Modification of bi-composite membrane support layer by macro puncture for membrane distillation application

Title
Modification of bi-composite membrane support layer by macro puncture for membrane distillation application
Authors
이석헌정성필김홍석이강호
Keywords
Membrane distillation; Modification of support layer; Macro punctures; DCMD; Tensile strength
Issue Date
2016-05
Publisher
Desalination
Citation
VOL 385, 106-116
Abstract
Membrane distillation (MD) is a thermally driven membrane process. For MD application, a hydrophobic and porousmembrane is required. A bi-compositemembrane has been introduced for manyMDapplications because of its superior membrane performance, especially flux. In this research, in order to increase the flux of a commercial bi-composite membrane, various macro punctures were formed in the support layer. The modified MD membranes were tested in a direct contact membrane distillation (DCMD) configuration. The flux of a modified membrane was affected by the size and location of macro punctures and overall porosity in the support layer. The flux of amodifiedmembranewas enhanced up to 27% comparedwith that of pristine membranewhen the size of the macro puncture and overall porosity of the support layer were larger than 20mm2 and 60%, respectively. The overall porosity and size and location of macro punctures in the support layer affected the flux due to the turbulent production in the permeate side. The membrane integritywas checked not only by the tensile strength of the modified membrane samples but also by the long term operation by using the secondary effluent of the wastewater treatment plant as a feed.
URI
http://pubs.kist.re.kr/handle/201004/59219
ISSN
00119164
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KIST Publication > Article
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