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Modelling of transport processes in forward osmosis – Development of a model for industrial waste water treatment (Modellierung von Transportvorgängen bei der Vorwärtsosmose – Entwicklung eines Modells für die Behandlung von industriellen Abwässern)
Art der Abschlussarbeit
Master
Autoren
- Marx, Christian
Betreuer
- Prof. Dr. André Lerch
- Dipl.-Ing. Anita Haupt
Abstract
The goal of this study is, to model the transport processes of forward osmosis (FO) with industrial waste water from the automotive industry. Data from previous work by Blank (2017) and Haupt et al. (2018a) are used. With a focus on describing the permeate flow by considering the reverse solute flux through a Toray forward osmosis membrane provided by Toray Chemical Korea Inc. Three model equations from McCutcheon et al. (2006), Tiraferri et al. (2013), and Bui et al. (2015), which take internal and external con-centration polarization into account, were calculated and compared to the measurement results and evaluated accordingly. The model was implemented in Microsoft Excel. For the industrial effluents, the diffusion coefficients were calibrated and the influence of the membrane parameters (pure water/solution permeability A, solute permeability B and structural parameter S) investigated. The performance tests, which ran with 1 M sodium chloride (NaCl) solutions as draw solution (DS), can be well illustrated regarding permeate and reverse solute flux with the model equations of McCutcheon et al. (2006); and Ti-raferri et al. (2013). The main tests could partly be reproduced, there are obstacles to calibrate a mutual diffusion coefficient regarding the reverse solute and permeate flux for some of the industrial effluents. This discrepancy is probably caused by a variability in the membrane parameters A and B, very high reverse solute fluxes, and as well as fouling. However, best results can be attained by the model equations of Tiraferri et al. (2013) and Bui et al. (2015).
Schlagwörter
Forward osmosis, linear calibration, modelling, industrial effluents, permeate flow, reverse solute flux, membrane parameters, diffusion coefficient
Berichtsjahr
2018