Table 2.

Actual and coded factor values of the response surface methodology for optimization of bacterial cellulose (BC) production in the Corinthian currant finishing side-stream (CFS) extracts.

Independent Variable	Unit	Symbol	Coded Values
			−1	0	1
Experiment 1: Addition of N-source
Sugars concentration in the CFS substrate	g/L	X1	20	50	80
pH		X2	4	6	8
Temperature	°C	X3	20	25	30
Experiment 2: Addition of cheese whey
pH		X1	3.8	6	8.2
Whey percentage in the CFS substrate	% v/v	X2	0	35	70
Yeast extract addition	% w/v	X3	0	0.5	1