Waste to Energy: Response Surface Methodology for Optimization of Biodiesel Production from Leather Fleshing Waste

Table 3

Actual and predicted value of biodiesel yield.

Run	Factors			Biodiesel (ml)		% Biodiesel yield		Residuals
	Catalyst (wt. /wt. %)	Methanol to oil molar ratio	Temperature °C	Actual	Predicted	Actual	Predicted
1	1.50	9.00	55.00	38.20	38.230	76.4	76.46	-0.061
2	0.50	3.00	65.00	36.00	35.970	72	71.94	0.059
3	1.00	6.00	60.00	48.55	48.405	97.1	96.81	0.290
4	1.00	6.00	55.00	45.00	45.015	90	90.03	-0.025
5	0.50	9.00	55.00	34.70	34.670	69.4	69.34	0.035
6	1.00	6.00	65.00	44.00	43.985	88	87.97	0.035
7	1.00	6.00	60.00	48.25	48.405	96.5	96.81	-0.310
8	0.50	3.00	55.00	35.50	35.525	71	71.05	-0.051
9	0.50	6.00	60.00	44.50	44.495	89	88.99	0.015
10	0.50	9.00	65.00	34.00	34.04	68	68.08	-0.081
11	1.00	6.00	60.00	48.40	48.405	96.8	96.81	-0.011
12	1.00	9.00	60.00	43.00	42.985	86	85.97	0.035
13	1.00	6.00	60.00	48.50	48.405	97	96.81	0.190
14	1.00	6.00	60.00	48.20	48.405	96.4	96.81	-0.410
15	1.50	3.00	65.00	34.40	34.430	68.8	68.86	-0.061
16	1.00	3.00	60.00	42.75	42.765	85.5	85.53	-0.025
17	1.50	9.00	65.00	35.75	35.725	71.5	71.45	0.049
18	1.50	3.00	55.00	35.9	35.86	71.8	71.72	0.079
19	1.50	6.00	60.00	45.5	45.505	91	91.01	0.000
20	1.00	6.00	60.00	48.52	48.405	97.05	96.81	0.240