Heuvel, van den, J.C.; Vredenbregt, L.H.J.; Portegies Zwart, I.; Ottengraf, S.P.P.
Published in:Antonie van Leeuwenhoek
DOI:10.1007/BF00872200Published: 01/01/1995
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Citation for published version (APA):Heuvel, van den, J. C., Vredenbregt, L. H. J., Portegies Zwart, I., & Ottengraf, S. P. P. (1995). Acceleration of mass transfer in methane-producing loop reactors. Antonie van Leeuwenhoek, 67(1), 125-130. DOI: 10.1007/BF00872200General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ?
Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Key words: acceleration, anaerobic digestion, gaslift reactors, loop reactors, mass transfer, pressure oscillations
AbstractGas bubbles entrapped in methanogenic granules subjected to hydrostatic pressure oscillations during recirculation in loop reactors will induce intraparticle liquid flows, and thereby enhance mass transfer in excess of diffusion. This 'breathing particle' concept was clearly demonstrated in a well defined inorganic model system. The experimental results could be described satisfactory with a structured mathematical model, while a 30% improvement is predicted for methanogenic loop reactors as compared to constant pressure systems. It is concluded that acceleration of mass transfer in gas-producing systems offers challenging perspectives for both heterogeneous catalysis and biological fermentations.
