SHORT COMMUNICATION
Removal of fat from crushed black soldier fly larvae by carbon dioxide supercritical extraction
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Gene Analysis Center, Gyeongnam National University of Science and Technology, 33 Dongjin-ro, Jinju-city 52725, South Korea
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Laboratory of Aquatic Animal Diseases, College of Veterinary Medicine, Gyeongsang National University, 501 Jinju-daero, Jinju-city 52828, South Korea
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Department of Pharmaceutical Engineering, Gyeongnam National University of Science and Technology, 33 Dongjin-ro, Jinju-city 52725, South Korea
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Gyeongsangnam-do Agricultural Research and Extension Services, 570 Daesin-ro, Jinju-city, 52733, South Korea
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Swine Science and Technology Center, Gyeongnam National University of Science & Technology, 33 Dongjin-ro, Jinju-city 52725, South Korea
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Inland Aquaculture Research Center, National Institute of Fisheries Science, 645-806 Gyeongnam, South Korea
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Korea Aquatic Life Institute Co.Ltd, Geumjeong-ro 90, Geumjeong-ku, Busan-city 46290, South Korea
CORRESPONDING AUTHOR
J. H. Yoo   

Korea Aquatic Life Institute Co.Ltd, Geumjeong-ro 90, Geumjeong-ku, Busan-city 46290, South Korea
Publication date: 2019-03-22
 
J. Anim. Feed Sci. 2019;28(1):83–88
 
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ABSTRACT
The larvae of the black soldier fly, Hermetia illucens, contain high amounts of protein and fat, and so are a good feed source. However, this high fat content hinders the production of such feed. The excess fat must thus be removed to enable the larvae to be used as a feedstock e.g., for aquaculture and livestock. Firstly, the use of hot water treatment as a strategy for extracting fat from dried larvae was tested. It was found that this process reduced the fat content of the raw material (from 30 to about 16%). However, the resulting product was still not suitable for feed processing. Next, the use of a carbon dioxide supercritical extraction system on crushed larvae was studied. This system time-dependently reduced the fat content to less than 6.6% and less than 4.6% after treatments for 2 and 6 h, respectively, with a pressure of 350 bar used on larval particles of 10–18 mesh in size. Therefore, subjecting 10–18 mesh crushed larval powder to carbon dioxide supercritical extraction at 350 bar for 6 h yielded a larval powder with a fat content of 5% or less. Based on this finding, this method is proposed to be a suitable alternative for further processing of larvae feedstock.
 
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ISSN:1230-1388