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Fluid Flow Induced Shear Stress Affects Cell Growth and Total Flavone Production by Phellinus igniarius in Stirred-Tank Bioreactor


Paper Type 
Contributed Paper
Title 
Fluid Flow Induced Shear Stress Affects Cell Growth and Total Flavone Production by Phellinus igniarius in Stirred-Tank Bioreactor
Author 
Hu Zhu, Wei Liu, Baozhen Tian and Shuaisshuai Zhang
Email 
hzhu@live.cn
Abstract:

The  effect  of  fluid  flow  induced  shear  stress  on  dry  cell  mass  and  total flavone  production  in  the  cultivation  of  Phellinus  igniarius  has  been  studied. The  results  showed  that  at  impeller  tip  speeds (ITS) of  0.628, 1.256 and 1.884 m·s-1, the  maximal  production  of  total  flavone  was  2.80, 3.17 and 2.19 g·L-1  respectively. A  relatively  high  cell  concentration  of 7.8 g·L-1  by  dry  mycelial  biomass  was  obtained  in  the  bioreactor   at  an  ITS  of  1.256 m·s-1 . At  these  ITSs, the  maximal  apparent  viscosity  was  1.123, 1.814 and 1.465 mPa·s  and  the  exopolysaccharide  production  reached  to  7.2, 9.4 and 8.1 g·L-1  respectively. The  flow  behavior  of  fermented  broths  was  recorded  photographically  during  submerged  culture. The  information  obtained  should  assist  progress  towards  the  large  scale  production  of  flavone  by submerged  cultivation  of Phellinus  igniarius.

 

Start & End Page 
69 - 75
Received Date 
2011-10-08
Revised Date 
Accepted Date 
2011-11-15
Full Text 
  Download
Keyword 
Bioreactor, cell biomass, Phellinus igniarius, shear stress
Volume 
Vol.39 No.1 (JANUARY 2012)
DOI 
Citation 
Zhu H., Liu W., Tian B. and Zhang S., Fluid Flow Induced Shear Stress Affects Cell Growth and Total Flavone Production by Phellinus igniarius in Stirred-Tank Bioreactor, Chiang Mai J. Sci., 2012; 39(1): 69-75.
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Chiang Mai Journal of Science

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