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Tropical Journal of Pharmaceutical Research
Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, Nigeria
ISSN: 1596-5996
EISSN: 1596-9827
Vol. 12, No. 5, 2013, pp. 711-718
Bioline Code: pr13087
Full paper language: English
Document type: Research Article
Document available free of charge

Tropical Journal of Pharmaceutical Research, Vol. 12, No. 5, 2013, pp. 711-718

 en Enhancing the Production of a Novel Exopolysaccharide by Bacillus mucilaginosus check for this species in other resources CGMCC5766 Using Statistical Experiment Design
Li, Hui; Li, Jie; Dou, Wenfang; Shi, Jinsong & Xu, Zhenghong


Purpose: To improve the production of a novel exopolysaccharide (EPS) by Bacillus mucilaginosus check for this species in other resources CGMCC5766.
Methods: The culture medium for production of EPS was optimized using statistical experiment design. Sucrose, CaCO3 and K2HPO4 were found to be the key factors based on the results obtained from Plackett–Burman experimental design. The optimal concentration range of the three factors was examined by the steepest ascent path, and then the optimum concentration was further investigated through response surface methodology. Validation experiments were also carried out to establish the adequacy and accuracy of the model obtained.
Results: Under optimal conditions (sucrose 61.31 g/l, CaCO3 5.06 g/l and K2HPO4 0.17 g/l), EPS concentration achieved 22.04 g/l, which was about 1.6-fold increase compared with that using the original medium. EPS concentration in 5-l fermenter reached 23.46 ± 0.76 g/l.
Conclusion: The optimization medium is considered fundamental and useful for the development of B. mucilaginosus CGMCC5766 cultivation process for efficient production of EPS on a large scale.

Bacillus mucilaginosus CGMCC5766; Exopolysaccharide; Optimization; Statistical experiment design

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