Optimization of Aqueous Two-Phase Systems for the Recovery of Soluble Proteins from Tannery Wastewater Using Response Surface Methodology

Table 3

ANOVA table for fFD.

Source	Degrees of freedom	Sum of squares (SS)	Mean square	𝐹 value	𝑃 value
PEG	1	83.63	83.63	5.93	0.055
pH	1	1402.88	1402.88	99.50	0.000*
NaCl	1	1324.60	1324.60	93.95	0.000*
Temperature	1	124.43	124.43	8.83	0.014*
PEG*Temperature	1	294.29	294.29	20.87	0.001*
Error	10	140.99	14.10
Total	15	3370.82

𝑆=3.75490;  𝑅-Sq = 95.82%;  𝑅-Sq(adj) = 93.73%.
*Significant at 95% confidence level.