Kinetic modelling of the solid-liquid extraction process of polyphenolic compounds from apple pomace: influence of solvent composition and temperature

P. Hobbi, O.V. Okoro, C. Delporte, H. Alimoradi, D. Podstawczyk, L. Nie, K.V. Bernaerts, A. Shavandi*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Web of Science)


This study aims to assess kinetic modelling of the solid-liquid extraction process of total polyphenolic compounds (TPC) from apple pomace (AP). In this regard, we investigated the effects of temperature and solvent (i.e. water, ethanol, and acetone) on TPC extraction over various periods. The highest TPC yield of 11.1 +/- 0.49 mg gallic acid equivalent (GAE)/g db (dry basis) was achieved with a mixture of 65% acetone-35% water (v/v) at 60 degrees C. The kinetics of the solvent-based TPC extraction processes were assessed via first-order and second-order kinetic models, with an associated investigation of the kinetic parameters and rate constants, saturation concentrations, and activation energies. The second-order kinetic model was sufficient to describe the extraction mechanism of TPC from AP. This study provides an understanding of the mass transfer mechanism involved in the polyphenolic compound extraction process, thus facilitating future large-scale design, optimization, and process control to valorize pomace waste.
Original languageEnglish
Article number114
Number of pages14
JournalBioresources and Bioprocessing
Issue number1
Publication statusPublished - 24 Nov 2021


  • Apple pomace
  • Polyphenolic compounds
  • First-order kinetic model
  • Second-order kinetic model
  • Waste valorization
  • Value extraction

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