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Table 6 Analysis of variance result for the parameters of quadratic model by CCD of response surface methodology

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

Source Sum of squares DF Mean square F value P value
Prob > F
 
Mode 7288.7 7 1041 19.65 < 0.0001 Significant
A: temperature 44.7 1 44.72 0.84 0.3763 Insignificant
B: rotation speed 2.75 1 2.75 0.052 0.8236 Insignificant
C: inoculation amount 107.5 1 107.5 2.03 0.1799 Insignificant
AB 1471.5 1 1471.5 27.77 0.0002 Significant
AC 1287   1287 24.29 0.0003 Significant
A2 2331 12 2330.9 44 < 0.0001 Significant
B2 119.24   119.24 2.36 0.1462 Insignificant
C2 1654 7 2330.9 31.22 0.0001 Significant
Residual 635.8 12 52.99    
Lack of fit 431.3 7 61.62 1.51 0.3369 Insignificant
Pure error 204.50 5 40.90    
Cor total 7809.69 19     
  1. R2 = 0.91, Adj R2 = 0.87, PredR2 = 80, Adeq precision = 16.01, C.V. % = 12.57, mean = 56.53