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Table 5 Experimental design and independent variables, using central composite design, and the corresponding response for cyanide biodegradation

From: Significant increase in cyanide degradation by Bacillus sp. M01 PTCC 1908 with response surface methodology optimization

Std. order Temperature (°C) Rotation speed (rpm) Inoculation amount (%) Response
1 30 130 1.5 52.9
2 44 130 1.5 63.5
3 30 230 1.5 84.0
4 44 230 1.5 32.2
5 30 130 5 24.0
6 44 130 5 74.2
7 30 230 5 49.3
8 44 230 5 56.4
9 25 180 3.25 92.8
10 49 180 3.25 96.1
11 37 65 3.25 69.2
12 37 264 3.25 63.1
13 37 180 0.31 32.2
14 37 180 6.19 24.7
15 37 180 3.25 59.4
16 37 180 3.25 47.7
17 37 180 3.25 49.7
18 37 180 3.25 52.7
19 37 180 3.25 61.0
20 37 180 3.25 45.2