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Magnetic ion exchange drinking water treatment in a large–scale facility
Author(s) -
Warton Ben,
Heitz Anna,
Zappia Luke R.,
Franzmann Peter D.,
Masters David,
Joll Cynthia A.,
Alessandrino Michael,
Allpike Bradley,
O'leary Bernie,
Kagi Robert I.
Publication year - 2007
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.2007.tb07849.x
Subject(s) - alum , water treatment , chemistry , coagulation , trihalomethane , dissolved organic carbon , activated carbon , portable water purification , water quality , ion exchange , groundwater , environmental chemistry , pulp and paper industry , adsorption , environmental engineering , environmental science , ion , organic chemistry , psychology , ecology , geotechnical engineering , psychiatry , engineering , biology
Although the magnetic ion exchange(MIEX®) process for treating drinking water has been studied at both laboratory and pilot scale, it had not been demonstrated in a large‐capacity plant until recently. This article describes the world's first large‐scale application of the MIEX process at the Wanneroo Groundwater Treatment Plant—which has a capacity of 225 ML/d—in Perth, Western Australia. At Wanneroo, the MIEX drinking water treatment process is followed by conventional alum coagulation (MIEX‐C), and this combined process operates in parallel with an enhanced coagulation (EC) treatment process with alum. On two occasions (summer and winter) with different influent water quality, water samples were collected from various points throughout the treatment plant and subjected to a range of analyses. The purpose of this study was to investigate the changes in the amount and type of organic carbon at various stages in the MIEX and coagulation treatment processes. Biologically available organic carbon was of particular interest. Overall, the MIEX‐C process produced higher‐quality water than the EC process. The MIEX pretreatment step appeared to increase the efficiency of the EC process for reducing dissolved organic carbon concentration and chlorine demand.