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Fouling Mechanisms of Polysaccharides: Filtration Behaviour and Characterization

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Title: Fouling Mechanisms of Polysaccharides: Filtration Behaviour and Characterization
Author: Jamal, Sondus
Department: School of Engineering
Program: Engineering
Advisor: Chang, sheng
Abstract: Membrane fouling caused by soluble microbial products (SMP), which mainly consists of polysaccharides and proteins, remains one of the main factors limiting the efficiency and applications of membrane bioreactors (MBRs). Surrogates, such as sodium alginate (SA) and bovine albumin serum (BSA), are commonly used to investigate fouling mechanisms of SMP. This research aims to investigate the filtration behaviour and fouling mechanisms of polysaccharides using alginate as a surrogate, and to develop advanced tetra-detector size exclusion chromatography (SEC) methods for the characterisation of the main colloidal and hydrodynamic properties of SMPs. This project improved understanding of the effect of calcium, flux, and BSA addition on the filtration resistance of the polysaccharide gel layer, the irreversible membrane resistance, and the membrane rejection behaviour. In addition, the study also developed tetra-detector methods for the characterisation of model polysaccharides, and assessed the applications of the tetra-detector SEC for SMP characterisation. These results are of significance for the understanding of membrane fouling mechanisms and the development of improved methods for the membrane fouling assessment and SMP characterisation in MBRs.
Date: 2014-09
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