Abstract The present study focuses on the biorefinery approach of integrated production of bioethanol and biodiesel from microalgae feedstock. Various pretreatment methods were used to determine the maximum recovery of sugars from Scenedesmus sp. The total sugar yield of 93% was obtained when the biomass was pretreated by acid hydrolysis. The hydrolysate produced 86% of ethanol (theoretical yield) after the fermentation using Saccharomyces cerevisiae . Enzyme catalyzed direct transesterification of the biomass was performed using dimethyl carbonate as a solvent and the maximum yield of 92% methyl ester, 1.86% glycerol carbonate and 4.93% glycerol dicarbonate was achieved. The integrated process of bioethanol and biodiesel production was optimally achieved when direct transesterification was done first followed by ethanol fermentation yielding 92 and 93% of methyl ester and ethanol, respectively.

中文翻译：

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利用微藻原料同时生产生物乙醇和生物柴油

摘要 本研究的重点是从微藻原料中综合生产生物乙醇和生物柴油的生物精炼方法。使用各种预处理方法来确定来自栅藻属的糖的最大回收率。生物质经酸水解预处理后，总糖收率为93%。使用酿酒酵母发酵后，水解产物产生 86% 的乙醇（理论产率）。使用碳酸二甲酯作为溶剂进行生物质的酶催化直接酯交换，最高产率为 92% 的甲酯、1.86% 的碳酸甘油酯和 4.93% 的碳酸甘油酯。