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Preparation and Characterization of Nanofiltration Membranes for Recovery of Organic Acids from Fermentation Broth  

Hwang, Yoon Sung (WCU Department of Energy Engineering, Hanyang University)
Cho, Young Hoon (WCU Department of Energy Engineering, Hanyang University)
Park, Ho Bum (WCU Department of Energy Engineering, Hanyang University)
Publication Information
Membrane Journal / v.23, no.4, 2013 , pp. 304-311 More about this Journal
Abstract
In fermentation-separation processes, nanofiltration membrane processes can be used to separate organic acid and other byproducts such as sugars and proteins. In this study, new nanofiltration membranes were prepared to improve organic acid permeability during the separation processes of fermentation broth. Positively charged nanofiltration membrane was introduced to reduce lactic acid rejection by electrostatic attraction between lactic acid and nanofiltration membrane. Newly fabricated nanofiltration membranes were prepared by grafting cationic polyelectrolyte, PEI, on membrane surface. Thenanofiltration membranes showed positively charged surface potential. As a result, lactic acid rejection was remarkably reduced while the rejection of glucose was not changed significantly.
Keywords
fermentation broth; lactic acid; nanofiltration; interfacial polymerization; polyelectrolyte grafting; positively charged membrane;
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Times Cited By KSCI : 1  (Citation Analysis)
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