Lactic acid recovery from a model of Thermotoga neapolitana fermentation broth using ion exchange resins in batch and fixed-bed reactors |
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| Authors: | Vincenzo Luongo Angelo Palma Eldon R Rene Angelo Fontana Francesco Pirozzi Giovanni Esposito |
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| Affiliation: | 1. Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Naples, Italy;2. Department of Mathematics and Applications Renato Caccioppoli, University of Naples Federico II, Naples, Italy;3. UNESCO-IHE Institute for Water Education, Delft, The Netherlands;4. UNESCO-IHE Institute for Water Education, Delft, The Netherlands;5. National Research Council of Italy, Institute of Biomolecular Chemistry, Pozzuoli, Italy;6. Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino, Italy |
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| Abstract: | This study focused on the integration of lactic acid adsorption and desorption onto commercially available resins in batch reactors with consequent scale-up in fixed-bed reactors. Amberlite® IRA-900, IRA-400, IRA-96 and IRA-67 were used as adsorbents for lactic acid recovery from solutions that mimic the fermentation broth of Thermotoga neapolitana. The best resins were further tested in adsorption–desorption batch experiments, over 13 cycles, with IRA-67 showing an average removal efficiency of 97%. IRA-67 was tested in fixed-bed reactor experiments and an average desorption efficiency of 68% was achieved using three bed volumes of 0.5 M NaOH as the desorbing agent. |
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| Keywords: | Lactic acid anionic exchange resins adsorption desorption fixed bed reactor |
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