Nanofiltration of glucose and sodium lactate solutions - Variations of retention between single- and mixed-solute solutions

被引:131
作者
Bouchoux, A
Roux-de Balmann, H
Lutin, F
机构
[1] Univ Toulouse 3, CNRS, UMR 5503, Lab Genie Chim, F-31062 Toulouse, France
[2] Eurodia Ind, F-91320 Wissous, France
关键词
nanofiltration; lactic acid; intrinsic retention; salt and sugar retention; hydration;
D O I
10.1016/j.memsci.2005.03.002
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The aim of this work was to investigate NF as a purification step, i.e. sugar removal, in the production process of lactic acid from sodium lactate fermentation broth. Experiments were carried out with the Desal 5 DK membrane and solutions of increasing complexity, i.e. single-solute solutions of sodium lactate and glucose and mixed-solute solutions containing both solutes. Concentrations close to those of a fermentation broth were chosen. Experimental results were used to get the variations of the intrinsic retention versus the permeation flux in order to achieve comparisons without the interference of concentration polarization. Quite distinct retentions were obtained for glucose and sodium lactate in single-solute solutions so that the purification was expected to be feasible. However, it is pointed out that glucose retention is significantly lower in mixed-solute solutions, i.e. when sodium lactate is present. This decrease is such that the retentions of both solutes become comparable so that any purification is unachievable. Experiments were also performed with a salt of a different nature (mineral salt, NaCl). Again, it was found that the presence of NaCl tends to decrease glucose retention. Moreover, the phenomenon is shown to be related to the salt concentration in both cases, i.e. with sodium lactate and NaCl. Some possible explanations of this effect are provided in this paper. Further investigations are still in progress to improve the knowledge of the mechanisms involved. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:123 / 132
页数:10
相关论文
共 34 条
[1]  
Bailly A, 2001, J MEMBRANE SCI, V191, P129
[2]   Production of organic acids by bipolar electrodialysis: realizations and perspectives [J].
Bailly, M .
DESALINATION, 2002, 144 (1-3) :157-162
[3]   Modelling the performance of membrane nanofiltration - critical assessment and model development [J].
Bowen, WR ;
Welfoot, JS .
CHEMICAL ENGINEERING SCIENCE, 2002, 57 (07) :1121-1137
[4]   Linearized transport model for nanofiltration: Development and assessment [J].
Bowen, WR ;
Welfoot, JS ;
Williams, PM .
AICHE JOURNAL, 2002, 48 (04) :760-773
[6]   A preliminary comparison between nanofiltration and reverse osmosis membranes for grape juice treatment [J].
Ferrarini, R ;
Versari, A ;
Galassi, S .
JOURNAL OF FOOD ENGINEERING, 2001, 50 (02) :113-116
[7]   Separation of concentrated organic/inorganic salt mixtures by nanofiltration [J].
Freger, V ;
Arnot, TC ;
Howell, JA .
JOURNAL OF MEMBRANE SCIENCE, 2000, 178 (1-2) :185-193
[8]   Modelling the rejection of nanofiltration membranes using zeta potential measurements [J].
Hagmeyer, G ;
Gimbel, R .
SEPARATION AND PURIFICATION TECHNOLOGY, 1999, 15 (01) :19-30
[9]   Modelling the salt rejection of nanofiltration membranes for ternary ion mixtures and for single salts at different pH values [J].
Hagmeyer, G ;
Gimbel, R .
DESALINATION, 1998, 117 (1-3) :247-256
[10]   NANOFILTRATION OF MODEL ACETATE SOLUTIONS [J].
HAN, IS ;
CHERYAN, M .
JOURNAL OF MEMBRANE SCIENCE, 1995, 107 (1-2) :107-113