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Continuous countercurrent salting-out extraction of 1,3-propanediol from fermentation broth in a packed column

Paper ID Volume ID Publish Year Pages File Format Full-Text
34633 45037 2013 6 PDF Available
Title
Continuous countercurrent salting-out extraction of 1,3-propanediol from fermentation broth in a packed column
Abstract

•The possibility of continuous extraction of 1,3-propanediol was evaluated.•The effect of size of packing material in packed column on extraction efficiency was evaluated.•Salting-out extraction system composed of dipotassium phosphate/ethanol was used.•The recovery of 1,3-propanediol from fermentation broth was higher than 90%.•The recovery of phosphate from raffinate phase was 94.4%.

The possibility of continuous extraction of 1,3-propanediol in a experimental packed column was investigated using a salting-out extraction system of dipotassium phosphate/ethanol. Mass transfer of 1,3-propanediol takes place from the dispersed phase (salt-rich solution) to the continuous phase (ethanol). The influences of flow rate of dispersed phase and size of packing material on partition coefficient and recovery of 1,3-propanediol were investigated and the results were compared with those obtained in spray column and test tube. Furthermore, the influences of various system compositions on hold up of dispersed phase, mass transfer coefficient, and system stability were also studied in the column packed by stainless steel Dixon 3 × 3 mm. It was found that the packed column showed a good extraction efficiency and stability. Besides, 1,3-propanediol recovery of 90.30% was obtained during a 11 h continuous operation when the real fermentation broth was used. At the same time, 94.4% of phosphate could be recovered when 0.2 volume of anhydrous ethanol was added into the raffinate phase at pH 4.0.

Keywords
1,3-Propanediol; Continuous countercurrent extraction; Packed column; Salting-out extraction system
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 48, Issue 9, September 2013, Pages 1381–1386
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