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\hypersetup{pdftitle={Development of a Screw Press Oil Expeller for Palm Kernel and Soybean Oil Extraction},pdfauthor={Adesoji Olaniyan},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Construction, Design, Oil Expeller, palm Kernel, Screw, Soybean, Yield},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
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\Large{\textbf{Development of a Screw Press Oil Expeller for Palm Kernel and Soybean Oil Extraction\footnote{\textbf{Contact Address:} Adesoji Olaniyan, University of Ilorin, Department of Agricultural and Biosystems Engineering, 54 Old Bungalow, Senior Staff Quarters, University of Ilorin, 240003~Ilorin, Nigeria, \mbox{e-mail}: \email{amolan397@hotmail.com}}\\[0.8ex]}}
\normalsize{\textsc{Adesoji Olaniyan}}
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\item[]{\small{\textit{University of Ilorin, Department of Agricultural and Biosystems Engineering, Nigeria}}}
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\index[author]{Olaniyan, Adesoji}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
Vegetable oils and fats have gained popularity in food, cosmetic, soap, pharmaceutical and medical industries for the production of cooking oil and magarine, pomade, toilet soaps, drugs and medical ointments respectively. Recently, they have found their uses in energy and automotive industries as biodiesel and engineering industry as cooling fluid in machining process and lubricants for machine components. A screw press oil expeller was designed, constructed and tested for palm kernel (Elaeis guinensis) oil and soybean (Glycyrrhza lepidota) oil extraction. While in designing and in material selection, consideration was given to the techno"=economic status of the micro and small scale vegetable oil processors who are the intended users of the machine. The functional parts of the machine included barrel, worm shaft, gear reduction box, prime mover, oil outlet, cake outlet, hopper, pulley, transmission belts and bearings. The worm shaft is at an increasing diameter while the screw system is at a decreasing pitch - a combination that is essential for obtaining maximum pressure for oil extraction and cake extrusion process. In operation, the gradually built"=up pressure along the worm shaft travel conveys, crushes, grinds, presses and squeezes oil out of the seeds into the oil outlet via the oil channel. The residual cake from where the oil is extracted is extruded out of the cake outlet in form of flakes. The expeller was tested and results showed a high oil yield and extraction efficiency with low extraction loss. Powered by a 30 hp three"=phase electric motor, the expeller has a production cost of \$1200. A cottage palm kernel and soybean oil extraction plant based on this technology can provide employment for 3 persons at the same time producing oil for food, soap and cosmetic industries and cake for livestock feed industry at low costs.}

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\noindent \textbf{Keywords:} Construction, Design, Oil Expeller, palm Kernel, Screw, Soybean, Yield
\index[key]{Construction}
\index[key]{Design}
\index[key]{Oil Expeller}
\index[key]{Palm Kernel}
\index[key]{Screw}
\index[key]{Soybean}
\index[key]{Yield}
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