Influences of phenolic compounds on citric acid productivity by Aspergillus niger in stirred fermentor
Electron. j. biotechnol
;
13(6): 8-9, Nov. 2010. ilus, tab
Article
in English
| LILACS
| ID: lil-591912
ABSTRACT
Influences of phenol, alpha-naphtol and beta-naphtol, which are toxic chemicals, on citric acid biosynthesis and biomass in the artificial culture setting of Aspergillus niger using batch fermenter are examined in the most favorable fermentation conditions, and a model is proposed. Addition of certain concentrations of phenol, alpha-naphtol and beta-naphtol to the culture increases the citric acid production. According to this model, maximum citric acid concentration is 48.3 g L-1 in a culture that does not contain any toxic chemicals, whereas the maximum concentrations obtained in cultures containing 25 mg L-1 phenol, 25 mg L-1 alpha-naphtol and 15 mg L-1 beta-naphtol are 62.5 g L-1, 78.1 g L-1 and 86.0 g L-1, respectively. Moreover, addition of toxic chemicals to the culture reduces fermentation time by 24 hrs.
Full text:
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Index:
LILACS (Americas)
Main subject:
Phenols
/
Aspergillus niger
/
Toxic Substances
/
Citric Acid
/
Naphthols
Language:
English
Journal:
Electron. j. biotechnol
Journal subject:
Biotechnology
Year:
2010
Type:
Article
Affiliation country:
Turkey
Institution/Affiliation country:
Ahi Evran University/TR
/
Gazi University/TR
/
Kirikkale University/TR
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