Optimization of Crude Oil and PAHs Degradation by Stenotrophomonas rhizophila KX082814 Strain through Response Surface Methodology Using Box-Behnken Design

Table 5

Analysis of variances using ANOVA for response surface by quadratic model.

Source	Sum of squares	df	Mean square	-value	value,
Model	639.46	14	45.68	3.31	0.0163	Significant
-temperature	85.33	1	85.33	6.18	0.0262
-pH	21.60	1	21.60	1.56	0.2316
-salinity	76.86	1	76.86	5.56	0.0334
-inoculum Size		1			0.9909
	0.71	1	0.71	0.051	0.8245
	16.61	1	16.61	1.20	0.2914
	56.93	1	56.93	4.12	0.0618
	0.91	1	0.91	0.066	0.8010
	18.36	1	18.36	1.33	0.2683
	33.47	1	33.47	2.42	0.1419
	231.68	1	231.68	16.77	0.0011
	4.27	1	4.27	0.31	0.5871
	101.60	1	101.60	7.35	0.0169
	1.76	1	1.76	0.13	0.7268
Residual	193.42	14	13.82
Lack of fit	62.13	10	6.21	0.19	0.9850	Not significant
Pure error	131.28	4	32.82
Cor total	832.88	28