Abstract
Ferulic acid (FA) and p-coumaric acid (pCA) are high-value products that can be obtained by alkaline hydrolysis of lignocellulose. Present work explores the potential of surfactant-based cloud-point extraction (CPE) for FA and pCA extraction from corn cob hydrolysate. More than 90 % (w/w) extraction of both FA and pCA was achieved from model system with L92. The partition coefficient of FA and pCA in L92 aqueous phase system was 35 and 55, respectively. A significant enrichment (8–10-fold) of both FA and pCA was achieved in surfactant-rich phase. Furthermore, the downstream process volume was reduced by 10 to 13 times. Optimized conditions (5 % v/v L92 and pH 3.0) resulted into 85 and 89 % extraction of FA and p-CA, respectively, from alkaline corn cob hydrolysate. Biocompatibility tests were carried out for L92 for ethanol fermentation and found to be biocompatible. Thus, the new surfactant-based CPE system not only concentrated FA and pCA but also reduced the process volume significantly. Further, aqueous phase containing sugars can be used for ethanol fermentation.
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Authors are grateful to BASF, Mumbai, India, for kindly supplying the free samples of surfactant.
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Dhamole, P.B., Demanna, D. & Desai, S.A. Extraction of p-Coumaric Acid and Ferulic Acid Using Surfactant-Based Aqueous Two-Phase System. Appl Biochem Biotechnol 174, 564–573 (2014). https://doi.org/10.1007/s12010-014-1107-8
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DOI: https://doi.org/10.1007/s12010-014-1107-8