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- Title
含硅镁型混合脱色剂在醍鱼油脱色 及助滤中的作用.
- Authors
黎稳; 俞骏; 谢宸伟; 陶宁萍
- Abstract
Objective: This study aimed to improve the separation elliciency of decolorizing agent and fish oil, and ensure high decolorization rate at the same time. Methods: The optimum absorption wavelength of fish oil was measured by spectrophotometer Magnesium silicate was mixed with activated clay into compound decolorizers, and was used to evaluate the decolorization rate and filtration speed. The decolorization parameters of anchovy oil were optimized by single lactor experiment and. response surlace experiment. The oil absorption rate and lish oil recovery rate of decolorizing agent were calculated. The decolorization and filter aid effect of decolorizing agent were verified through the plate and frame filter scale-up experiment. Fatty acid absolute content of crude oil, degummed oil, deacidified oil, and bleached oil was determined by gas chromatography. Results: The best absorption wavelength of anchovy oil was 671 nm. The compound results of mixed decolorizer was as follows: the ratio of activated clay: magnesium silicate was 4: 1 and its filtration rate was (26.65士 0.64) mL/min. Response surlace optimization results showed that the decolorization rale was (95.74± 1.35) %, al the dosage of 5.0%, 57 min, and 72 °C. The oil absorption rate was (1.15士 0.10) % and lish oil recovery was (91.了2 ± 1.60) %. In the plate and frame filtration experimentthe decolorization ellect of the mixed decolorizer was not sign让icantly dillerent Irom the control group, but it had a faster liltration rate. The absolute content of SFA and MUFA in crude oil, degummed oil, deacidified oil, and bleached oil had no significant dillerence. Increasing Irom (H7.42±0.23) mg/g and (65. 20 ±2.31) mg/g to (12& 97 士 0.86) mg/g and (68.62 ±1.59) mg/g, the absolute content of EPA and DIIA in bleached oil increased signilicantly. Conclusion: Magnesium silicate is an elleclive filter aid and has adsorption ellect. Its combination with activated clay can ensure the decolorization ellect of fish oil. Additionally, it can solve the problem of blocking the filter cake of separating the decolorizing agent and fish oil by the plate and frame filter press. The mixed decolorizing agent has the advantages of low oil absorption, high decolorization eCCiciency, and last liltration speed.
- Subjects
FISH oils; MAGNESIUM silicates; PETROLEUM; GAS chromatography; FATTY acids
- Publication
Food & Machinery, 2023, Issue 8, p166
- ISSN
1003-5788
- Publication type
Article
- DOI
10.13652/j.spjx.1003.5788.2023.80137