Strategy to Overcome Effect of Raw Materials on Enzymatic Process of Biodiesel from Non-edible Oils Using Candida sp. 99᾿25 Lipase

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• 作者：Kaili Nie ; Fang Wang ; Tianwei Tan ; Luo Liu
• 关键词：Acid value ; Biodiesel ; Lipase ; Non ; edible oils ; Raw materials
• 刊名：Applied Biochemistry and Biotechnology
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：177
• 期：5
• 页码：1176-1185
• 全文大小：829 KB
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• 作者单位：Kaili Nie (1) (2)
  Fang Wang (1) (3)
  Tianwei Tan (1)
  Luo Liu (1)
  
  1. Beijing Bioprocess Key Laboratory, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China
  2. Amoy-BUCT Industrial Bio-technovation Institute, Amoy, 361022, People’s Republic of China
  3. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Biotechnology
  Biochemistry
  
• 出版者：Humana Press Inc.
• ISSN：1559-0291

文摘

Non-edible oils are preferred raw materials for biodiesel production. However, the properties of raw materials significantly affect the synthesis process, leading to difficulties to design one process suitable for any kind of raw material. In this study, the composition of five typical non-edible oils was analyzed. The major difference was the content of free fatty acids, reflected from their acid values. The influence of different oils was investigated by using lipase from Candida sp. 99–125. At low lipase dosage and low water content, the conversion was found proportional to the acid value. However, by increasing the water content or lipase dosage, we observed that the conversions for all kinds of oils used in this study could exceed 80 %. Time course analysis indicates that the lipase used in this study catalyzed hydrolysis followed by esterification, rather than direct transesterification. Accumulation of free fatty acids at the very beginning was necessary. A high water content facilitated the hydrolysis of oils with low acid value. This lipase showed capability to transform all the oils by controlling the water content.