Effect of Hydrous Manganese Dioxide on the Treatment of Low-Turbidity Source Water: Plant-Scale Experience
Publication: Journal of Environmental Engineering
Volume 137, Issue 6
Abstract
The effect of potassium permanganate () preoxidation on the treatment of low-turbidity reservoir water was investigated through two years of operational data in a large-scale drinking water treatment plant (DWTP). facilitated the removal of pollutants [e.g., turbidity and chemical oxygen demand ()] by different units such as clarification, sand filtration, and granular activated carbon (GAC) adsorption. Although the addition of increased the color and total Mn concentrations, the results of removal by clarification and filtration are promising. The average run length of anthracite filters decreased from 48 to 40.8 hours after the introduction of and exhibited a negative correlation with dosages (). The hydrous manganese dioxide in situ formed () dominated in aiding coagulation and improving filtration to enhance pollutant removal in the preoxidation process, and these effects were achieved at the expense of more frequent backwashing of anthracite filters.
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Acknowledgments
This work was supported by a key project of the National Natural Sciences Foundation of China (NNSFC50938004) and a key project of National “863” High-tech Research and Development Program of China (UNSPECIFIED2008AA062501).
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Information
Published In
Journal of Environmental Engineering
Volume 137 • Issue 6 • June 2011
Pages: 481 - 486
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Apr 20, 2010
Accepted: Dec 16, 2010
Published online: Dec 18, 2010
Published in print: Jun 1, 2011
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