Throughout the project there have been discussions about the different lengths of time it takes to settle different soil types. In general sand settles the quickest followed by silt, clay, and lastly, muck. To demonstrate this process, jar tests were done with a mineral and muck soil sample. Jar tests are simply soil added to water and left to settle. The depth of the water to the top of the sediment layer was measured as 2 1/8”. The test was evaluated by taking pictures of the two jars at regular intervals (Figure 1). Calculations were done to predict when the various soils would settle out of the water, shown in Figure 2. As expected, the order in which they settled was sand first, then silt, clay, and finally muck. The sand settled so quickly it was impossible to get a picture with it still in suspension. The silt followed soon after and then took a period of time to fill in the spaces between the sand particles. Clay can be seen in suspension in Hour 6 but has cleared in Hour 24. The calculations predicted that the muck would have settled in 22 days. While most of it cleared by the 21st day, the picture taken on the 100th day shows that there are still particles in suspension. Lastly, in both jars there is a layer of organic matter floating on the surface. These particles have made no downward movement through the time period. The jars will continue to be monitored to determine whether the colour clears from the jar containing the muck soil. | |
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December 2016
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Watersheds Lake Simcoe Watershed Nottawasaga Valley Watershed South-Eastern Georgian Bay Watershed Water, Water, Everywhere? The Trouble with Muck: Size Lesson Learned: Bottom- up Aerator to Treat Washwater in Settling Tanks Phosphorus, the Environment, and Farming Nitrogen’s Impact on Air, Land, and Water Water-borne Pathogens and Food Safety Defining Dissolved Oxygen Filter Bags Demonstration Site Organic Matter Breakdown & Biochemical Oxygen Demand Dealing with Cloudy Water Hydrocyclone Demonstration Test What IS Muck? Demystifying Oxidation- Reduction Potential News Release "Technology Investigation: Filter Bags" Drum Filter Demonstration Site Decomposing With(out) Oxygen Flow monitoring Lesson Learned: Drum Filter Optimization Polders & the Holland Marsh Vegetable Washing Process Dry Soil Removal Ultrafiltration & Deionization Demonstration Site News Release "Technology Investigation: Ultrafiltration & Capacitive Deionization" Progressive Passive Filtration Dissolved Air Flotation Clarifying the Solid Removal Process Factsheet Reading Order News Release: "Technology Investigation: Coagulation & Flocculation" Self-Indexing Filter Monitoring Discharge Flows Settling Soil Mass Loading Calculations Lesson Learned: Technology Selection Electrocoagulation Auto-Samplers |