Grants and Contributions:

Grant or Award spanning more than one fiscal year (2017-2018 to 2018-2019).

Nutrients enter into lakes through point and non-point sources are finally settled in bottom sediments wherex000D
they accumulate and eventually release back into the overlaying water. Sediment phosphorus release is one ofx000D
the main reasons for eutrophication in many shallow lakes around the world. This present study examinesx000D
sediment samples collected from Lake Caron, a eutrophic lake to understand the potential removal ofx000D
phosphorus from the sediment using a resuspension technique coupled with filtration. The average Px000D
concentrations in the Lake Caron sediments ranged between 908 and1310 mg/kg P. Depending on the chemicalx000D
forms of P in the sediments, significant sediment P release was observed at both acidic and alkaline conditionsx000D
and thus could have a significant influence on lake water quality. It is proposed to develop a filtrationx000D
technology with geotextile technology with Texel for the removal of organic matter, algae and nutrients. Thex000D
system will done in the laboratory and will consist of a tank, tubing and aeration for suspension of sediments, ax000D
pump for removal of the suspended material and a filtration apparatus for removal of the water from thex000D
suspended matter. Trials in the laboratory will begin early spring using various samples of phosphorusx000D
containing sediments taken in 2017. Nonwoven geotextiles (Texel) will be used as the filter materials forx000D
suspended matter from resuspension of sediments. Various pore size geotextiles will be evaluated to determinex000D
the optimal for removal of nutrient based resuspended sediment. As the ice melts, fresh surface sedimentx000D
samples will be obtained from Lac Caron. Filtration tests will determine removal of organic matter, SS,x000D
nutrients from the sediments. Development of the filtration module will significantly expand the applicabilityx000D
of the geotextiles for sediment treatment to reduce occurrence of blooms due to high nutrient levels. Variousx000D
geotextiles will be evaluated. The protection and improvement of the water quality by nutrient reduction willx000D
improve the aesthetics of the water, health of the community and allow the water to be used for recreationalx000D
purposes and will ensure the protection of the property values.