Generalis, S.

Markoš, J.

Ruzicka, M. C.

Teixeira, J. A.

Thomas, N.

Zahradnik, Jindrich

Universidade do Minho: RepositoriUM

Modelling design of multiphase bubble-bed reactors for advancedfood-industry technologiesZahradník, J1., Thomas, N.5, Růžička, M.1, Teixeira, J., A.3, Markoš, J.2,Generalis, S.41Czech Academy Sciences - ICPF, Prague, CZ, 2Slovak Univeristy of Technology, Bratislava, SK,3University of Minho, Braga, P, 4Aston University, Birmingham, UK, 5FRED Ltd – Aston Science Park,Birmingham, UKAn EC Copernicus project under this title commenced November 1998 having beencatalysed through the good offices of Dr Jindrich Zahradnik, sadly since deceased(INCO COPERNICUS Project IC15-CT98-0904). This paper will overview mainelements of collaborative contexts and contributions coming from the four partners. Apurpose of website hosted by Aston University as coordinating institution,www.copernicus.aston.ac.uk is to communicate not only major individual componentsand collaborations facilitated by study exchanges but also shared vision ofanticipated exploitation by sector industries. Drawing on this material ourpresentation - poster will outline original interest vectors of the partners in terms ofestablished expertise and their unification under EC umbrella funding.Prior liaisons  provided our platform on understanding the roles of gas entryconditions and couplings for near field behaviour and modal interpretations and fornew representations of synergistic bubble interactions via nonlinear paradigms . Italso afforded access to reconciliation of contentious issues in functionally applicablescalings for regime transition in real bubble columns and consolidation of earlierspeculation that instability inception in bubble columns might be analogous to thatmanifested in thermal convective transition of uniphase fluids heated from below.These advances are providing useful new theoretical foundations not only for basicinterpretations of experimental data and its application by scaling correlation tobioreactor performance evaluation but also for efficacy validation of “CFD” codes onwhich some sector hopes have been pinned as avenues to improved and cheaperprotocols in exploring configurational and operational options.Our project incorporates elements of all these aspects, including physicalperformance evaluations / correlations for oxygen transfer in airlift loops to pilot scaleplus pulsed delivery options overcoming inhibition in viscous broths ,also mass-loading impairment of transport dynamics in floc-stabilised cultures, respectively asprecursors for implementation in real fermentations of citric acid and beer. CFDaspects are included via a familiarisation / implementation training exercise usingFLUENT which was chosen as a globally established product with sustained supportservices. This aspect is anticipated to be of end-user interest principally as aprospective teaching / training tool for improved insight by bioprocess engineers,many of whom from biochemical backgrounds lack firsthand familiarity with intricatecomplexities of multiphase turbulence in simple fluids, never mind the challengingconstitutions of real broths.Tempting as it may be merely to advertise ones’ own wares in our era ofdissemination justification, we will ensure all aspects are adequately covered bycontextual commentary following traditional best practice in scientific reporting.Acknowledgments: This work was supported by the project Copernicus IC15 -CT98-.28th Conference SSCHE, Proceedings on CD ROM, Tatranské Matliare (SK), 21 – 25 May, 2001

Modelling design of multiphase bubble-bed reactors for advanced food-industry technologies

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Modelling design of multiphase bubble-bed reactors for advanced food-industry technologies

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Universidade do Minho: RepositoriUM