The use of membrane based reactive extraction for the recovery of carboxylic acids from thin stillage

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논문

The use of membrane based reactive extraction for the recovery of carboxylic acids from thin stillage

학술지

Separation and purification technology

저자명

De Sitter, Kristien; Garcia-Gonzalez, Linsey; Matassa, Claudia; Bertin, Lorenzo; De Wever, Heleen

초록

Abstract Within the carboxylate platform, carboxylic acids are seen as important building-blocks for the chemical industry, but their recovery is challenging. Membrane based reactive extraction (MBRE) was evaluated for the recovery of these acids from a fermentor in which a mixed culture is converting biorefinery wastewater to carboxylates. Both off-line and in-line experiments were performed. The off-line experiments were promising and extraction efficiencies of 15 (acetic acid) to almost 100% (caproic acid) were reached. The in-line experiments confirmed the selective and near complete extraction of carboxylates with longer chain length. However the overall extraction rates were lower than in off-line tests and the total carboxylate production rate was also decreasing. This was probably caused by limited but repeating contact between organic phase and fermentation broth via the membrane interface. Highlights <UL> <LI> MBRE shows potential for in-situ recovery of carboxylates from fermentation broth. </LI> <LI> Medium-chain carboxylates selectively removed in coupled MBRE – fermentation tests. </LI> <LI> Acid production rate decreased during coupled MBRE – fermentation tests. </LI> </UL>

발행연도

2018

발행기관

Elsevier

ISSN

1383-5866

권

206

페이지

pp.177-185

DOI

10.1016/j.seppur.2018.06.001