Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (5): 68-71.

• Biological Engineering • Previous Articles     Next Articles

Enzymatic Transesteri6catiOn of Waste Oil Under Ultrasonic Irradiation

Wu Hong  zong Min-hua  Lou Wen-yong Chen Zhi-fen   

  1. Dept.of Biotechnology,South China UniV of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-03-28 Online:2006-05-25 Published:2006-05-25
  • Contact: 吴虹(1971-)，女，讲师，主要从事生物合成与生物转化的研究 E-mail:bbhwn@scut.edu.cn
  • About author:吴虹(1971-)，女，讲师，主要从事生物合成与生物转化的研究
  • Supported by:

    广东省科技计划项目(2003C33102)；广州市科技计划项目(2005Z3-130471)

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Abstract:

Aiming at the Novozym 435-catalyzed transesteri cation of waste oil in a solvent-free system under ultra.sonic irradiation.the effects of ultrasonic power and radiation mode on the reaction rate and the operation stability were investigated.It is found that the reaction rate of Novozym 435.catalyzed transesterification of waste oiL is remarkably accelerated by pretreatment of enzyme with uhrasonic irradiation at 20 kHz.80 W for 30 min.and that Novozym 435 pretreated with uhrasonic irradiation is of good operation stability because its activity weakens little even after 10 batch operations.

Key words: uhrasonic iradiation；, lipase, waste oil, transestefification