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Recovery of Lactic Acid from Fermentation Broth by the Two-Stage Process of Nanofiltration and Water-Splitting Electrodialysis  

Lee, Eun-Gyo (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology)
Kang, Sang-Hyeon (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology)
Kim, Hyun-Han (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology)
Chang, Yong-Keun (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Biotechnology and Bioprocess Engineering:BBE / v.11, no.4, 2006 , pp. 313-318 More about this Journal
Abstract
A two-stage process of nanofiltration and water-splitting electrodialysis was investigated for lactic acid recovery from fermentation broth. In this process, sodium lactate is isolated from fermentation broth in the first stage of nanofiltration by using an NTR-729HF membrane, and then is converted to lactic acid in the second stage by water-splitting electrodialysis. To determine the optimal operating conditions for nanofiltration, the effects of pressure, lactate concentration, pH, and known added impurities were studied. Lactate rejection was less than 5%, magnesium rejection approximated 45%, and calcium rejection was at 40%. In subsequent water-splitting electrodialysis, both the sodium lactate conversion to lactic acid and sodium hydroxide recovery, were about 95%, with a power requirement of $0.9{\sim}1.0\; kWh$ per kg of lactate.
Keywords
lactic acid; nanofiltration; water-splitting electrodialysis;
Citations & Related Records

Times Cited By Web Of Science : 8  (Related Records In Web of Science)
Times Cited By SCOPUS : 6
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