Acheheb H., Aliouane R., Ferradji A. (2012): Optimization of oil extraction from pistacia atlantica desf. seeds using hydraulic press. Asian Journal of Agricultural Research, 6: 73–82. https://doi.org/10.3923/ajar.2012.73.82 Ajala E.O., Aberuagba F., Olaniyan A.M., Onifade. K.R. (2016): Optimization of solvent extraction of shea butter (Vitellaria paradoxa) using response surface methodology and its characterization. Journal of Food Science Technology, 53: 730–738. https://doi.org/10.1007/s13197-015-2033-7 Ajav E.A., Busari R.A. (2011): Modification and performance evaluation of African bush mango (irvingia gabomensis) cracker. Journal of Agricultural Engineering and Technology (JAET), 19: 60–70. Akinoso R. (2006): Effects of moisture content, roasting duration and temperature on yield and quality of palm kernel (Elaeis guineensis) and sesame (Sesamum indicum) oils [Ph.D. Thesis]. Ibadan, University of Ibadan. Aniket P., Singh A.K. (2016): Optimization of microwave assisted mechanical extraction of oil from canola seeds by using response surface methodology. Agricultural Engineering International, 18: 297–308. AOCS (1998): Official Methods and Recommended Practices of the AOCS. Champaign, American Oil Chemists’ Society. Avallone E.A., Baumeister T., Sadegh A.M. (1996): Standard Handbook for Mechanical Engineering. New York, McGraw-Hill Publishers. Berman P., Nisri S., Wiesman Z. (2011): Castoroil biodiesel and its blends as alternative fuel. Biomass Bioenergy, 35: 2861–2866. https://doi.org/10.1016/j.biombioe.2011.03.024 Busari R.A., Olaoye J.O. (2017): Biodiesel production from castor bean seed: An optimization processing using response surface methodology. Annals Food Science and Technology, 2: 110–116. Ezugwu C.N. (2015): Renewable energy resources in Nigeria: Sources, problems and prospects. Journal of Clean Energy Technologies, 3: 68–71. https://doi.org/10.7763/JOCET.2015.V3.171 Fadeyibi A., Osunde Z.D. (2012): Mechanical behaviour of rubber seed under compressive loading. Current Trent in Technology and Science, 1: 59–61. Fadeyibi A., Ajao F.O. (2020): Design and performance evaluation of a multi-tuber peeling machine. AgriEngineering, 2: 55–71. https://doi.org/10.3390/agriengineering2010004 Fadeyibi A., Osunde Z.D., Agidi G., Evans E.C. (2014): Flow and strength properties of cassava and yam starch-glycerol composites essential in the design of handling equipment for granular solids. Journal of Food Engineering, 129: 38–46. https://doi.org/10.1016/j.jfoodeng.2014.01.006 Fakayode O.A., Ajav E.A. (2018): Development, testing and optimization of a screw press oil expeller for moringa (Mo-ringa oleifera) seeds. Agricultural Research, 8: 102–115. https://doi.org/10.1007/s40003-018-0342-6 Fakayode O.A, Ajav E.A, Akinoso R. (2016): Effects of processing factors on the quality of mechanically expressed moringa (Moringa oleifera) oil: A response surface approach. Journal of Food Process Engineering, 40: 1–12. Keyll C.R.M., Pires H.C.S., Viana L.G., Lídia S.P.M., Silva L.E.M., Rodrigues J.R.P. (2010): Development of a prototype of screw press for the collection of oil from seeds of castor and jatropha. In: 13th Brazilian Congress of Thermal Sciences and Engineering, Uberlandia, Dec 5–10, 2010: 1–8. Khurmi R.S., Gupta J.K. (2004): Machine Design. New Delhi, Eurasia Publishing House (Pvt), Ltd. Lasisi M.A. (1997): Design, construction, and testing of a groundnut oil expeller for use in a rural community. [Unpublished B.Sc. Project.] Ibadan, Faculty of Technology. University of Ibadan: 32–35. Lawal A.O., Yiljep Y.D., Abubakar S.Z. (1990): Construction of Multi-purpose Roaster. National Agricultural Extension and Research Liaison Services, Ahmadu Bello University, Zaria, Bulletin Series, 88: 1–10. Murugesan, A., Umarani C., Subramanian R., Nedunchez-hian N. (2008): Biodiesel as an alternative fuel for diesel engines – A review. Renewable and Sustainable Energy Reviews, 13: 653–662. https://doi.org/10.1016/j.rser.2007.10.007 Mutlu H., Meier M.A.R. (2010): Castor oil as a renewable resource for the chemical industry. European Journal of Lipid Science and Technology, 112: 10–30. https://doi.org/10.1002/ejlt.200900138 Ogundipe O.S., Obiakor S.I., Olotu F.B., Oyelade O.A., Aransiola J.A. (2011): Design of a low-cost cocoa oil expeller. Journal of Agricultural Engineering and Technology, 19: 17–26. Ogunniyi D.S. (2006): Castor oil: A vital industrial raw material. Bioresoure Technology, 97: 1086–1091. https://doi.org/10.1016/j.biortech.2005.03.028 Ojolo S.J., Orisaleye J.I., Ismail S.O. (2012): Design of a jathropha oil expelling machine. Journal of Emerging Trends in Engineering and Applied Sciences, 3: 412–419. Olajide J.O. (2000): Process optimization and modelling of oil expression from groundnut and sheanut kernels [Ph.D. Thesis]. Ibadan, University of Ibadan. Olaoye J.O. (2000): Some physical properties of castor nut relevant to the design of processing equipment. Journal of Agricultural Engineering Research, 77: 113–118. https://doi.org/10.1006/jaer.2000.0528 Olaoye J.O., Busari R.A. (2017): Optimization of mechanical expression of castor seeds oil (Ricinus communis) using response surface methodology. Arid Zone Journal of Engineering, Technology and Environment, 13: 878–887. Olatunde O.B., Ajav E.A., Fatukasi S.O. (2014): Design and fabrication of groundnut (Arachis hypogaea) roaster cum expeller. International Journal of Science and Technology, 3: 177–184. Olayanju T.M.A., Akinoso R., Oresanya M.O. (2006): Effect of worm shaft speed, moisture content and variety on oil recovery from expelled beni seed, Agricultural Engineering International, 7: 1–7. Poku K. (2002): Small scale palm oil processing. Available at https://agris.fao.org/agris-search/search.do?recordID =XF2016059994 Pradhan R.C., Mishra S., Naik S.N., Bhatnagar N., Vijay V.K. (2011): Oil expression from jatropha seeds using a screw press expeller. Biosystems Engineering, 109: 158–166. https://doi.org/10.1016/j.biosystemseng.2011.02.012 Singh K.K. (2005): Physical and frictional properties of orange and sweet lemon. Applied Engineering in Agriculture, 20: 821–825. https://doi.org/10.13031/2013.17715 Sreenivas P., Mamilla V.R., Sekhar K.C. (2011): Development of biodiesel from castor oil. International Journal of Energy Science, 1: 192–197. Weiss E.A. (2000): Castor. Oilseed Crops. 2nd Ed., Oxford, Blackwell Scientific, Ltd.: 13–52. Wilson R., Van Schie B.J., Howes D. (1998): Overview of the preparation, use and biological studies on polyglycerolpolyrecinoleate (PGPR). Food and Chemical Toxicology, 36: 711–718. https://doi.org/10.1016/S0278-6915(98)00057-X