunkunle

Optimum energy recovery and economical use of lignocellulose feedstocks required an efficient breakdown of their recalcitrance characteristics. This study investigated the alkali pretreatment of underutilized Arachis hypogea shells’ structural arrangement and methane yield. The NaOH pretreatment was carried out with 1%, 2%, 3%, and 4% (w/w), an exposure time of 45 min, 30 min, 15 min, and 10 min, respectively, at an autoclave temperature of 90 ℃. The functional groups and morphological structure of the pretreated and untreated Arachis hypogea shells were investigated with Fourier transform infrared (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) and digested in anaerobic condition at mesophilic temperature. Structural analysis results showed that NaOH pretreatment reduced cellulose crystallinity and altered the functional groups. At the same time, SEM images depicted disruption of the recalcitrant arrangement of Arachis hypogea shells. The methane yield was 217.63 ml/gVSadded, 222.33 ml/gVSadded, 256.78 ml/gVSadded, 219.61 ml/gVSadded, and 151.23 ml/gVSadded. This result showed that NaOH pretreatment improved the methane yield of Arachis hypogea shells and can be replicated at a commercial scale, and other lignocellulose feedstocks with similar structural arrangements can be considered.



中文翻译:

碱预处理对花生壳形态结构和产甲烷量的影响

木质纤维素原料的最佳能量回收和经济使用需要有效分解其顽固特性。本研究调查了未充分利用的花生壳的结构排列和甲烷产量的碱预处理。NaOH 预处理采用 1%、2%、3% 和 4% (w/w),暴露时间分别为 45 分钟、30 分钟、15 分钟和 10 分钟,高压釜温度为 90 ℃。预处理和未处理花生的官能团和形态结构用傅里叶变换红外 (FTIR)、X 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 研究贝壳,并在中温厌氧条件下消化。结构分析结果表明,NaOH 预处理降低了纤维素结晶度并改变了官能团。同时,SEM 图像描绘了花生壳的顽固排列的破坏。甲烷产量为添加217.63 ml/gVS、添加 222.33 ml/gVS 添加256.78 ml/gVS 、添加219.61 ml/gVS 和添加151.23 ml/ gVS 。该结果表明NaOH预处理提高了花生的甲烷产率。壳并且可以以商业规模复制,并且可以考虑具有类似结构布置的其他木质纤维素原料。

更新日期:2022-09-08
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