The absorbent Waterloo Biofilter filter medium creates an ideal environment for microbial attachment. Beneficial bacteria colonize the interior surfaces of the filter medium where they are protected from predators, desiccation, and freezing. These microbes degrade and oxidize organic pollutants, coliform bacteria, ammonium, and other contaminants as the wastewater is retained in the filter medium by capillarity. Air passively circulates throughout the filter medium providing an aerobic treatment environment without the need for forced aeration.
The core of the Waterloo Biofilter system is our synthetic, absorbent filter medium that is configured as a free-draining, attached growth, biological trickling filter to treat sewage, process wastewaters, landfill leachate, and polish sewage lagoon discharge. This patented, engineered filter medium is consistent in its physical properties and has been optimized to:
Engineered for performance and reliability
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The Waterloo Biofilter® is an advanced onsite wastewater treatment system for off-sewer developments including residential single dwelling households and cottages, decentralized commercial and light industrial lands such as golf courses, resorts and restaurants, as well as large clustered or communal systems.
The patented technology efficiently treats sewage and other wastewaters, protecting our environment and ecosystems from pollutants such as E. coli, BOD, TSS, nitrogen, and even viruses. Proven in thousands of installations, Waterloo Biofilters are available in a variety of modular configurations that are easily scalable.
This attached growth process (also referred to as a fixed film process, intermittent filter, packed bed media filter, or percolating filter) outperforms activated sludge or suspended growth (suspended sludge) processes with lower energy requirements, fewer moving parts, simpler operation, less maintenance, and a better ability to handle shock loads of chemical addition or hydraulic overloads. Of high importance in Canada, the Waterloo Biofilter is proven in frigid -50°C temperatures, treating cold sewage with influent temperatures as low as 3°C. Compared to other media-based trickling filters,
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the Waterloo Biofilter does not slough off microbes in the form of aerobic sludge, maintains high treatment levels even in very cold climates, has longer retention times, and can accept much higher organic and hydraulic loads without plugging.
Waterloo Biofilters consistently provide tertiary, sand filter quality effluent (< 10 mg/L cBOD & TSS) that is clear and odourless. Highly treated effluent is easily and safely dispersed back into the soil via small, shallow disposal beds or trenches, or can be reused onsite for purposes such as irrigation, truck washing or toilet flushing.