Hybrid Treatment Process of using MIEX and High Performance Composite Coagulant for DOM and Bromide Removal
Publication: Journal of Environmental Engineering
Volume 139, Issue 1
Abstract
Dissolved organic matter (DOM) and bromide, two primary precursors of disinfection by-products, cannot be effectively removed by conventional coagulation processes. Alternative methods are required to ensure the safety of drinking water. The effectiveness of using magnetic ion exchange resin (MIEX) and high-performance coagulant (HPAC) in a hybrid process for the removal of turbidity, DOM, and bromide in raw water supplies was investigated. Results showed that a wide range of DOM, with different molecular weights (MWs) containing soluble microbial byproduct-like organic matters, aromatic protein, and fulvic/humic acid, was removed by MIEX in the two studied water sources. In addition, up to 91% of bromide was removed in bromide spiked raw waters. In comparison, HPAC coagulation did not effectively eliminate low MW or soluble microbial byproduct-like organic matters in raw water. The combined MIEX and HPAC process more significantly improved the performance of turbidity, DOM, and bromide removal than coagulation alone. With MIEX pretreatment, the requisite HPAC dosage was reduced by at least 67%.
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Acknowledgments
This work was supported by the NSFC for Excellent Youth 51025830 of China and the National Natural Science Foundation of China (No. 50921064). The authors thank Orica Watercare for supplying the MIEX resins and appreciate Morran Jim for his help during preparation of the paper.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 139 • Issue 1 • January 2013
Pages: 79 - 85
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Dec 10, 2011
Accepted: Jul 13, 2012
Published online: Aug 4, 2012
Published in print: Jan 1, 2013
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