Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Bleaching of Lipids Extracted from Single Cell Oil Produced by Mortierella sp.

모르티에렐라(Mortierella)속 유래 단세포유지로부터 추출한 지방질의 탈색

  • Received : 2015.03.18
  • Accepted : 2015.04.20
  • Published : 2015.06.30
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Abstract

The deacidified oil obtained from the oleaginous fungus, Mortierella sp. (M-12) was bleached, after degumming, using activated clay under a 50-100 mmHg vacuum. The bleaching conditions were partially optimized as follows: activated clay, 1%, bleaching temperature $90^{\circ}C$, and treatment time 20 min. After bleaching, the color of bleached oil as determined by the Lovibond Tintometer, satisfied the specification for edible fats and oils. The bleaching process also decreased the contents of free fatty acids and phosphorus in the deacidified oil. The acid value of the bleached oil also satisfied the specification for edible fats and oils. It was early shown that the normal bleaching process can be used for the bleaching of heavily-colored microbial lipids for human consumption.

아라키돈산을 고농도로 함유한 유지를 생산하는 Mortierella sp. M-12로부터 얻은 균체 지방질을 식용에 적합하도록 정제하기 위하여 탈색 공정을 최적화하였다. 동결건조한 균체로부터 Folch's solvent를 사용하여 균체 지방질 조유를 얻은 후 탈검과 탈산을 거쳐 얻은 탈산유를 50-100 mmHg 진공 하에서 탈색을 진행하였다. 활성백토를 1% 수준으로 첨가하여 $90^{\circ}C$에서 20분간 수행하였을 때 식용유지 규격에 적합한 색상을 갖는 탈색유를 얻을 수 있었다. 탈색 공정 중에 부수적으로 일어난 탈검과 탈산 작용으로 인하여 탈색유의 인 함량은 31.7% 감소하였으며, 산값은 0.5로 감소하여 식용유지의 규격에 적합한 수준이 되었다. 모르티에렐라 단세포유지는 일반적인 유지의 탈색공정을 통하여 식용급 동식물 유지와 같은 수준의 탈색유를 얻을 수 있었다.

Keywords

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