Scale‐up batch fermentation of bioethanol production from the dry powder of Jerusalem artichoke ( Helianthus tuberosus L.) tubers by recombinant Saccharomyces cerevisiae

This study is a first exploration of industrial bioethanol production from the dry powder of Jerusalem artichoke ( Helianthus tuberosus L.) tubers by recombinant S . cerevisiae 6525. Scale‐up fermentation of bioethanol production from the dry powder of Jerusalem artichoke tubers by recombinant Saccharomyces cerevisiae 6525 was carried out at the scale of 50 and 500 L agitating fermentors. For the 50 L fermentor, 85.67 g/L of ethanol was obtained within 72 h of fermentation, and the ethanol yield was 90.1%. For the 500 L fermentor, the highest ethanol concentration of 77.00 g/L was achieved at 84 h, and the ethanol yield was 81.01%. These results indicated that a relatively high yield of ethanol could also be obtained from a scaled‐up fermentation of Jerusalem artichoke powder. Thus, it may be feasible to use a Jerusalem artichoke tuber feedstock to carry out ethanol fermentations using the recombinant S . cerevisiae 6525 for industrial production. Copyright © 2016 The Institute of Brewing & Distilling