Removal of disinfection by-product precursors by coagulation and an innovative suspended ion exchange process

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Removal_of_disinfection_by-product_precursors-2015.pdf (262.97 KB)

Date published

2015-09-07

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Authors

Metcalfe, David
Rockey, Chris
Jefferson, Bruce
Judd, Simon J.
Jarvis, Peter

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Elsevier

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Article

ISSN

0043-1354

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URI

http://dx.doi.org/10.1016/j.watres.2015.09.003
 http://dspace.lib.cranfield.ac.uk/handle/1826/11463

Citation

David Metcalfe, Chris Rockey, Bruce Jefferson, Simon Judd, Peter Jarvis, Removal of disinfection by-product precursors by coagulation and an innovative suspended ion exchange process, Water Research, Volume 87, 15 December 2015, pp20-28

Abstract

This investigation aimed to compare the disinfection by-product formation potentials (DBPFPs) of three UK surface waters (1 upland reservoir and 2 lowland rivers) with differing characteristics treated by (a) a full scale conventional process and (b) pilot scale processes using a novel suspended ion exchange (SIX) process and inline coagulation (ILCA) followed by ceramic membrane filtration (CMF). Liquid chromatography-organic carbon detection analysis highlighted clear differences between the organic fractions removed by coagulation and suspended ion exchange. Pretreatments which combined SIX and coagulation resulted in significant reductions in dissolved organic carbon (DOC), UV absorbance (UVA), trihalomethane and haloacetic acid formation potential (THMFP, HAAFP), in comparison with the SIX or coagulation process alone. Further experiments showed that in addition to greater overall DOC removal, the processes also reduced the concentration of brominated DBPs and selectively removed organic compounds with high DBPFP. The SIX/ILCA/CMF process resulted in additional removals of DOC, UVA, THMFP, HAAFP and brominated DBPs of 50, 62, 62, 62% and 47% respectively compared with conventional treatment.

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Github

Keywords

Ceramic membrane filtration, Disinfection by-products, Ion exchange, Natural organic matter

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