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Zhong-Ce Hu,Yu-Guo Zheng,Yin-Chu Shen 한국생물공학회 2010 Biotechnology and Bioprocess Engineering Vol.15 No.4
This study investigated the effects of DO concentration on DHA fermentation and of DO-stat fed-batch fermentation using a pH control strategy, on 1,3-dihydroxyacetone (DHA) production. The results showed that DO-stat fed-batch fermentation with pH-shift control was the optimal bioprocess for DHA production. DO-stat fedbatch fermentation was carried out at 30% air saturation,and the culture pH was automatically maintained at pH 6.0during the first 20 h and then shifted to pH 5.0 until the end of the fermentation. An optimal DHA concentration of 175.9 ± 6.7 g/L, with a production yield to glycerol of 0.87 ± 0.04 g/g, was obtained at 72 h of DO-stat fed-batch fermentation at 30°C in a 15 L fermenter.