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Permanent link (DOI): https://doi.org/10.7939/R35D6T

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Stormwater Pond Sediment De-watering by Anionic PAM at Low Temperature Open Access

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Other title
Subject/Keyword
stormwater pond
polymer
de-watering
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Zhang, Zhenyuan
Supervisor and department
Liu, Yang (Civil and Environmental Engineering)
Davies, Evan (Civil and Environmental Engineering)
Examining committee member and department
Leonidas Perez-Estrada (Civil and Environmental Engineering)
Davies, Evan (Civil and Environmental Engineering)
Liu, Yang (Civil and Environmental Engineering)
Department
Department of Civil and Environmental Engineering
Specialization
Environmental Science
Date accepted
2014-09-19T14:12:31Z
Graduation date
2014-11
Degree
Master of Science
Degree level
Master's
Abstract
Storm water ponds have been widely constructed over the past four decades as part of municipal storm water drainage systems. These ponds are designed to collect neighborhood storm water run-off to reduce flooding, but can also improve the quality of water discharged to surface water bodies by allowing sediments to drop out of the water column. This sediment gradually accumulates at the bottom of the storm water pond, necessitating occasional dredging. Polyacrylamides (PAM) offer an option to decrease the water content, and therefore weight and volume, of this pond sediment before dredging. This study aimed to improve understanding of the performance of PAM-based sediment dewatering in different conditions, with a focus on the low northern temperatures of Canada. First, the characteristics of storm water pond sediments were reported. Then, dose and temperature effects of PAM were tested. The results indicated that the best dose of PAM (Clearflow Enviro Systems Inc. Soil Lynx 398) to be applied was 0.3g/L when treating pond sediment. The water content of sediment cake increased with increasing PAM concentration when PAM concentration was at 0.3-5 g/L. Meanwhile, in terms of temperature effects for a range of 4-30°C, the water content did not show any significant change (p > 0.05). Other parameters such as turbidity, initial settling rate, sediment volume were also measured in this study. The potential mechanisms involved were discussed as well.
Language
English
DOI
doi:10.7939/R35D6T
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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