S. cerevisiae remains the prime one
[11]. In this study, the total sugar concentration of onion
juice was 77.3 g/l; in other studies, it was found to vary
from 46.9 to 79.6 g/l [7].This showed that the examined
onion is a good source for bio-ethanol production, as ethanol
is produced by the action of microorganisms and
enzymes through the fermentation of sugars.