Removal of Olive Mill Wastewater Phenolics with the Use of a Polyphenol Oxidase Homogenate from Potato Peel Waste

Table 2

Measured and predicted % TP removal values determined for individual design points.

Design point	Independent variables			Response (% TP removal)
	𝑋1	𝑋2	𝑋3	Observed	Predicted
1	−1	−1	−1	42.6	42.2
2	−1	−1	1	42.1	41.5
3	−1	1	−1	35.7	34.3
4	−1	1	1	34.0	32.9
5	1	−1	−1	40.0	39.7
6	1	−1	1	25.5	25.5
7	1	1	−1	48.5	47.7
8	1	1	1	34.0	32.9
9	−1	0	0	0	3.5
10	1	0	0	0	2.2
11	0	−1	0	23.0	24.3
12	0	1	0	19.6	24.0
13	0	0	−1	40.4	43.3
14	0	0	1	32.8	35.6
15	0	0	0	20.0	14.7
16	0	0	0	20.9	14.7