Detoxification procedures of eucalyptus hemicellulose hydrolysate for xylitol production by Candida guilliermondii

摘要: Abstract Xylitol can be obtained from hemicelullosic fraction of lignocellulosic materials containing d -xylose. A problem associated with the fermentation hemicellulosic sugars to xylitol is presence a broad range compounds, which inhibit fermenting microorganisms. These inhibitors removed hydrolysate by detoxification method, prior fermentation. This study describes different methods eucalyptus residues improve production Candida guilliermondii . The changes in concentrations fermentable and four groups inhibitory compounds were determined fermentability detoxified hydrolysates was assayed. applied include: treatment active charcoal resins (cationic anionic) sequence. Ion exchange more efficient than activated remove all major without sugar loss. ion drastically enhanced hydrolysate. Under best assayed operating conditions, 32.7 g/L achieved after 48 h fermentation, correspond 0.68 g/L h volumetric productivity 0.57 g/g yield factor. In addition, it verified that low acetic acid have benefical effect on productivity.