Grants and Contributions:

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

In this research project, we will survey clogging problems currently experienced in wastewater sub-surfacex000D
filtration systems at a variety of project sites managed by Dillon Consulting. Dillon Consulting Ltd. approachedx000D
us to understand the causes and provide potential remedies to such clogging issues. Precipitants will bex000D
collected and analyzed for iron, calcium, sulfur, carbonate, magnesium, phosphorus, nitrogen, organic carbon,x000D
protein, potassium, and sodium to determine the composition of the clogging agents. Analysis of physical andx000D
chemical conditions occurring upstream of the precipitation problems will be conducted to determine combinedx000D
effects of ion concentration, water flow rate, temperature and pH on precipitation. Process design alterationsx000D
and flow configurations to mitigate precipitate formation and accumulation will be determined. Of particularx000D
interest is precipitation occurrence in conditions of low ion concentration and what changes can be made tox000D
avoid these problems. Test columns of filter media of different porosity and character (e.g. sand and inertx000D
recycled glass as control) will be evaluated to determine optimum percolation rates to avoid clogging. Throughx000D
another research project, a site is available to us in the Village of Dunnottar, MB for pilot scale testing ofx000D
precipitate forming conditions as well as remediation options. Dillon Consulting will benefit from this study, asx000D
they will better understand operational challenges associated with inorganic precipitation and consider designx000D
changes to existing and future sites.