Medium optimization of Rhodococcus erythropolis LSSE8-1 by Taguchi methodology for petroleum biodesulfurization
文献类型： 外文期刊
第一作者： Li, Yuguang
作者： Li, Yuguang;Xing, Jianmin;Li, Wangliang;Xiong, Xiaochao;Li, Xin;Liu, Huizhou
作者机构：
关键词： biodesulfurization;high cell density cultivation;Rhodococcus erythropolis;taguchi method
期刊名称：KOREAN JOURNAL OF CHEMICAL ENGINEERING （ 影响因子：3.309； 五年影响因子：2.634 ）
ISSN： 0256-1115
年卷期： 2007 年 24 卷 5 期
页码：
收录情况： SCI
摘要： High production of Rhodococcus erythropolis LSSE8-1 and its application for the treatment of diesel oils was investigated. Culture conditions were optimized by Taguchi orthogonal array experimental design methodology. High cell density cultivation of biocatalyst with pH control and fed-batch feeding strategies was further validated in a fermentor with the optimal factors. Cell concentration of 23.9 g dry cells/L was obtained after 96 h cultivation. The resting cells and direct fermentation suspension were applied for deep desulfurization of hydrodesulfurized diesel oils. It was observed that the sulfur content of the diesel decreased from 248 to 51 mu g/g by two consecutive biodesulfurizations. It implied that the biodesulfurization process can be simplified by directly mixing cell cultivation suspension with diesel oil. The biocatalyst developed with the Taguchi method has the potential to be applied to produce ultra-low-sulfur petroleum oils.
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