Role of gelling soluble and colloidal microbial products in membrane fouling.
作者： Xiao-mao Wang , T. David Waite
DOI: 10.1021/ES9013129
关键词: Titration 、 Fouling 、 Bioreactor 、 Membrane fouling 、 Colloid 、 Organic chemistry 、 Membrane 、 Chemistry 、 Amine gas treating 、 Chemical engineering 、 Polysaccharide
摘要: The mechanism underlying gel layer formation on membrane surfaces from soluble and colloidal microbial products (SCMPs) produced under unfavorable operational conditions for bioreactors (MBRs) has been investigated using supernatants a bench-scale MBR. SCMPs can be grossly classified into gelling nongelling with the fraction associated mostly polysaccharide content. significant role played by multivalent metals in through metal−ligand complexation confirmed. Functional groups of were determined pH titration ζ potential measurement as amine/phenolic sites (pKa 9.3 8.0), carboxylic 6.6, 4.9, ca. 4.0), phosphoric 2.5). more directly involved cation complexation; however, propensity SCMP dispersion was minimally affected change circum-neutral range, suggesting that strong princi...
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