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dc.contributor.authorGausmann, Marcel
dc.contributor.authorBertram, Franziska
dc.contributor.authorSchuur, Boelo
dc.contributor.authorJupke, Andreas
dc.contributor.authorGössi, Angelo
dc.contributor.authorRiedl, Wolfgang
dc.date.accessioned2022-10-12T09:54:31Z
dc.date.available2022-10-12T09:54:31Z
dc.date.issued2022
dc.identifier.issn13835866
dc.identifier.doi10.1016/j.seppur.2022.120702
dc.identifier.urihttps://irf.fhnw.ch/handle/11654/33937
dc.description.abstractReactive extraction of carboxylic acids such as lactic acid with tertiary amines is a state-of-the-art process but suffers strongly from reduced extraction efficiency in buffered environments like fermentation broths. In order to increase the efficiency of in-situ product removal, we here propose the combination of a membrane-assisted reactive extraction with an electrochemical pH shift. Prior to extraction in the membrane module, the fermentation broth containing the lactic acid at neutral pH is treated by anodic electrolysis to reduce the pH and thereby improve the extraction yield. Additionally, the cathodic reaction is used to increase the pH of the aqueous stream used for back-extraction of the loaded organic phase. Model solutions were used to develop a mathematical model, capable of calculating the required membrane area for in-situ extractions, considering the effect of the aqueous pH on the extraction performance. Additionally, using electrochemical pH shift, we were able to concentrate lactic acid from 1 wt% in the dilute broth to 7 wt% in the back extract.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofSeparation and Purification Technologyen_US
dc.accessRightsAnonymous*
dc.subjectLactic aciden_US
dc.subjectElectrochemical separationen_US
dc.subjectpH shift extractionen_US
dc.subjectMembrane contactoren_US
dc.subjectReactive extractionen_US
dc.subject.ddc500 - Naturwissenschaftenen_US
dc.titleElectrochemical membrane-assisted pH-swing extraction and back-extraction of lactic aciden_US
dc.type01A - Beitrag in wissenschaftlicher Zeitschrift*
dc.volume289en_US
fhnw.publicationStatePublisheden_US
fhnw.ReviewTypeAnonymous ex ante peer review of a complete publicationen_US
fhnw.InventedHereYesen_US
fhnw.IsStudentsWorknoen_US
fhnw.openAccessCategoryClosed


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