Applied Biochemistry and Biotechnology

, Volume 160, Issue 2, pp 350–359 | Cite as

Production of Butyric Acid from Glucose and Xylose with Immobilized Cells of Clostridium tyrobutyricum in a Fibrous-bed Bioreactor

Article

Abstract

Butyric acid has many applications in chemical, food, and pharmaceutical industries. In the present study, Clostridium tyrobutyricum ATCC 25755 was immobilized in a fibrous-bed bioreactor to evaluate the performance of butyrate production from glucose and xylose. The results showed that the final concentration and yield of butyric acid were 13.70 and 0.46 g g−1, respectively, in batch fermentation when 30 g L−1 glucose was introduced into the bioreactor. Furthermore, high concentration 10.10 g L−1 and yield 0.40 g g−1 of butyric acid were obtained with 25 g L−1 xylose as the carbon source. The immobilized cells of C. tyrobutyricum ensured similar productivity and yield from repeated batch fermentation. In the fed-batch fermentation, the final concentration of butyric acid was further improved to 24.88 g L−1 with one suitable glucose feeding in the fibrous-bed bioreactor. C. tyrobutyricum immobilized in the fibrous-bed bioreactor would provide an economically viable fermentation process to convert the reducing sugars derived from plant biomass into the final bulk chemical (butyric acid).

Keywords

Butyric acid Clostridium tyrobutyricum Biomass resource Fibrous-bed bioreactor Immobilization 

Notes

Acknowledgements

This work was supported by a grant from the Ministry of Science and Technology of China (National Basic Research Program of China, 2007CB707805).

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Copyright information

© Humana Press 2008

Authors and Affiliations

  1. 1.School of Bioscience and BioengineeringSouth China University of TechnologyGuangzhouChina
  2. 2.Institute of Bioengineering, Department of Chemical and Biochemical EngineeringZhejiang UniversityHangzhouChina

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