Effect of temperature on the quality of refined fish co-product oil during bleaching.

Abstract

The fish co-product oil (sardine and mackerel) is rich in unsaturated fatty acids (65%), however the refining process has an adverse effect on the double bonding of unsaturated fatty acids. This study aimed to develop a better fish co-product oil refining process. The material used in this research was fish co-product oil as a product of the flour and fish oil industry and Tensil 210FF as its adsorbent. The oil was purified in three stages, degumming, neutralization and bleaching. The different bleaching temperatures (50 °C; 90 °C; 120 °C) were applied. The study showed that oil refined at 50 °C to 90 °C gave a better value of acidity (FFA), PV, anisidine number, fatty acid composition and the lowest total oxidation number.