title: Efficient and eco-friendly extraction of corn germ oil using aqueous ethanol solution assisted by steam explosion.
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.
authors.affiliation: State Key Laboratory of Food Science & Technology and School of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi, 214122 China.
authors.forename: Shuangshuang
authors.initials: S
authors.lastname: Ni
authors.affiliation: State Key Laboratory of Food Science & Technology and School of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi, 214122 China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Food Science & Technology and School of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi, 214122 China.
authors.forename: Yiqi
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Food Science & Technology and School of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi, 214122 China ; Department of Nutrition & Food Technology, Faculty of Science and Technology, Omdurman Islamic University, P.O. Box 382, 14415 Omdurman, Khartoum Sudan.
authors.forename: Mohammed A A
authors.initials: MA
authors.lastname: Gasmalla
authors.affiliation: State Key Laboratory of Food Science & Technology and School of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi, 214122 China.
authors.forename: Ruijin
authors.initials: R
authors.lastname: Yang
keywords: Aqueous ethanol extraction; Corn germ; Free oil yield; Steam explosion pretreatment