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首页> 外文期刊>International journal of green energy >BIOCONVERSION OF HEMICELLULOSIC FRACTION OF PERENNIAL KANS GRASS (SACCHARUM SPONTANEUM) BIOMASS TO ETHANOL BY PICHIA STIPITIS: A KINETIC STUDY
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BIOCONVERSION OF HEMICELLULOSIC FRACTION OF PERENNIAL KANS GRASS (SACCHARUM SPONTANEUM) BIOMASS TO ETHANOL BY PICHIA STIPITIS: A KINETIC STUDY

机译：皮氏针虫将多年生甘蔗生物的半纤维素馏分生物转化为乙醇的运动学研究

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摘要

Ethanol is a promising alternative energy source for the limited crude oil and can be produced from abundantly available lignocellulosic biomass. Utilization of acid hydrolysate of Kans grass (Saccharμm spontaneum), a perennial grass native to South Asia, has been investigated for ethanol production. The dilute acid treatment was applied to hydrolyze the Kans grass biomass for releasing maximum hemicellulosic sugars. The aim of this work was to develop a fermentative system utilizing Kans grass hemicellulose acid hydrolysate as a substrate for ethanol production by Pichia stipitis. It was found that 74% of xylose was converted to ethanol with a yield of 0.429 g_p g_s~(-1) and productivity of 0.231 g_p t~(-1) h~(-1). The appropriate mathematical models for cell and ethanol production rate have been developed to explain theoretically the bioconversion of Kans grass hemicellulose acid hydrolysate to ethanol and validated statistically with the experimental results carried out in the laboratory. The present study revealed that the degradation of sugar, activation and inhibition of cells, and ethanol production were strictly coupled during the bioconversion process of hemicellulosic fraction of Kans grass to ethanol.
机译：乙醇是有限原油的一种有前途的替代能源，可以由大量可用的木质纤维素生物质生产。已研究利用南亚本地多年生多年生禾草Kans草（Saccharμmspontaneum）的酸性水解物生产乙醇。稀酸处理被用于水解坎斯草生物量以释放最大的半纤维素糖。这项工作的目的是开发一种利用堪萨斯草半纤维素酸水解产物为底泥毕赤酵母生产乙醇的发酵系统。发现74％的木糖被转化为乙醇，产率为0.429g_p g_s·（-1），产率为0.231g_p t _（-1）·h-1（-1）。已经开发了用于细胞和乙醇生产速率的适当数学模型，以从理论上解释堪萨斯草半纤维素酸水解物向乙醇的生物转化，并在实验室进行的实验结果进行了统计验证。本研究表明，在堪萨斯草的半纤维素级分向乙醇的生物转化过程中，糖的降解，细胞的活化和抑制以及乙醇的产生是严格耦合的。

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