Table 2.

Testing values and synthetic evaluation index at the design of L₉ (2³) orthogonal array

Temperature(°C)	%dewatering	Y1(μmol/g solid)	Y2	Y3(kWh/kg)	Y4(g/g min)	S
50	0	12.380	17.94	8.36	0.734	0.349
50	30	7.400	15.25	7.52	0.692	0.119
50	60	7.920	5.28	5.96	0.801	0.427
60	0	11.720	14.40	5.92	0.914	0.483
60	30	8.611	17.34	4.88	0.748	0.251
60	60	9.408	14.22	3.68	1.538	0.465
70	0	13.330	19.45	7.28	1.134	0.443
70	30	13.740	7.51	5.64	1.118	0.780
70	60	10.930	5.74	2.84	2.159	0.813
0.299	0.425
0.400	0.384
0.679	0.568
0.380	0.185

^aA1, A2, A3 are the average values of total evaluation related with the same factor at three levels, respectively

^bR = A_imax-A_imin, i = 1,2,3