Abstract The purple sweet potato starch was the only carbohydrate component that converted to its monomeric sugar during conventional saccharification process, while fiber remained because α-amylase and amyloglucosidase act on α-1,4 α-1,6 glycosidic bonds in starch. To overcome this, xylanase mannanase are used convert hemicellulose sugars. optimal conditions process must be known achieve liqui...