Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2006 by Universidad Católica de Valparaíso -- Chile
Vol. 9 No. 4, Issue of July 15, 2006
 

Table 2. The independent variables and their levels for the experimental design with central point.


Variables

Levels

+1

0

-1

X1- Calcium Carbonate Concentration (g/L)

1.0

0.8

0.5

X2 - Aeration (vvm)

1.3

0.8

0.2

X3 - Agitation (rpm)

800

500

200


Supported by UNESCO / MIRCEN network