Authors: Karpisek, Vanja, Cicek, Nazim, Yuan, Qiuyan
Identifier: CSBE17010
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Published in: CSBE-SCGAB Technical Conferences » AGM Winnipeg 2017 (with CIGR VI Technical Symposium)

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Description: At least 60% of First Nation communities in Manitoba, including the Lake Manitoba First Nation, are located in wetland areas. Wetlands can be used as an effluent-polishing step in removing phosphorus from wastewater. 47% of First Nations communities in Manitoba served by facultative lagoons failed to achieve the total phosphorus (TP) concentration of 1 mg/L in proposed regulations for effluent discharge into the environment. The Lake Manitoba First Nation community facultative lagoon system treats domestic wastewater and seasonally discharges effluent into a wetland that connects to Lake Manitoba. This research was performed to estimate phosphorus removal efficiency through the natural wetland during the vegetation growing season. The secondary treated wastewater was discharged at a mean flow rate of 2,823 m3/day, resulting in a hydraulic loading rate of 22 cm/d with TP loading of 5 kg/day to an adjacent natural wetland. The average total phosphorus concentration reduction utilizing the observed treatment area of 1.3 ha was more than 70%, achieving the desired TP concentration below 1 mg/L. Data analysis showed that significant increase occurred in TP concentrations only in the Meleb series soil, in 20-40 cm depth interval in comparison to 0-20 cm and 40-60 cm depth intervals at the end of vegetation growing season. Hence, the main accumulation of TP occurred in the 20-40 cm soil depth. These short-term study results indicate the potential of natural wetland treatment applications under cold continental climate conditions, as an effluent polishing step to satisfy regulatory requirements for phosphorus reduction in smaller First Nations communities.

Keywords: Phosphorus removal, lagoon wastewater, natural wetlands, First Nations communities
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Date: 2017-08-07
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Conference name: CSBE/SCGAB 2017 Annual Conference, Canad Inns Polo Park, Winnipeg, Manitoba, 6-10 August 2017.
Session name: Poster Session

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Type: Text.Article
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Publication type: Technical conference
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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