Semibatch ethanol production from starch by simultaneous saccharification and fermentation using cell recycle = 균체재순환 및 동시당화발효에 의한 전분으로 부터의 반회분식 에탄올 발효

Abstract

In order to develop economic processes for ethanol production from starch, a simultaneous saccharifica ion and fermentation(SSF) process using Zymomonas mobilis and amyloglucosidase (AMG) wa; studied in semibatch modes using cell recycle. The cell recycle was carried out by adopting tv o different methods ； microfiltration and settling. The cell recycle using microfiltration reveal* d higher productivity(5.4 g/1 / h) than that using a settler(4.3 푠/1 / h 乂 Taking the large-s< ale ethanol fermentation into account, the semibatch process using microfiltration system app"ared most promising among others with respect to ethanol productivity, feasibility of scale-up and simplification of operation.