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Dynamic modelling of aqueous two-phase systems to quantify the impact of bioprocess design, operation and variability

Patel, N; Bracewell, DG; Sorensen, E; (2018) Dynamic modelling of aqueous two-phase systems to quantify the impact of bioprocess design, operation and variability. Food and Bioproducts Processing , 107 pp. 10-24. 10.1016/j.fbp.2017.10.005. Green open access

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Abstract

Aqueous two-phase extraction (ATPE) is a promising downstream separation technology as an alternative, or addition, to chromatography in the production of biological products. Increasing demand for therapeutic proteins have triggered manufacturers to consider continuous upstream technologies to achieve greater process efficiencies; however, such technologies have an inherent variability, resulting in output streams of varying compositions and properties. It is therefore important to understand how this variability impacts on the downstream separation processes. Exploring all potential sources of variability is challenging due to resource and time constraints, however, the use of targeted mathematical modelling can significantly reduce the need for expensive and time consuming experimentation. In this work, we present a dynamic equilibrium stage process model, and a methodology for prediction of key process parameters from limited experiments, capable of describing ATPE separations under both multi-cycle batch and continuous counter-current modes of operation. The capabilities of the proposed methodology are demonstrated using a case study separation of the enzyme α-amylase from impurities in a PEG 4000–phosphate aqueous two phase system (ATPS) containing NaCl. The model can be used to predict the separation performance of the process, as well as for the investigation of suitable design and operating conditions.

Type: Article
Title: Dynamic modelling of aqueous two-phase systems to quantify the impact of bioprocess design, operation and variability
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.fbp.2017.10.005
Publisher version: http://doi.org/10.1016/j.fbp.2017.10.005
Language: English
Additional information: © 2017 The Author(s). Published by Elsevier B.V. on behalf of Institution of Chemical Engineers. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Keywords: Aqueous two-phase extraction; ATPS; Equilibrium stage modelling; Multi-cycle batch; Continuous; Parameter estimation
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Biochemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10037433
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