Investigations supported by the Louisiana Agricultural Experimental Station through the Louisiana Sea Grant Program (NOAA, U.S. Dept. of Commerce). Presented at the 43rd Annual Meeting of the Institute of Food Technologists, New Orleans, LA, June 19–22, 1983.
Ensilage Treatment of Crawfish Waste for Improvement of Astaxanthin Pigment Extraction
Article first published online: 25 AUG 2006
Journal of Food Science
Volume 48, Issue 5, pages 1516–1520, September 1983
How to Cite
CHEN, H.-M. and MEYERS, S. P. (1983), Ensilage Treatment of Crawfish Waste for Improvement of Astaxanthin Pigment Extraction. Journal of Food Science, 48: 1516–1520. doi: 10.1111/j.1365-2621.1983.tb03528.x
- Issue published online: 25 AUG 2006
- Article first published online: 25 AUG 2006
- Ms received 3/21/83; revised 5/16/83; accepted 5/21/83
Acid ensilage treatment preserves crawfish heat-processed waste under ambient temperature conditions with stabilization of the astaxanthin pigment present. Implementation of acid ensiling prior to pigment extraction increased concentration of the astaxanthin oil extract by 40–50%, and oil recovery by 10%. A twofold increase in free amino nitrogen, and a 70% reduction in exoskeleton calcium carbonate, were observed in crawfish silage (pH 4.2) from acid/enzymatic hydrolysis, compared with controls. A correlation was seen between solubilization of calcium carbonate and pigment release in relation to silage pH. The role of acid-resistant proteolytic microorganisms in breakdown of carotenoprotein complex is discussed. Application of ensilage process for ultimate commercial production of astaxanthin-enriched vegetable or fish oils from pigment rich crustacean wastes is postulated.