The bleached microalgae DH A oil was deodorized in a self - designed deodorization equipment. Under the deodorization conditions of temperature of 180t ,time of 5 h and pressure of -0. 1 MPa,the effects of different amount of steam on the acid value,peroxide value,soap content,unsaponifiable matter, DHA content, sterol content and color of microalgae DHA oil were investigated by adjusting the amount of steam in deodorization process. The result indicated that the peroxide value,acid value,soap content,unsaponifiable matter, sterol content and the color of the microalgae DHA oil decreased with the increase of the amount of stripping steam,meanwhile,the oil loss increased. During the processing,the DHA content exhibited no significant difference.%在自行设计的脱臭装置上对微藻DHA脱色油进行脱臭处理.在脱臭温度180℃、脱臭时间5h、脱臭压力-0.1 MPa的条件下,通过调节脱臭过程中的蒸汽量,考察了不同蒸汽量对微藻DHA油脂酸值、过氧化值、含皂量、不皂化物、DHA含量、甾醇含量以及色泽的影响.结果表明:随着汽提蒸汽量的增加,DHA油脂的过氧化值、酸值、含皂量、不皂化物、甾醇含量以及色泽均随之降低,DHA油脂的损耗随之增加,但不同的汽提蒸汽量对DHA含量影响却不大.
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