Journal Pre-proofs Production and extraction of medium chain carboxylic acids at a semi-pilot scale José María Carvajal-Arroyo, Stephen J. Andersen, Ramón Ganigué, René A. Rozendal, Largus T. Angenent, Korneel Rabaey PII: S1385-8947(20)34005-5 DOI: https://doi.org/10.1016/j.cej.2020.127886 Reference: CEJ 127886 To appear in: Chemical Engineering Journal Received Date: 19 August 2020 Revised Date: 23 November 2020 Accepted Date: 24 November 2020 Please cite this article as: J. María Carvajal-Arroyo, S.J. Andersen, R. Ganigué, R.A. Rozendal, L.T. Angenent, K. Rabaey, Production and extraction of medium chain carboxylic acids at a semi-pilot scale, Chemical Engineering Journal (2020), doi: https://doi.org/10.1016/j.cej.2020.127886 This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2020 Published by Elsevier B.V.