Abstract
An improved aqueous extraction method has been established for extraction of oil from corn germs. This method primarily included steam explosion pretreatment and aqueous ethanol extraction. Process variables such as steam pressure, resident time, particle size and ethanol concentration were investigated. The highest yield of 93.74 % was obtained when ground steam-exploded corn germ (1.3 MPa, 30 s, 30–35 μm particle size) was treated with 30 % (v/v) aqueous ethanol for 2 h, at 60 °C and pH 9.0. The residual oil content in water and sediment phase decreased dramatically to 4 % and 3 %, respectively. The enhancement mechanism of the process induced by steam explosion was analyzed by confocal laser scanning microscope (CLSM). The quality of extracted crude oil was also investigated. The results showed that the quality of extracted oil was superior to commercial oils.
Similar content being viewed by others
References
Codex Alimentarius Commission (2013) Codex Stan 210: Codex standard for named vegetable oils (Amendment 2013). Codex Committee on Fats and Oils, Malaysia
Campbell KA, Glatz CE (2009) Mechanisms of aqueous extraction of soybean oil. J Agric Food Chem 57:10904–10912. doi:10.1021/jf902298a
Campbell KA, Glatz CE, Johnson LA, Jung S, de Moura JMN, Kapchie V, Murphy P (2011) Advances in aqueous extraction processing of soybeans. J Am Oil Chem Soc 88:449–465. doi:10.1007/s11746-010-1724-5
Chen GZ, Chen HZ (2011) Enhancement of oil extraction from sumac fruit using steam-explosion pretreatment. J Am Oil Chem Soc 88:151–156. doi:10.1007/s11746-010-1650-6
Cheng SF, Nor LM, Chuah CH (2011) Microwave pretreatment: a clean and dry method for palm oil production. Ind Crop Prod 34:967–971. doi:10.1016/j.indcrop.2011.03.002
Cheng J, Huang R, Li T, Zhou J, Cen K (2015) Physicochemical characterization of wet microalgal cells disrupted with instant catapult steam explosion for lipid extraction. Bioresour Technol 191:66–72. doi:10.1016/j.biortech.2015.05.005
Chi Y, Zhang W, Yang R, Hua X, Zhao W (2014) Destabilization of stubborn emulsion formed during aqueous extraction improving extraction rate of total free oil from peanut. Trans Chin Soc Agric Eng 30:257–264
Chih H, James AP, Jayasena V, Dhaliwal SS (2013) Effect of growing location, malaxation duration and citric acid treatment on the quality of olive oil. J Sci Food Agric 93:1272–1277. doi:10.1002/jsfa.5881
Dickey LC, Cooke PH, Kurantz MJ, McAloon A, Parris N, Moreau RA (2007) Using microwave heating and microscopy to estimate optimal corn germ oil yield with a bench-scale press. J Am Oil Chem Soc 84:489–495. doi:10.1007/s11746-007-1051-7
Dickey LC, Kurantz MJ, Parris N (2008) Oil separation from wet-milled corn germ dispersions by aqueous oil extraction and aqueous enzymatic oil extraction. Ind Crop Prod 27:303–307. doi:10.1016/j.indcrop.2007.11.006
Dickey LC, Kurantz MJ, Johnston DB, McAloon AJ, Moreau RA (2010) Grinding and cooking dry-fractionated corn germ to optimize aqueous enzymatic oil extraction. Ind Crop Prod 32:36–40. doi:10.1016/j.indcrop.2010.02.014
Health-Canada (2009) Food and nutrition-trans fat. Health Canada. http://www.hc-sc.gc.ca/fn-an/nutrition/gras-trans-fats/index-eng.php.
