Extraction by Dry Rendering Methode and Characterization Fish Oil of Catfish Viscera Fat by Product of Smooked Fish Processing

Abstract

Abstract The catfish viscera fat, is cathfish processing by-products, has potential to be used as a source of raw material for production of fish oil. This study aimed to analyze the value of proximate, heavy metal content and fatty acid profile of catfish viscera fat (Pangasius hypopthalmus) and characterized fish oil extracted by dry rendering in various temperature and time than compared it to fish oil extracted by stove heating to obtain the best treatment. Proximate, heavy metal residue, and the fatty acid profile analysis were conducted for characterizing catfish viscera fat. Fish oil extraction was conducted by dry rendering in various temperatures of 50, 60, 70, 80 °C for 1, 2, and 3 hours. Fish oil quality was determined by the chemical characteristics i.e. PV, FFA, anisidin and TOTOX. The results of the study showed that fat content of catfish fat viscera was 88.19 %, the heavy metals content was below SNI standart to be consumed, and fatty acid profile composition was SFA>MUFA>PUFA. The highest fatty acid content was oleic acid. The best fish oil quality was resulted on temperature extraction of 50°C for 2 hours with yield value, PV, FFA, anisidin, and TOTOX were 45.17 %, 2.77 meq/kg, 0.83 %, 2.86 meq/kg, 8.39 meq/kg respectively. This result was not significantly different with fish oil extracted by the stove heating expect for yield and PV were 80.11% and 6.52 meq/kg, respectively.