Co-fermentation of cassava waste pulp hydrolysate with molasses to ethanol for economic optimization

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• 作者：Thippawan Wattanagonniyom ; Wen-Chien Lee ; Vasana Tolieng…
• 关键词：Cassava waste pulp ; Co ; fermentation ; Molasses ; Ethanol ; Saccharomyces cerevisiae
• 刊名：Annals of Microbiology
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：67
• 期：2
• 页码：157-163
• 全文大小：
• 刊物主题：Microbiology; Microbial Genetics and Genomics; Microbial Ecology; Mycology; Medical Microbiology; Applied Microbiology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1869-2044
• 卷排序：67

文摘

Cassava waste pulp (CWP)–enzymatic hydrolysate was co-fermented with molasses (CWP-EH/molasses mixture) with the aim to optimize ethanol production by Saccharomyces cerevisiae TISTR 5606 (SC 90). The optimal fermentation conditions for ethanol production using this mixture were 245 g/L initial total sugar supplemented with KH₂PO₄ (8 g/L), at 30 °C for 48 h of fermentation under an oxygen-limited condition with agitation at 100 rpm, producing an ethanol concentration of 70.60 g/L (0.31 g ethanol/g total sugar). The addition of cassava tuber fiber (solid residue of CWP after enzymatic hydrolysis) at 30 g/L dry weight to the CWP-EH/molasses mixture increased ethanol production to 74.36 g/L (0.32 g ethanol/g total sugar). Co-fermentation of CWP-EH with molasses had the advantage of not requiring any supplementation of the fermentation mixture with reduced nitrogen.