TY - JOUR T1 - COMPARISON OF BACTERIAL AND YEAST ETHANOL FERMENTATION YIELD FROM JERUSALEM ARTICHOKE (HELIANTHUS TUBEROSUS L.) TUBERS PULP AND JUICES A1 - Katarzyna Szambelan A1 - Jacek Nowak A1 - Krystyna J. Chrapkowska JO - Acta Sci. Pol. Technol. Aliment VL - 3 IS - 1 SP - 45-53 Y1 - 2004 UR - https://www.food.actapol.net/volume3/issue1/5_1_2004.pdf SN - 1644-0730 KW - Jerusalem artichoke, inulin hydrolysis, bacterium, yeast, ethanol yield AB - The fermentation of Jerusalem artichoke (Helianthus tuberosus L.) tubers and juices using various microorganisms: the bacterium Zymomonas mobilis, a distillery yeast Saccharomyces cerevisiae and a yeast with inulinase activity was investigated. Jerusalem artichoke carbohydrates in mashed tubers and juices were acid and enzymatic hydrolysed before fermentation by the bacterium and a distillery yeast. Although enzymatic hydroly-sis with an inulinase gave less reducing sugars it was significantly more efficient in fer-mentation process. The ethanol yield after enzymatic hydrolysis (expressed as % theoreti-cal yield) was 78.3-90.0% and 72.4-84.2% for the bacterium and yeasts respectively in tubers as well as 78.3-88.1% and 74.4-82.2% for the bacterium and yeasts in juices. The yield was 2.0-9.2% higher than after acid hydrolysis. The yeast with an active inulinase yielded better when juices were used for fermentation than on mashed tubers. ER -