Research Article

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

Table 5

ANOVA for % recovery.

Source DF Seq SS Adj SS Adj MS

Regression 9429.487 429.487 47.721 6.23 0.004*
Linear 3186.308 186.308 62.103 8.10 0.005*
Square 3160.677 160.677 53.559 6.99 0.008*
Interaction 382.501 82.501 27.500 3.59 0.054
Residual Error 1076.654 76.654 7.665
Lack-of-Fit 573.949 73.949 14.790 27.34 0.001*
Pure Error 52.704 2.704 0.541

Total 19506.140

*Significant at 95% confidence level.