Production of ethanol from sweet sorghum bagasse pretreated with different chemical and physical processes and saccharified with fiber degrading enzymes

► Enzymatic hydrolysis achieved 50% of total sugars in untreated sorghum bagasse. ► The extrusion treatment did not generate inhibitors. ► The enzymatic hydrolysis improved 30% the sugar yields in acid hydrolysates. ► The Saccharomyces cerevisiae and Issatchenkia orientalis had good ethanol yields after 24 h. ► The S. cerevisiae and I. orientalis reduced inhibitors during fermentation.