Optimization of Oil Yield from the Macro Algae Spirogyra by Solvent Extraction Process Using RSM and ANN

Table 2

The CCD arrived with Design-Expert factorial design and the response values.

Exp. no	Particle size	Dryness level	Solid to solvent ratio	Reaction time	Extraction temperature	Oil yield %
						Experimental value	Predicted value
	μm	%	g/ml	Hours	°C		RSM	ANN
1	− 1	-1	+1	− 1	− 1	22.13	22.42	22.15
2	− 1	+1	− 1	+1	− 1	20.97	21.44	20.98
3	− 1	-1	+1	+1	− 1	23.05	23.06	22.95
4	− 1	+1	+1	− 1	− 1	22.61	22.90	22.64
5	− 1	+1	− 1	− 1	1	21.56	21.71	21.59
6	− 1	+1	− 1	− 1	− 1	20.05	20.22	19.86
7	− 1	+1	− 1	+1	+1	23.19	22.98	23.46
8	− 1	− 1	+1	− 1	+1	23.58	23.30	23.60
9	− 1	+1	+1	− 1	+1	23.48	23.52	23.52
10	− 1	− 1	+1	+1	+1	23.53	24.00	23.54
11	− 1	− 1	− 1	+1	− 1	20.49	20.81	20.53
12	− 1	+1	+1	+1	− 1	23.53	23.56	23.55
13	− 1	− 1	− 1	− 1	+1	21.03	21.36	21.06
14	− 1	0	0	0	0	23.63	24.31	23.65
15	− 1	− 1	− 1	+1	+1	22.71	22.62	22.75
16	− 1	− 1	− 1	− 1	− 1	19.57	19.61	19.73
17	− 1	+1	+1	+1	+1	23.59	24.23	23.61
18	0	0	0	0	− 1	23.26	22.87	23.27
19	0	0	0	− 1	0	23.98	24.78	24.00
20	0	0	0	0	0	24.78	25.42	25.20
21	0	0	− 1	0	0	24.04	24.48	24.07
22	0	0	0	+1	0	26.10	25.80	26.12
23	0	0	+1	0	0	26.58	26.65	26.54
24	0	0	0	0	0	25.23	25.42	25.20
25	0	0	0	0	0	25.58	25.42	25.20
26	0	− 1	0	0	0	24.41	25.11	24.44
27	0	0	0	0	0	25.70	25.42	25.20
28	0	0	0	0	0	24.83	25.42	25.20
29	0	0	0	0	0	24.90	25.42	25.20
30	0	+1	0	0	0	25.72	25.52	25.75
31	0	0	0	0	0	25.35	25.42	25.20
32	0	0	0	0	+1	23.46	24.30	23.48
33	0	0	0	0	0	25.41	25.42	25.20
34	+1	+1	+1	− 1	+1	22.82	22.80	22.83
35	+1	− 1	+1	+1	+1	23.44	23.44	23.44
36	+1	+1	− 1	− 1	− 1	18.81	18.80	18.89
37	+1	− 1	− 1	+1	− 1	19.25	19.56	19.27
38	+1	+1	+1	+1	− 1	22.29	22.55	22.32
39	+1	+1	− 1	+1	+1	21.96	22.11	21.97
40	+1	− 1	+1	− 1	− 1	20.89	21.31	20.91
41	+1	− 1	+1	+1	− 1	21.81	22.08	21.83
42	+1	+1	− 1	+1	− 1	19.72	20.15	19.74
43	+1	− 1	− 1	− 1	− 1	18.34	18.22	18.38
44	+1	+1	+1	− 1	− 1	21.35	21.75	21.38
45	+1	+1	+1	+1	+1	23.34	23.64	23.35
46	+1	− 1	1	− 1	+1	22.34	22.61	22.44
47	+1	− 1	− 1	+1	+1	21.47	21.77	21.48
48	+1	0	0	0	0	23.54	23.32	23.65
49	+1	+1	− 1	− 1	+1	20.26	20.71	20.28
50	+1	− 1	− 1	− 1	+1	20.37	20.38	19.88