Optimization of pullulan production from hydrolysed potato starch waste by response surface methodology

Utilization of corn steep liquor for biosynthesis of pullulan, an important exopolysaccharide

“…In the present study, five different agri-industrial wastes namely rice bran oil cake, soya bean oil cake, cotton seed oil cake, mustard seed oil cake and corn steep liquor (CSL) were examined for their use as nutrient sources for production of pullulan using A. pullulans RBF 4A3. Among the selected agri-industrial residues CSL was found to be the most suitable as nutrient and the pullulan produced was also high as compared to earlier published reports (Ksungur et al, 2011;Shengjun, Jin, Tong, & Chen, 2009). …”

“…There are also reports of using cheap raw materials like soybean pomace (Seo et al, 2004), hydrolysed potato starch for pullulan production (Ksungur, Uzunogulları, & Dagbaglı, 2011). However, in those cases, the yield was not significantly high and hence the economics of the process was also not much favorable.…”

Levan production by Zymomonas mobilis in batch and continuous fermentation systems

“…Similar findings were also reported for other microbial polysaccharides. Göksungur et al (2011) found that 0.4 g/L yeast extract concentration was optimum for pullulan production by Aureobasidium pullulans and at a higher nitrogen concentration, pullulan concentration decreased. Schuster, Wenzig, and Mersmann (1993) found that the formation rate of pullulan increased up to ammonium sulphate concentrations of 1.2 g/L, however at higher nitrogen quantities, the product formation rate decreased since the microorganism was able to grow more intensively.…”

“…This restriction can be overcome by using RSM in such a way that can identify and quantify the various interactions among different parameters. RSM has been extensively used to optimize the cultural medium conditions and other parameters in bioprocesses (Göksungur, Uzunogulları, & Dagbaglı, 2011;Li, Bai, Cai, & Ouyang, 2002;Ürküt, Dagbaglı, & Göksungur, 2007).…”

Improvement of submerged culture conditions to produce colorants by Penicillium purpurogenum

“…It can reduce the number of experimental runs and provide sufficient information for a statistically acceptable result (Guo et al , 2012). In this way, response surface analysis and orthogonal experimental design are commonly used approaches which are useful in fermentative process optimization (Gösungur et al , 2011; Yu et al , 2012). …”