METHOD FOR PRODUCING OILS AND FATS CONTAINING DOCOSAHEXAENOIC ACID PRODUCED BY MICROALGA BELONGING TO GENUS AURANTIOCHYTRIUM

摘要

PROBLEM TO BE SOLVED: To provide a method of producing oils and fats having a step of extracting and separating oils and fats containing a higher unsaturated fatty acid such as docosahexaenoic acid (DHA) produced by microalga belonging to the genus Aurantiochytrium.;SOLUTION: A culture liquid obtained by culturing microalga belonging to the genus Aurantiochytrium in a salt-containing culture medium is mixed with an organic solvent without pretreatment such as concentration, dehydration, or desiccation, and oils and fats including DHA, etc. are extracted in the organic solvent when the cell membrane of the culture alga contained in the culture liquid is crushed. The oils and fats are separated in the extraction solvent phase, the crushed algal residue is separated in the dehydrated solid phase, and the culture liquid is separated in the drainage phase. After washing with water and removing contaminants contained in the extraction solvent phase such as salts and gum, the extraction solvent phase is treated with a solvent separation and recovery system and solvent is separated and recovered from oils and fats and recycled. The separated oils and fats is made into oil and fat products by separation and removal treatment from remaining solvent, and through purification treatment such as deoxidation and decoloration.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT