Table 3.

Results of orthogonal test of fermentation conditions

No.	Experimental factors and levels			x (Lactic acid production, g/L)
	A (Temperature, °C)	B (Starch dosage, g/L)	C (Inoculum,×109cfu/L)
1	12	1.02	0.35	1.375
2	12	6.15	1.75	0.474
3	12	11.24	3.15	2.537
4	17	1.02	1.75	2.694
5	17	6.15	3.15	3.578
6	17	11.24	0.35	7.373
7	22	1.02	3.15	5.358
8	22	6.15	0.35	4.625
9	22	11.24	1.75	5.491
K 1 = Σxi 1 a	4.386	9.427	13.373
K 2 = Σxi 2 a	13.646	8.677	8.659
K 3 = Σxi 3 a	15.474	15.401	11.474
k 1 = $\stackrel{‐}{x}$ i 1 a	1.462	3.142	4.458
k 2 = $\stackrel{‐}{x}$ i 2 a	4.549	2.892	2.886
k 3 = $\stackrel{‐}{x}$ i 3 a	5.158	5.134	3.825
Range (R)	3.696	2.241	1.572

^a i = A, B, or C.