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Table 6 Code limit for variables used in the experiment design

From: Filter cake extract from the beet sugar industry as an economic growth medium for the production of Spirulina platensis as a microbial cell factory for protein

Factor

Unit

Symbol

Levels

   

− 2

− 1

0

+ 1

+ 2

NaNo3

(g/L)

X1

0.6

1.075

1.55

2.025

2.5

NaHCO3

(g/L)

X2

0

4.2

8.4

12.6

16.8

BFCE

(%)

X3

0.25

0.375

0.5

0.625

0.75

pH

–

X4

8

8.75

9.5

10.25

11

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Microbial Cell Factories

ISSN: 1475-2859

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