Influences of phenolic compounds on citric acid productivity by Aspergillus niger in stirred fermentor
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Keywords

A. niger
citric acid
fermenter
toxic chemicals (phenols)

How to Cite

1.
Çevrimli BS, Kariptaş E, Yaşar A, Yiğitoğlu M. Influences of phenolic compounds on citric acid productivity by Aspergillus niger in stirred fermentor. Electron. J. Biotechnol. [Internet]. 2010 Dec. 6 [cited 2024 Nov. 3];13(6):0-. Available from: https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v13n6-1

Abstract

Influences of phenol, α-naphtol and β-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, α-naphtol and β-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.

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