Scale-up of citric acid fermentation by redox potential control

1999 ◽  
Vol 64 (5) ◽  
pp. 552-557 ◽  
Author(s):  
Marin Berovi?
Keyword(s):  
Citric Acid ◽  
Redox Potential ◽  
Scale Up ◽  
Acid Fermentation ◽  
Potential Control ◽  
Citric Acid Fermentation

SUBMERGED CITRIC ACID FERMENTATION OF SUGAR BEET MOLASSES: INCREASE IN SCALE

1955 ◽  
Vol 1 (5) ◽  
pp. 299-311 ◽  
Author(s):  
R. Steel ◽  
C. P. Lentz ◽  
S. M. Martin
Keyword(s):  
Citric Acid ◽  
Scale Up ◽  
Aeration Rate ◽  
Small Scale ◽  
Acid Fermentation ◽  
Inoculum Level ◽  
Cross Sectional ◽  
Factors Affecting ◽  
Beet Molasses ◽  
Initial Ph

Factors affecting the production of citric acid in the submerged fermentation of ferrocyanide-treated beet molasses by Aspergillus niger were studied in 2.5 and 36 liter fermenters. The small fermenters were used to determine the effects of changes in sterilization technique, phosphate supplement, ferrocyanide treatment, inoculum level, initial pH, fermentation temperature, and aeration rate. The relation between ferrocyanide concentration and inoculum level was also studied. Four different samples of molasses were fermented successfully. An average yield of 8.2% citric acid (64% conversion) was obtained from 51 small-scale fermentations. Comparable yields were obtained in the large fermenters under comparable conditions. Most of the information obtained with the small fermenters was applicable to the larger-scale fermenters, but in the latter the fermentation was significantly more stable. Aeration was the main problem in the scale-up and aeration rates approximately double those calculated on a fermenter cross-sectional area basis were required for comparable results in the large fermenters.

Citric Acid Fermentation by Aspergillus niger NG-110 in Shake Flask

2003 ◽  
Vol 3 (3) ◽  
pp. 360-370 ◽  
Author(s):  
Rubina Mazhar ◽  
Sikander Ali . ◽  
Ikram-ul-haq . ◽  
Abdul Waheed .
Keyword(s):  
Citric Acid ◽  
Aspergillus Niger ◽  
Shake Flask ◽  
Acid Fermentation ◽  
Citric Acid Fermentation
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