2 A vinegar prepared from purple sweet potato using two step fermentation and a method for preparing thereof

摘要

PURPOSE: Vinegar prepared using a purple sweet potato by two-stage fermentation and a method for preparing the same are provided. Therefore, a filtration yield after fermentation is increased by using enzyme and yeast as potato alcohol fermenting agents.. CONSTITUTION: A method for preparing vinegar using a purple sweet potato comprises the steps of: peeling or roasting raw potatoes containing 10 to 50 wt.% of Ipomoea batatas (L.) Lamk; adding side ingredients such as unpolished rice and fermenting agents into the pre-treated potatoes and alcohol-fermenting the mixture at 30 to 35 deg. C and pH 5.0; and inoculating an acetic acid fermenting microorganism into the alcohol fermented mixture and acetic acid-fermenting the mixture, wherein the fermenting agents include liquefying enzyme and saccharifying enzyme.