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Fengjie Cui,Zhiqiang Liu,Yin Li,Lifeng Ping,Liying Ping,Zhicai Zhang,Lin Lin,Ying Dong,Daming Huang 한국생물공학회 2010 Biotechnology and Bioprocess Engineering Vol.15 No.2
The Doehlert experimental design was used to optimize the production of mycelial biomass and exopolymer from Hericium erinaceus CZ-2 in this study. Statistical analysis showed that the linear and quadric terms of 3 variables: corn flour, yeast extract, and corn steep liquor had significant effects. The optimized combination of these 3 variables was confirmed through validation experiments. The optimal conditions for higher production of mycelial biomass (19.92 g/L) were estimated when the media composition concentrations were set as: 30.85 g/L,corn flour; 2.81 g/L, yeast extract; 16.9 mL/L, corn steep liquor; 10 g/L, glucose; 1 g/L, KH2PO4; and 0.5 g/L,MgSO4·7H2O; while a maximal exo-polymer yield (1.653g/L) could be achieved when setting concentrations of:32.71 g/L, corn flour; 2.35 g/L, Yeast extract; 14.42 mL/L,Corn steep liquor; 10 g/L, glucose; 1 g/L, KH2PO4; and 0.5g/L, MgSO4·7H2O. The upscale production was also investigated using a 15 L fermentor using the optimized medium.
Wen-Hua Teng,Wen-Jing Sun,Bin Yu,Fengjie Cui,Jing-Ya Qian,Jingze Liu,Liang Wang,Xiang-Hui Qi,Hua Wei 한국생물공학회 2013 Biotechnology and Bioprocess Engineering Vol.18 No.4
A continuous conversion process of rice starch hydrolysate to 2-keto-D-gluconic acid (2KGA) by Arthrobacter globiformis C224 was developed. Its feasibility for industrial application was also evaluated. Results showed that the initial cell concentration exceeding 1.25 g/L met the continuous 2KGA production at a stable dilution rate and media composition, while the dilution rate and feeding glucose concentration had a significant effect on 2KGA production performance. The optimal operating parameters were obtained as: 0.090/h of dilution rate and 171.0 g/L of feeding glucose concentration. Under these conditions, the steady state had a produced 2KGA concentration of 124.74 g/L, average volumetric productivity of 11.23 g/L/h,and yield of 0.97 g/g. In conclusion, continuous 2KGA production by the A. globiformis C224 strain would be a superior industrial process for the production of 2KGA in terms of its high 2KGA productivity and yield.