title: Starch saccharification and fermentation of uncooked sweet potato roots for fuel ethanol production.
abstract: An energy-saving ethanol fermentation technology was developed using uncooked fresh sweet potato as raw material. A mutant strain of Aspergillus niger isolated from mildewed sweet potato was used to produce abundant raw starch saccharification enzymes for treating uncooked sweet potato storage roots. The viscosity of the fermentation paste of uncooked sweet potato roots was lower than that of the cooked roots. The ethanol fermentation was carried out by Zymomonas mobilis, and 14.4 g of ethanol (87.2% of the theoretical yield) was produced from 100g of fresh sweet potato storage roots. Based on this method, an energy-saving, high efficient and environment-friendly technology can be developed for large-scale production of fuel ethanol from sweet potato roots.
authors.affiliation: School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Caifa
authors.initials: C
authors.lastname: Chen
authors.forename: Yanhu
authors.initials: Y
authors.lastname: Shen
authors.forename: Tielin
authors.initials: T
authors.lastname: Ding
authors.forename: Daifu
authors.initials: D
authors.lastname: Ma
authors.forename: Zichun
authors.initials: Z
authors.lastname: Hua
authors.forename: Dongxu
authors.initials: D
authors.lastname: Sun
mesh_terms: D001234:Aspergillus niger / Q000378:metabolism*; D056804:Biofuels / Q000382:microbiology; D002241:Carbohydrates / Q000096:biosynthesis*; D003296:Cooking; D000431:Ethanol / Q000302:isolation & purification / Q000378:metabolism*; D005285:Fermentation; D027723:Ipomoea batatas / Q000382:microbiology*; D018517:Plant Roots / Q000382:microbiology*; D013213:Starch / Q000378:metabolism*; D017355:Zymomonas / Q000378:metabolism*
chemical_list: D056804:Biofuels; D002241:Carbohydrates; D000431:Ethanol; D013213:Starch