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| Optimization of oil extraction process of enzyme-assisted cold-pressing from corn germ |
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| DOI： |
| KeyWord:corn germ enzymatic hydrolysis cold-pressing oil yield physicochemical index |
| FundProject:黑龙江省省属高校基本科研业务费项目（135409408） |
| Author Name | Affiliation | | ZHAO Yue1,2,3, HU Xiaoqian1, REN Jian1,2,3, SUN Yang1,2,3 | 1.College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, Heilongjiang, China
2.Engineering Research Center of Plant Food Processing Technology of Ministry of Education,
Qiqihar 161006, Heilongjiang, China
3.Key Laboratory of Corn Deep Processing Theory
and Technology in Heilongjiang Province, Qiqihar 161006, Heilongjiang, China |
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| Abstract: |
| In order to improve the comprehensive utilization value of corn germ as a by-product of grain processing, the extraction conditions of corn oil by enzyme-assisted cold-pressing method were optimized by single factor test and orthogonal test with corn germ as raw material and oil yield as index, and the basic physicochemical indexes of corn oil prepared under the optimal conditions were analyzed. The results showed that the optimal conditions for extracting corn oil by enzyme-assisted cold-pressing method were as follows: enzymatic hydrolysis water content 12%, cellulase dosage 0.5%, alkaline protease dosage 10%, enzymatic hydrolysis temperature 45 ℃,enzymatic hydrolysis time 6 h, pressing temperature 60 ℃, pressing pressure 50 MPa, and pressing time 60 min. Under these conditions, the oil yield was 41.89%, which was higher than that of conventional cold-pressing method (39.68%). The corn oil produced was clear, transparent and brown-red, and its physicochemical indexes basically met the national standard of third grade corn oil. In general, the enzyme-assisted cold-pressing method can obtain corn oil with good quality, and its oil yield is higher than that of conventional cold-pressing method. |
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