(2)

Table 1: Experimental range and levels of the process variables used in BBD design.

Variables	Coded Symbol	Range and Levels
		-2	-1	0	1	2
pH	X	3	5	6	7	8
Concentration of Binary Inhibitor (mg/ L)	Y	15	19	23	26	30
Time (Days)	Z	3	8	13	17	21