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Table 5 Experimental CCD design matrices of their variables and their response values of FAME yield in direct transesterification process

From: Bioconversion of sago processing wastewater into biodiesel: Optimization of lipid production by an oleaginous yeast, Candida tropicalis ASY2 and its transesterification process using response surface methodology

Run

A:Methanol, mL

B:Catalyst conc., M

C:Time, h

FAME yield, %

1

30

0.3

7.5

80.58

2

30

0.3

3.30

69.89

3

13.18

0.3

7.5

78.96

4

40

0.2

5

66.52

5

30

0.3

7.5

77.74

6

20

0.4

5

86.56

7

40

0.4

10

72.34

8

40

0.2

10

68.54

9

30

0.3

7.5

79.53

10

30

0.3

7.5

81.97

11

20

0.4

10

83.65

12

40

0.4

5

69.72

13

46.82

0.3

7.5

61.58

14

30

0.47

7.5

84.56

15

30

0.3

7.5

81.07

16

20

0.2

10

76.12

17

30

0.13

7.5

75.82

18

20

0.2

5

82.71

19

30

0.3

11.70

71.56

20

30

0.3

7.5

77.14