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Chung, Youngkun,Kim, Hyojeon,Kim, Taek-Seung,Kim, Young Mi,Kang, Seoktae Elsevier Science B.V 2019 Separation and purification technology Vol.219 No.-
<P><B>Abstract</B></P> <P>The fouling propensity of organic matter categorized by their origins has been investigated during the reuse of tertiary wastewater effluent by a ceramic ultrafiltration membrane with molecular weight cut-off (MWCO) around 1 kDa. Selective removal of organic matter was carried out with three carbon-based adsorbents including granular activated carbon (GAC), expanded graphite (EG), and multi-walled carbon nanotubes (MWNTs). Analysis on the residual organic matter after the adsorption revealed that EG and MWNTs mainly adsorbed microbial-oriented organic matters (MOOMs) such as the soluble microbial products (SMP)-like and aromatic protein (AP)-like organic compounds, while GAC showed non-selective organic removals. At the identical organic loading, feed solution treated by EG and MWNTs exhibited significantly lower fouling propensity than that of the GAC-treated sample. Consequently, the selective removal of MOOMs from tertiary effluents can provide an effective strategy to reduce organic fouling on ceramic membranes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Microbial-oriented organic matters (MOOMs) were the major organic foulant in WWTP effluent. </LI> <LI> Pretreatment steps for the selective removal of MOOMs can extend the ceramic membrane fouling. </LI> <LI> Graphene-structured carbon materials can selectively adsorb MOOMs. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>