Bioethanol Production from Jerusalem Artichoke Stalks

I. Ballesteros, P. Manzanares, M.J. Negro, J.M. Oliva, F. Sáez & M. Ballesteros
In this work ethanol production from soluble and structural carbohydrates present in the stalks of Jerusalem artichoke was tested. The soluble sugars were extracted with water in a column system at 60ºC, solid­liquid ratio (1/3) and residence time of 20 minutes. In these conditions an extraction efficiency of 74% was obtained, corresponding to 91,7 g/L sugars concentration. Direct fermentation of liquid using Kluyveromyces marxianus CECT 10875, yielded 34.5 g/L ethanol concentration (0.38 ethanol yield) in...