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

Table 1

Experimental values and coded levels of the independent variables used for the 2³-full-factorial design.

Independent variables	Code units	Coded variable level
		−1	0	1
[PEG] (mg L^−1)	𝑋1	100	500	900
pH	𝑋2	4	6	8
Time (h)	𝑋3	1	3	5