Optimization of pH and acetic acid concentration for bioconversion of hemicellulose from corncobs to xylitol by Candida tropicalis

Interaction Effects of pH and Inhibitors in Oil Palm Frond (OPF) Hemicelullosic Hydrolysate on Xylitol Production: A Statistical Study

“…26 The high pH condition was preferable to lower the undissociated form of acetic acid and eventually inhibit the acetate formation and reduce the inhibition of acetic acid on microbial growth. 23,38 Silva et al 39 reported similar evidence explaining the effect of pH and acetic acid on xylitol yields. In addition, Cheng et al 38 found that xylose consumption using C. tropicalis W103 strain was not affected by acetic acid when its concentration was lower than 2 g/L.…”

“…23,38 Silva et al 39 reported similar evidence explaining the effect of pH and acetic acid on xylitol yields. In addition, Cheng et al 38 found that xylose consumption using C. tropicalis W103 strain was not affected by acetic acid when its concentration was lower than 2 g/L. Xylitol yield under elevated pH conditions decreased dramatically when the concentration of furfural further increased as depicted in Figure 2(B).…”

Production of Xylitol by the Thermotolerant Kluyveromyces marxianus IMB Strains

“…D. hansenii with 0.78 g/g) [8], 10]. However, the maximum observed productivity of 0.24 g/L/h is much lower than observed for C. tropicalis W103, which was 1.07 g/L/h [11]. Increased productivity is necessary for utilizing K. marxianus IMB2 for industrial xylitol production.…”

“…Debaryomyces hansenii was observed to produce xylitol with product yields from 0.76 g/g to 0.78 g/g at 30°C and 200 rpm using Erlenmeyer flasks [8][9][10]. In a study using corn cob hemicellulose hydrolyzate, xylitol yields from xylose up to 0.73 g/g were observed using Candida tropicalis W103 at 35 °C [11].…”

Distribution and diversity of Candida tropicalis strains in different marine environments

“…C. tropicalis can also be used to produce xylitol using xylose as the sole carbon source. It has been employed to convert corncob hydrolysate to xylitol (Cheng et al, 2009;Rao et al, 2006). Many strains of C. tropicalis can remove and recover zirconium (Akhtar et al, 2008).…”