Jr. HMF, Pessen H, Brown EM, Kumosinski TF (1990) Structural insights into the bovine casein micelle: small angle X-ray scattering studies and correlations with spectroscopy. J Dairy Sci 73:3592–3601
Kadioglu SI, Phan TT, Sabatini DA (2011) Surfactant-based oil extraction of corn germ. J Am Oil Chem Soc 88:863–869. doi:10.1007/s11746-010-1719-2
Karlovic DJ, Bocevska M, Jakovlevic J, Turkulov J (1994) Corn germ oil extraction by a new enzymatic process. Acta Aliment Hung 23:389–400
Kumar D, Murthy GS (2011) Impact of pretreatment and downstream processing technologies on economics and energy in cellulosic ethanol production. Biotechnol Biofuels 4:1–19. doi:10.1186/1754-6834-4-27
Kwiatkowski JR, Cheryan M (2002) Extraction of oil from ground corn using ethanol. J Am Oil Chem Soc 79:825–830. doi:10.1007/s11746-002-0565-8
Lichtenstein AH (2014) Dietary trans fatty acids and cardiovascular disease risk: past and present. Curr Atheroscler Rep 16:433
Long J, Fu Y, Zu Y, Li J, Wang W, Gu C, Luo M (2011) Ultrasound-assisted extraction of flaxseed oil using immobilized enzymes. Bioresour Technol 102:9991–9996. doi:10.1016/j.biortech.2011.07.104
Miñana-Perez M, Graciaa A, Lachaise J, Salager J-L (1995) Solubilization of polar oils with extended surfactants. Colloids Surf, A 100:217–224. doi:10.1016/0927-7757(95)03186-h
Moreau RA (2011) Corn oil. In: Gunstone FD (ed) Vegetable oils in food technology, second edn. Wiley-Blackwell, New Jersey, pp. 273–289
Moreau RA, Hicks KB (2005) The composition of corn oil obtained by the alcohol extraction of ground corn. J Am Oil Chem Soc 82:809–815
Moreau RA, Johnston DB, Hicks KB (2005) The influence of moisture content and cooking on the screw pressing and prepressing of corn oil from corn germ. J Am Oil Chem Soc 82:851–854
Moreau RA, Dickey LC, Johnston DB, Hicks KB (2009) A process for the aqueous enzymatic extraction of corn oil from dry milled corn germ and enzymatic wet milled corn germ (E-Germ). J Am Oil Chem Soc 86:469–474. doi:10.1007/s11746-009-1363-x
Ostlund RE, Racette SB, Okeke A, Stenson WF (2002) Phytosterols that are naturally present in commercial corn oil significantly reduce cholesterol absorption in humans. Am J Clin Nutr 75:1000–1004
Rebolleda S, Rubio N, Beltran S, Teresa Sanz M, Luisa Gonzalez-Sanjose M (2012) Supercritical fluid extraction of corn germ oil: study of the influence of process parameters on the extraction yield and oil quality. J Supercrit Fluids 72:270–277. doi:10.1016/j.supflu.2012.10.001
Shah S, Sharma A, Gupta MN (2005) Extraction of oil from Jatropha curcas L. seed kernels by combination of ultrasonication and aqueous enzymatic oil extraction. Bioresour Technol 96:121–123. doi:10.1016/j.biortech.2004.02.026
Shi Y, Ma Y, Zhang R, Ma H, Liu B (2015) Preparation and characterization of foxtail millet bran oil using subcritical propane and supercritical carbon dioxide extraction. J Food Sci Technol 52:3099–3104. doi:10.1007/s13197-014-1311-0
Singh J, Suhag M, Dhaka A (2015) Augmented digestion of lignocellulose by steam explosion, acid and alkaline pretreatment methods: a review. Carbohydr Polym 117:624–631. doi:10.1016/j.carbpol.2014.10.012
Taghvaei M, Jafari SM, Nowrouzieh S, Alishah O (2015) The influence of cooking process on the microwave-assisted extraction of cottonseed oil. J Food Sci Technol 52:1138–1144. doi:10.1007/s13197-013-1125-5
Tonin C, Zoccola M, Aluigi A, Varesano A, Montarsolo A, Vineis C, Zimbardi F (2006) Study on the conversion of wool keratin by steam explosion. Biomacromolecules 7:3499–3504. doi:10.1021/bm060597w
Wang SZ, Sun SH (2014) Research progress of trans-fatty acids quality control in maize oil. Cereal & Food Ind 21:18–21
Yu ZD, Zhang BL, Yu FQ, Xu GZ, Song AD (2012) A real explosion: the requirement of steam explosion pretreatment. Bioresour Technol 121:335–341. doi:10.1016/j.biortech.2012.06.055
Zhang YQ, Yang RJ, Zhao W (2014) Improving digestibility of feather meal by steam flash explosion. J Agric Food Chem 62:2745–2751. doi:10.1021/jf405498k
Zhao W, Yang RJ, Zhang YQ, Wu L (2012) Sustainable and practical utilization of feather keratin by an innovative physicochemical pretreatment: high density steam flash-explosion. Green Chem 14:3352–3360. doi:10.1039/c2gc36243k
Zoulikha M-R, Thierry M, Qiuyu ZJ-M, Nouviaire A, Sid-Ahmed R (2015) Combined steam-explosion toward vacuum and dilute-acid spraying of wheat straw. Impact of severity factor on enzymatic hydrolysis. Renew Energy 78:516–526. doi:10.1016/j.renene.2015.01.038
Acknowledgments
The authors gratefully acknowledge the supported by the National High Technology Research and Development Program of China (2013AA102103). This study was also supported by the Natural Science Foundation of Jiang Su Province (BK2012116).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Ni, S., Zhao, W., Zhang, Y. et al. Efficient and eco-friendly extraction of corn germ oil using aqueous ethanol solution assisted by steam explosion. J Food Sci Technol 53, 2108–2116 (2016). https://doi.org/10.1007/s13197-016-2189-9
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13197-016-2189-9