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

Table 1

Levels of the input parameters.

			Coded level
Input parameter		Unit	−1	0	+1
Particle size	θ1	μm	0.366	0.462	0.641
Dryness level	θ2	%	50	75	100
Solid to solvent ratio	θ3	g/ml	1 : 5	1 : 10	1 : 15
Reaction time	θ4	Hours	1	2	3
Reaction temperature	θ5	°C	65	70	75