• Publications
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Denitrifying bioreactors - an approach for reducing nitrate loads to receiving waters.
Abstract Low-cost and simple technologies are needed to reduce watershed export of excess nitrogen to sensitive aquatic ecosystems. Denitrifying bioreactors are an approach where solid carbonExpand
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Use of Multiple Isotope Tracers to Evaluate Denitrification in Ground Water: Study of Nitrate from a Large‐Flux Septic System Plume
This study explores the use of multiple isotopic tracers to evaluate the processes involved in nitrate attenuation in ground water. δ15N and δ18O are used to provide information about the role ofExpand
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Nitrate removal rates in woodchip media of varying age.
Abstract A variety of low-cost carbonaceous solids have been successfully tested in bioreactors designed for nitrate treatment. In many agricultural and wastewater settings, however, such reactorsExpand
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Review of Phosphate Mobility and Persistence in 10 Septic System Plumes
Phosphate distribution was reviewed in 10 mature, highly monitored septic system ground water plumes in central Canada. It was shown that six plumes (primarily those on calcareous sands) of enrichedExpand
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Removal of agricultural nitrate from tile-drainage effluent water using in-line bioreactors
Abstract Two 200-L fixed-bed bioreactors, containing porous-medium material of coarse sand and organic carbon (tree bark, wood chips and leaf compost), were used to treat NO 3 contamination fromExpand
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DENITRIFICATION OF AGRICULTURAL DRAINAGE USING WOOD-BASED REACTORS
Two denitrification reactor designs, utilizing alternate layers of fine and coarse wood particles, were monitored for their ability to achieve passive, maintenance-free nitrate removal inExpand
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Long‐Term Performance of In Situ Reactive Barriers for Nitrate Remediation
Nitrate is now recognized as a widespread ground water contaminant, which has led to increased efforts to control and mitigate its impacts. This study reports on the long-term performance of fourExpand
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Nitrate removal and greenhouse gas production in a stream-bed denitrifying bioreactor.
Abstract Denitrifying bioreactors are currently being tested as an option for treating nitrate (NO 3 − ) contamination in groundwater and surface waters. However, a possible side effect of thisExpand
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In Situ Denitrification of Septic‐System Nitrate Using Reactive Porous Media Barriers: Field Trials
A new alternative septic-system design is presented utilizing reactive porous media barriers for passive in situ attenuation of NO3−. The reactive material consists of solid organic carbon (sawdust)Expand
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Ground‐Water Contamination from Two Small Septic Systems on Sand Aquifers
Distinct plumes of septic system-impacted ground water at two single-family homes located on shallow unconfined sand aquifers in Ontario showed elevated levels of Cl−, NO3−, Na+, Ca2+, K+,Expand
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