Techno Press
You logged in as You Query in as select * from journal_mwt where volume=1 and num=2 and ordernum=5 Techno Press

Membrane Water Treatment
  Volume 1, Number 2, April 2010 , pages 159-169
DOI: https://doi.org/10.12989/mwt.2010.1.2.159
 


Dialysis in parallel-flow rectangular membrane modules with external reflux for improved performance
Ho-Ming Yeh, Tung-Wen Cheng and Kuan-Hung Chen

 
Abstract
    The effect of external recycle on the performance of dialysis in countercurrent-flow rectangular membrane modules was investigated both theoretically and experimentally. Theoretical analysis of mass transfer in parallel-flow device with and without recycle is analogous to heat transfer in parallel-flow heat exchangers. Experiments were carried out with the use of a microporous membrane to dialyze urea aqueous solution by pure water. In contrast to a device with recycle, improvement in mass transfer is achievable if parallel-flow dialysis is operated in a device of same size with recycle which provides the increase of fluid velocity, resulting in reduction of mass-transfer resistance, especially for rather low feed volume rate.
 
Key Words
    dialysis; external recycle; parallel flow.
 
Address
Ho-Ming Yeh, Tung-Wen Cheng and Kuan-Hung Chen; Department of Chemical and Materials Engineering, Tamkang University, Tamsui, Taipei 25137, Taiwan
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2022 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: info@techno-press.com