Integration of monopolar and bipolar electrodialysis processes for tartaric acid recovery from residues of the winery industry
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PublisherAmerican Chemical Society (ACS)
Rights accessRestricted access - publisher's policy (embargoed until 2021-08-07)
One of the challenges of the circular economy is to implement the recovery of resources from the generated waste in each industrial sector. This valorization must be one of the main objectives at the industrial level to be economically and ¿nancially sustainable and, at the same time, reduce the environmental impact. This work focuses on this perspective through the valorization of distilled vinasses from the winery industry by means of tartaric acid recovery. A train of membrane processes was experimentally tested for the distilled vinasses treatment: electrodialysis (ED) followed by electrodialysis with bipolar membranes (EDBM). The ED process was evaluated by varying the membrane con¿guration (sequence in the cell unit), type of membrane (di¿erent membrane properties), and type of solution (synthetic and distilled vinasses from the winery industry). Distilled vinasses, which mainly contained potassium hydrogen tartrate (KHT), were treated in a lab-scale set-up with standard and organic selective anionic-exchange membranes (AEM), as well as cationic-exchange membranes (CEM) for ED and also with bipolar membranes (BPM) for EDBM. The results indicated that it was possible to concentrate the KHT contained in the distilled vinasses with a factor of 2 by ED, using standard membranes from Fuji¿lm with the CEM-AEM-CEM con¿guration, and subsequently to produce 9.9 g/L of tartaric acid (H2 T) and 5.6 g/L of potassium hydroxide (KOH) by EDBM (following the (anode)-CEM-BPM-AEM-CEM-(cathode) con¿guration and Fuji¿lm standard and PCCell BP membranes) with a purity of 69.7 ± 1.3 and 77.3 ± 0.3%, respectively. In conclusion, the integration methodology proposed (ED and EDBM) demonstrated to be promising for the recovery of tartaric acid from distilled vinasses following the circular economy approach.
CitationVecino, X. [et al.]. Integration of monopolar and bipolar electrodialysis processes for tartaric acid recovery from residues of the winery industry. "ACS sustainable chemistry & engineering", 7 Agost 2020, vol. 8, núm. 35, p. 13387:1-13399:13.
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