Demonstration System Tour: Property FF2

Technologies: Waterloo Biofilter System with bottomless sand filter

For more information on recirculating foam filters: This technology is a proprietary device under the trade name Waterloo Biofilter® manufactured by Waterloo Biofilter Systems Inc. For more information on this system technology, see the vendor website at www.waterloo-biofilter.com.

Year Installed: Spring 2003

Site Description:

• 2.2 acre lot, 2-bedroom house, 4 residents year round (design flow: 300 gallons per day)
• Wetlands within 200’ of system
• Glacial till
• Limiting factors: Water table 18” from the surface; Stream runs across property
• Public water supply
• Previous system: conventional septic system (failing)
  

System Treatment Train:

Wastewater exits the home through a building sewer (A) and enters a 1,500 gallon, two-compartment, concrete septic tank (B). A time-dosed pump doses effluent from the tank to the top of the foam filter (C), where it percolates down through the foam cubes. The treatment unit consists of a concrete tank filled with baskets of foam cubes. The effluent collects below the foam in the concrete tank where the flow is demand dosed through a splitting device which recirculates 50% of the effluent back to the septic tank, and doses the remaining effluent to the bottomless sand filter (D) for final treatment and dispersal.