Extraction of omega-3 fatty acids and astaxanthin from Brazilian redspotted shrimp waste using supercritical CO2 + ethanol mixtures

作者：Sanchez Camargo Andrea P; Meireles M Angela A; Ferreira Ana L K; Saito Erika; Cabral Fernando A^*

来源：Journal of Supercritical Fluids, 2012, 61: 71-77.

DOI：10.1016/j.supflu.2011.09.017

• Shrimp waste
• Supercritical extraction
• Astaxanthin
• omega-3 Fatty acids
• Entrainer

In this study, the effect of ethanol addition to supercritical carbon dioxide (scCO(2)) on the extraction of astaxanthin and omega-3 fatty acid (EPA + DHA, mainly) from redspotted shrimp waste (Farfantepenaeus paulensis) was investigated. The co-solvent was used in the ratios of 5, 10 and 15% wt. and the conditions of temperature and pressure (300 bar and 50 degrees C) were adopted according to results achieved of the highest total extraction yield of lipids and astaxanthin in preliminary tests without the use of co-solvent. Results showed that the addition of ethanol conferred a significant improvement on the extraction yields of lipids and astaxanthin, and also increased the proportion of omega-3 fatty acids in the lipids of the extracts. An increase of 136% was reaching in the total lipid extraction yield when the proportion of ethanol was increased from 5% to 15% wt. Maximum recoveries of 93.8% and 65.2% for lipids and astaxanthin, respectively, with regard to the initial content in the waste occurred when the condition using the maximum proportion (15% wt.) of ethanol in the scCO(2)/ethanol mixture was used. The best results for the recovery of EPA and DHA were also obtained under this condition, showing that supercritical extraction employing entrainers could be a competitive technology as compared to organic solvent extraction.

• 出版日期2012-1