title: Combined effect of ohmic heating and enzyme assisted aqueous extraction process on soy oil recovery.
abstract: This research describes a new technological process for soybean oil extraction. The process deals with the combined effect of ohmic heating and enzyme assisted aqueous oil extraction process (EAEP) on enhancement of oil recovery from soybean seed. The experimental process consisted of following basic steps, namely, dehulling, wet grinding, enzymatic treatment, ohmic heating, aqueous extraction and centrifugation. The effect of ohmic heating parameters namely electric field strength (EFS), end point temperature (EPT) and holding time (HT) on aqueous oil extraction process were investigated. Three levels of electric field strength (i.e. OH600V, OH750V and OH900V), 3 levels of end point temperature (i.e. 70, 80 and 90 °C) and 3 levels of holding time (i.e. 0, 5 and 10 min.) were taken as independent variables using full factorial design. Percentage oil recovery from soybean by EAEP alone and EAEP coupled with ohmic heating were 53.12 % and 56.86 % to 73 % respectively. The maximum oil recovery (73 %) was obtained when the sample was heated and maintained at 90 °C using electric field strength of OH600V for a holding time of 10 min. The free fatty acid (FFA) of the extracted oil (i.e. in range of 0.97 to 1.29 %) was within the acceptable limit of 3 % (oleic acid) and 0.5-3 % prescribed respectively by PFA and BIS.
authors.affiliation: Department of Food Engineering, Indian Institute of Crop Processing Technology, Thanjavur, TN 613005 India.
authors.forename: Akash
authors.initials: A
authors.lastname: Pare
authors.affiliation: Department of Post Harvest Process and Food Engineering, College of Agricultural Engineering, JNKVV, Jabalpur, 482004 MP India.
authors.forename: Anurag
authors.initials: A
authors.lastname: Nema
authors.affiliation: Department of Post Harvest Process and Food Engineering, College of Agricultural Engineering, JNKVV, Jabalpur, 482004 MP India.
authors.forename: V K
authors.initials: VK
authors.lastname: Singh
authors.affiliation: Department of Post Harvest Process and Food Engineering, College of Agricultural Engineering, JNKVV, Jabalpur, 482004 MP India.
authors.forename: B L
authors.initials: BL
authors.lastname: Mandhyan
keywords: EAEP; Electric field strength; End point temperature; Holding time; Ohmic heating; Percentage oil recovery and FFA
references.citation: Enzyme Microb Technol. 2001 Apr 5;28(6):499-509
references.pmid: 11267644
references.citation: Bioresour Technol. 2004 Apr;92(2):157-61
references.pmid: 14693448