ARS | Publication request: OIL PRODUCTION FROM CATFISH VISCERA

Submitted to: Journal of the American Oil Chemists' Society
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 4, 2003
Publication Date: April 1, 2003
Citation: Sathivel, S., Prinyawiwatkul, W., King, J., Grimm, C.C., Lloyd, S.W. 2003. OIL PRODUCTION FROM CATFISH VISCERA. Journal of the American Oil Chemists' Society. JAOCS 80(4):377-382.

Interpretive Summary: Catfish guts are unused by-products of the catfish processing industry. There are economic and environmental problems associated with their proper disposal. This research describes the fish oil recovered from catfish and compares it with menhaden oil. Although lower in omega 3 fatty acids due its fresh water source, the catfish oil is rich in unsaturated fatty acids. This research will aid those trying to develop value added products from catfish by-products.

Technical Abstract: Catfish oil was extracted from viscera and purified (degummed, neutralized, bleached, and deodorized). The yield of catfish oil after purification was 65.7%. The major yield loss took place during the degumming process. FA found in crude catfish visceral oil were C14:0, C16:0, C16:1, C18:0, C18:1, C18:2, C18:3, C20:0, C20:1, C20:2, C20:3, C20:4, and C22:6, the predominant FA being C18:1, C16:0, C18:2, and C18:0. The total unsaturated FA in the purified catfish oil amounted to 67.7%. The combined n-3 FA content of the purified catfish oil was 4.6 mg/g of oil. The purified catfish oil contained 1.21 mg/g DHA. Free fatty acid, water activity, and some minerals were decreased during purification. Bleaching removed pigment, thus resulting in oil with greater lightness and less yellowness.