Figure
6. ffect of different air
supply on the production of citric acid by Aspergillus niger
GCMC-7 in stirred fermentor.
Sugar added: 150 g/l.
Agitation intensity: 200 rpm.
Initial pH: 6.0.
Fermentation period: 144 h.
Incubation temperature: 30ºC.
The error bars indicate the standard deviation among the three parallel
replicates.
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