Highly selective recovery of medium chain carboxylates from co-fermented organic wastes using anion exchange with carbon dioxide expanded methanol desorption

Clara Fernando Foncillas, Carlos Cabrera Rodriguez, Francisco Caparros Salvador, Cristiano Varrone, Adrie Straathof*

*Kontaktforfatter

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Abstrakt

The aim of this work was to recover a mixture of carboxylates ranging from 2 to 7 carbon atoms using a strong anion exchange resin, followed by desorption with CO2-expanded methanol. Medium chain carboxylates hexanoate and heptanoate adsorbed better than acetate, and the corresponding medium chain carboxylic acids desorbed easier than acetic acid. Consequently, hexanoate and heptanoate were concentrated up to 14.6 and 20.7 times, respectively. These findings will enable effective separation and purification of the produced carboxylic acids. Notably, the presence of inorganic ions in the sample, such as chloride, decreased the adsorption affinity compared to a synthetic mixture only of carboxylates.
OriginalsprogEngelsk
Artikelnummer124178
TidsskriftBioresource Technology
Vol/bind319
Udgave nummer124178
ISSN0960-8524
DOI
StatusUdgivet - jan. 2021

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