On the difficulty of pressing hulled sunflower seeds: challenges in mechanical oil extraction | OCL

Technological challenges in oilseed crushing and refining / Défis technologiques de la trituration et du raffinage des oléagineux

Open Access

Table 3

Throughputs measures, oil yields assessment, pressure, power and temperature (Pressure sensors in position A1).

Speed (rpm)		3.5 rpm			7 rpm
SK input	kg/h	22.75	±	0.23	39.33	±	0.17
Cake output	kg/h	10.84	±	0.34	29.71	±	0.15
Oil output	kg/h	11.91	±	0.08	9.62	±	0.06
Clarified oil outpt	kg/h	9.77	±	0.07	7.42	±	0.05
Foots output	kg/h	2.14	±	0.02	2.19	±	0.01

Oil yield (1)		91.4%	±	1.35%	42.7%	±	0.25%
Oil yield (2)		92.8%	±	0.25%	43.8%	±	2.76%
Oil yield (3)		75.0%	±	1.11%	35.0%	±	0.21%

Residual oil / cake	(%)	8.63	±	0.18	42.60	±	2.12

Crude Oil	g/rev.	56.72	±	0.40	22.90	±	0.14
Clarified oil outpt	g/rev.	41.34	±	1.95	15.47	±	0.09
Cake output	g/rev.	51.63	±	1.60	70.74	±	0.35
Cake + Crude oil	g/rev.	108.36	±	1.66	93.64	±	0.37

P₁	(bar)	5.27	±	0.10	20.60	±	0.40
P₂	(bar)	28.53	±	0.22	36.37	±	0.22
P₃	(bar)	38.47	±	0.48	11.83	±	0.13
P₄	(bar)	59.23	±	0.83	0.27	±	0.05
Temperature	(°C)	56.96	±	0.72	57.22	±	0.33

Power	W	502	±	11	689	±	17
SME*	Wh/kg	25.21			20.02

With SME = Specific Mechanical Energy = P/ ${\dot{M}}_{S K}$ , P = Power (W); ${\dot{M}}_{S K}$ = flow of sunflower kernels (kg/h).

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