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首页> 外文期刊>Bioprocess and Biosystems Engineering >Ethanol production of semi-simultaneous saccharification and fermentation from mixture of cotton gin waste and recycled paper sludge
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Ethanol production of semi-simultaneous saccharification and fermentation from mixture of cotton gin waste and recycled paper sludge

机译：从棉gin废料和再生纸污泥的混合物中同时进行糖化和发酵的乙醇生产

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Ethanol production from the steam-exploded mixture of 75% cotton gin waste and 25% recycled paper sludge in various conditions was investigated by semi-simultaneous saccharification and fermentation (SSSF) consisting of a pre-hydrolysis and a simultaneous saccharification and fermentation (SSF). Four cases were studied: 24-h pre-hydrolysis + 48-h SSF (SSSF 24), 12-h pre-hydrolysis + 60-h SSF (SSSF 12), 72-h SSF, and 48-h hydrolysis + 24-h fermentation (SHF). The ethanol concentration, yield, and productivity of SSSF 24 were higher than those of the other operations. A model of SSF was used to simulate the data for four components in SSF. The analysis of the reaction rates of cellobiose, glucose, cell, and ethanol using the model and the parameters from the experiments showed that there was a transition point of the rate-controlling step at which the cell growth control in the initial 2 h was changed to the cellobiose reaction control in later period during ethanol production of SSF from the mixture.
机译：通过半同步糖化和发酵（SSSF）（包括预水解和同时糖化和发酵（SSF）），研究了在各种条件下由75％的轧棉废料和25％的再生纸污泥的蒸汽爆炸混合物产生的乙醇。研究了4种情况：24小时预水解+ 48小时SSF（SSSF 24），12小时预水解+ 60小时SSF（SSSF 12），72小时SSF和48小时水解+ 24- h发酵（SHF）。 SSSF 24的乙醇浓度，产率和生产率均高于其他操作。 SSF模型用于模拟SSF中四个组件的数据。使用模型和实验参数对纤维二糖，葡萄糖，细胞和乙醇的反应速率进行分析，结果表明在速率控制步骤中存在一个过渡点，在最初的2 h中，细胞生长控制发生了变化在混合物由乙醇生产SSF的后期，纤维二糖的反应控制得到了改善。

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