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Wetland Water Discharge Remediation Using On-Site Non-woven Geotextile Filtration
Lake Johanne, a shallow mesotrophic lake located in the Sainte-Anne-des-Lacs municipality in Quebec, is receiving water from a wetland discharge. This wetland water could be possibly contributing to this lake’s ageing. Thus, as an initial investigation, an on-site potential remediation of this wetland water discharge using a non-woven geotextile filtration technique is proposed. The method was based on a tank located near the lakeshore with a floating geotextile filtration system in continuous mode (i.e., 0.5-day retention time). On deployment, wetland water was pumped into the tank using a calibrated peristaltic pump (inlet), filtered by a selected set of non-woven geotextiles with distinct apparent opening sizes, and then returned to the lake (outlet) by gravity. This experiment ran throughout the summer and mid-fall of 2021. Samples from both the inlet and tank were taken every 2 days, and filter layers were changed upon clogging. The objective of this study was to improve the quality of this discharge before entering the lake by filtration. The water quality parameters monitored during the experiment from both inlet and tank samples were total phosphorus, total nitrogen, nitrate, chemical oxygen demand, total suspended solids, particle size, and turbidity. The non-woven geotextile filters removed nutrients, organic matter, and suspended particles at levels of 32%, 17%, and 29% for total phosphorus, COD, and turbidity removals, respectively, when the tank inlet and outlet were compared during the entire experiment. In addition, it was proven that the proposed method is easy to install, deploy, and quickly adapt to water quality changes. Even though the results have pointed out that additional investigation is needed, the treatment improved the quality of a portion of this wetland water. Thus, the feasibility of treatment has been shown for this possible remediation.
Wetland Water Discharge Remediation Using On-Site Non-woven Geotextile Filtration
Lake Johanne, a shallow mesotrophic lake located in the Sainte-Anne-des-Lacs municipality in Quebec, is receiving water from a wetland discharge. This wetland water could be possibly contributing to this lake’s ageing. Thus, as an initial investigation, an on-site potential remediation of this wetland water discharge using a non-woven geotextile filtration technique is proposed. The method was based on a tank located near the lakeshore with a floating geotextile filtration system in continuous mode (i.e., 0.5-day retention time). On deployment, wetland water was pumped into the tank using a calibrated peristaltic pump (inlet), filtered by a selected set of non-woven geotextiles with distinct apparent opening sizes, and then returned to the lake (outlet) by gravity. This experiment ran throughout the summer and mid-fall of 2021. Samples from both the inlet and tank were taken every 2 days, and filter layers were changed upon clogging. The objective of this study was to improve the quality of this discharge before entering the lake by filtration. The water quality parameters monitored during the experiment from both inlet and tank samples were total phosphorus, total nitrogen, nitrate, chemical oxygen demand, total suspended solids, particle size, and turbidity. The non-woven geotextile filters removed nutrients, organic matter, and suspended particles at levels of 32%, 17%, and 29% for total phosphorus, COD, and turbidity removals, respectively, when the tank inlet and outlet were compared during the entire experiment. In addition, it was proven that the proposed method is easy to install, deploy, and quickly adapt to water quality changes. Even though the results have pointed out that additional investigation is needed, the treatment improved the quality of a portion of this wetland water. Thus, the feasibility of treatment has been shown for this possible remediation.
Wetland Water Discharge Remediation Using On-Site Non-woven Geotextile Filtration
Lecture Notes in Civil Engineering
Gupta, Rishi (editor) / Sun, Min (editor) / Brzev, Svetlana (editor) / Alam, M. Shahria (editor) / Ng, Kelvin Tsun Wai (editor) / Li, Jianbing (editor) / El Damatty, Ashraf (editor) / Lim, Clark (editor) / Pereira, Antonio C. (author) / Veetil, Dileep Palakkeel (author)
Canadian Society of Civil Engineering Annual Conference ; 2022 ; Whistler, BC, BC, Canada
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 ; Chapter: 67 ; 1043-1056
2023-08-17
14 pages
Article/Chapter (Book)
Electronic Resource
English
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