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Publication
Natural organic matter and disinfection by-products formation potential in conventional and advanced water treatments
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Advisor(s)
Abstract(s)
The performance of a conventional sequence (pre-ozonation, coagulation/flocculation/sedimentation,
filtration, disinfection) and two advance sequences (pre-ozonation, nanofiltration; pre-ozonation,
coagulation/flocculation/sedimentation, nanofiltration) on the removal of natural organic matter
(NOM) and disinfection by-products (DBPs) formation potential was evaluated. Raw and treated
waters were characterized in terms of molecular weight, which includes the amount of NOM removed
and the qualitative changes in the NOM characteristics (molecular weight and hydrophobicity) since
they could be directly related with the DBPs formation. The results demonstrate that, for the type of
raw water analysed (hydrophilic with low dissolved organic carbon content), both treatment sequences
remove larger molecular weight compounds. However, the sequences with nanofiltration have a higher
percentage of low molecular weight compounds removed, when compared with conventional
sequence, thus the water from nanofiltration sequences will have lower DBPs formation potential.
Description
Keywords
Natural organic matter (NOM) Disinfection by-products HPSEC Molecular weight (MW)
Citation
Rosa, Sónia M.; Sousa, Vânia; Margarida Ribau Teixeira. Natural organic matter and disinfection by-products formation potential in conventional and advanced water treatments. Trabalho apresentado em 5th Dubrovnik Conference on Sustainable Development of Energy, Water and Environment Systems. In Proceedings of the 5th Dubrovnik Conference on Sustainable Development of Energy, Water and Environment Systems, Dubrovnik, 2009.