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http://dx.doi.org/10.7841/ksbbj.2011.26.1.013

Optimization of Precipitation Process for the Recovery of Lactic Acid  

Choi, Kook-Hwa (Department of Chemical Engineering, Kongju National University)
Chang, Yong-Keun (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology)
Kim, Jin-Hyun (Department of Chemical Engineering, Kongju National University)
Publication Information
KSBB Journal / v.26, no.1, 2011 , pp. 13-18 More about this Journal
Abstract
In this study, precipitation process was developed for the recovery of the lactic acid from calcium lactate fermentation broth. Calcium lactate yield was improved by decreasing the solubility of calcium lactate through the addition of ethanol (25%, v/v) as a co-precipitant. The optimal lime type, lime concentration, stirrer speed, precipitation time, temperature, and solvent amount for $Ca(LA)_2$ precipitation were CaO, 0.0175 g/mL, 220 rpm, 24 h, $5^{\circ}C$, ethanol 25% (v/v), respectively. Lactic acid was easily and efficiently recovered from precipitated $Ca(LA)_2$ by adding sulfuric acid ($Ca(LA)_2/H_2SO_4$ molar ratio=1:1). In the model solution of organic acids and fermentation broth, the overall yields of recovered lactic acid were 62% and 55%, respectively, under the aforementioned optimal conditions.
Keywords
lactic acid; recovery; precipitation process; process parameters; optimization;
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Times Cited By KSCI : 2  (Citation Analysis)
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