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Table 1 Coded levels of independent variables in the experimental design

From: Production of biodiesel from coastal macroalgae (Chara vulgaris) and optimization of process parameters using Box-Behnken design

Variables*

Coded levels

+1

0

−1

Chloroform (ml)

118.8

158.4

198

NaCl (%)

0.70

0.75

0.80

Temperature (°C)

55

60

65

  1. *Where, each of chloroform and NaCl concentration is given for 12 gm of dry algae biomass
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