Modelling the electrodialytic recovery of sodium lactate.
The recovery of sodium lactate from model solutions by ED (electrodialysis) was studied using a sequential experimental procedure so as to assess the main engineering parameters (i.e. ion transport numbers in solution and electro-membranes, effective solute and water transport numbers, effective membrane surface area, surface resistances and limiting current intensity) affecting ED stack design and/or optimization. Of the major factors that determine the performance of this ED process, Omega (the current efficiency) was about 88% in the constant-current region, while epsilon (the specific energy consumption) increased from 0.14 to 0.31 kWh x kg(-1) for a solute recovery yield of 95% and j (current density) increasing from 112 to 337 A x m(-2). The specific-resistance values of the anion- or cation-exchange membranes were found to be five or two times greater respectively than those extracted from literature and measured in aqueous NaCl solutions.
Fidaleo
Marcello
M
Department of Food Science and Technology, University of Tuscia, Via San Camillo de Lellis, 01100 Viterbo, Italy.
Moresi
Mauro
M
D000251:Adenosine Triphosphatases / Q000737:chemistry* / Q000302:isolation & purification*; D002352:Carrier Proteins / Q000737:chemistry* / Q000302:isolation & purification*; D003198:Computer Simulation; D003956:Dialysis / Q000379:methods*; D004563:Electrochemistry / Q000379:methods*; D008565:Membrane Proteins / Q000737:chemistry* / Q000302:isolation & purification*; D025261:Mitochondrial Proton-Translocating ATPases; D008956:Models, Chemical; D019354:Sodium Lactate / Q000737:chemistry* / Q000302:isolation & purification*
D002352:Carrier Proteins; D008565:Membrane Proteins; D000251:Adenosine Triphosphatases; D025261:Mitochondrial Proton-Translocating ATPases; C020439:oligomycin sensitivity-conferring protein; D019354:Sodium Lactate