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

Table 6

Coded values of the test variables.

Factor	Coefficient	df	Standard	95% CI	95% CI	VIF
	estimate		error	Low	High
Intercept	64.76	1	1.66	61.20	68.33
-temperature	−2.67	1	1.07	−4.97	−0.37	1.00
-pH	−1.34	1	1.07	−3.64	0.96	1.00
-salinity	−2.53	1	1.07	−4.83	−0.23	1.00
-inoculum Size	−0.013	1	1.07	−2.31	2.29	1.00
	−0.42	1	1.86	−4.41	3.57	1.00
	2.04	1	1.86	−1.95	6.02	1.00
	−3.77	1	1.86	−7.76	0.21	1.00
	−0.48	1	1.86	−4.46	3.51	1.00
	−2.14	1	1.86	−6.13	1.84	1.00
	−2.89	1	1.86	−6.88	1.09	1.00
	−5.98	1	1.46	−9.11	−2.85	1.08
	0.81	1	1.46	−2.32	3.94	1.08
	−3.96	1	1.46	−7.09	−0.83	1.08
	−0.52	1	1.46	−3.65	2.61	1.08