文献类型：期刊文献

英文题名：Recovering high value-added substances from corn distillers dried grains with solubles: a semi-continuous countercurrent downstream processing method

作者：Gu, Jiahui[1];Xin, Zhong[1];Meng, Xin[1];Sun, Shuzhen[2];Qiao, Qingan[2];Deng, Hongbo[2]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Jilin Fuel Alcohol Co Ltd, Jilin 132101, Jilin, Peoples R China

年份：2016

卷号：91

期号：5

起止页码：1327

外文期刊名：JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY

收录：;EI(收录号：20152500949020);WOS:【SCI-EXPANDED(收录号:WOS:000373611600015)】；

基金：This work was funded by the National High Technology Research and Development Program of China, Grant No. 2009AA05Z404 and Jilin Fuel Alcohol Co., Ltd.

语种：英文

外文关键词：corn DDGS; semi-continuous extraction; downstream processing; corn oil; zein; carotenoid

摘要：BACKGROUNDRecovering high value-added substances (oil, zein and carotenoids) from corn distillers dried grains with solubles (DDGS), the major coproduct of bioethanol, is important to enhance the profit of the corn ethanol process. Currently, few studies have been reported on separating high value-added substances in a process suitable for industrialization. In this article, a semi-continuous countercurrent extraction method was investigated to refine the corn DDGS. RESULTSFirst, an oil yield as high as 94.5% (based on oil content in DDGS) was measured using a series of five packed columns. Second, the DDGS residues after oil extraction were used for zein extraction, obtaining a zein yield of 24.5% (based on protein content in DDGS) with a series of four packed columns. Moreover, the carotenoids in zein were extracted by anhydrous ethanol in a Soxhlet apparatus. The extractives, which accounted for 17% of the original mass of zein, had a carotenoids content of 2.4 mg g(-1). Finally, zein was decolored by hydrogen peroxide to form a whiter product. CONCLUSIONSThe semi-continuous countercurrent method was developed successfully to refine the corn DDGS. The corn oil with high acid value was a perfect feedstock for biodiesel. The zein obtained achieved the quality of a commercial product. (c) 2015 Society of Chemical Industry