Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2002 by Universidad Católica de Valparaíso -- Chile
Vol. 5 No. 3, Issue of December 15, 2002
 


Table 3. Kinetic parameters for citric acid production from molasses sugars following growth of Aspergillus niger strains.

Kinetic parameters

GCBT2

GCBT7

GCBT8

Citric acid formation parameters

-

Qp (g/l/h)

0.543

0.590

0.507

Yp/s (g/g)

0.763

0.929

0.748

Yp/x (g/g)

5.229

4.237

3.817

qp (g/g cells/h)

0.036

0.029

0.026

Substrate consumption parameters

-

(h-1)

0.540

0.589

0.506

Yx/s (g/g)

0.219

0.219

0.196

Qs (g/l/h)

0.711

0.635

0.678

Qx (g cells/l/h)

0.104

0.139

0.133

qs (g/g cells/h)

0.047

0.032

0.035

Kinetic parameters:
Qp: g citric acid produced/l/h;
Yp/s: g citric acid produced/g substrate consumed:
Yp/x: g citric acid produced/g cells formed;
Qp: g citric acid produced/g cells/h;
(h-1): specific growth rate;
Yx/s: g cells/g substrate utilized;
Qs: g substrate consumed/l/h;
Qx: g cell mass produced/l/h;
Qs: g substrate consumed/g cells/h.

 


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