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Stripping of nonionic surfactants from the coacervate phase of cloud point system for lipase separation by Winsor II microemulsion extraction with the direct addition of alcohols

Paper ID Volume ID Publish Year Pages File Format Full-Text
35684 45101 2010 6 PDF Available
Title
Stripping of nonionic surfactants from the coacervate phase of cloud point system for lipase separation by Winsor II microemulsion extraction with the direct addition of alcohols
Abstract

Extractive microbial fermentation of lipase by Serratia marcescens ECU1010 in cloud point system was previously carried out in the cloud point system. The direct addition of different alcohols, including iso-butanol, 2-phenylethanol and 1-octanol, into the coacervate phase of the clear supernatant of the fermentation broth formed microemulsion, where the nonionic surfactants and lipase were unevenly partitioned between the different phases in the microemulsion system. The polarity of alcohols strongly affected the microemulsion type at room temperature condition. The results indicated that the Winsor II microemulsion, formed by the addition of iso-butanol or 2-phenylethanol as the organic solvent, favored the stripping of the nonionic surfactant into the Om phase, whereas the lipase was left in the excess aqueous phase. However, the Winsor I microemulsion, formed by the addition of 1-octanol as the organic solvent, failed to separate the lipase from the nonionic surfactant in the coacervate phase of cloud point system, because the nonionic surfactant and lipase were partitioned into the Wm phase at the same time. Moreover, in the Winsor II microemulsion extraction with 2-phenylethanol as the organic solvent, in which case the protein–surfactant complexes were absent at the interface between the Om phase and the excess aqueous phase, the high lipase recovery (above 80%) and good nonionic surfactant removal were achieved. The effect of nonionic surfactants on lipase activity was also presented.

Keywords
Alcohol; Cloud point system; Winsor II microemulsion; Back-extraction; Lipase
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Stripping of nonionic surfactants from the coacervate phase of cloud point system for lipase separation by Winsor II microemulsion extraction with the direct addition of alcohols
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 45, Issue 5, May 2010, Pages 771–776
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us