WAMQI: Evaluation of pathogen removal by denitrification bioreactors and constructed wetlands under Ontario conditions

This study was an extension of the WRAMI project for second season to include early spring and late fall monitoring (cool temperatures) at the edge of field sites, modified hydraulic retention times and/or nutrient characteristics of waste streams to the bioreactors at the greenhouse sites, and the performance of a newly constructed wetland system treating recycled leachate water from a greenhouse, where the most significant water treatment requirements occur over the winter period. Removal effectiveness was correlated with parameters affecting performance (e.g. design, media, residence time/flow rate, temperature, oxygen, depth) in order to support the design of on- and off-site systems that will consistently remove plant and enteric pathogens as well as nutrients from agricultural runoff and wastewaters.

Links: http://www.farmfoodcareon.org/wp-content/uploads/2016/04/WAMQI-finalreport7.pdf
Keywords: denitrification woodchip bioreactor, biofilter, E.coli, pathogens, Petrifilm, nutrients edge-of-field, constructed wetlands