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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