Effect on decolorizing for the quality of crude fish oil

To appropriately use different kinds of crude fish oil resouces, selected pressing oil, weak alkaline cooking oil and solvent extraction oil respectively, each of them divide into 3 types:stored for one day, one week and one month. By single factor and orthogonal test determined the best decoloring conditions:using3.5% of active clay and 0.3% of active carbon at 95℃ for 30min.The ratio of decolourization was 90.7%.As a result:the processing period of fish oil is less than a week. For decoloring of the pressing oil and weak alkaline cooking oil, we just use carclazyte, but for the solvent extraction oil, we must use carclazyte and active carbon.