In addition, the Biofilter sustains greater hydraulic loading rates, without the plugging problems of sand or peat. The Waterloo principle is compared with a conventional sand filter in Figure 1. With sand, organisms can only grow on the outside of the grain. The Biofilter has the flow characteristics of gravel, but the surface area and absorptive capacity of silt. Separate flow paths are provided for water and air, with high porosity for microbial development.
Treatment is independent of soil and drainage conditions.
The Waterloo Biofilter System is a reliable, low-maintenance septic system for difficult sites. Due to its light weight and small size, the Biofilter is especially useful in small lots, remote areas, shallow bedrock, heavy clay, gravels and swampy grounds. Links-Loo Inc. manufactures a complete remote bathroom and treatment structure for use on golf courses. In addition, Architectural and Community Planning Inc. manufactures EconomadTM , a transportable mechanical utility plant for remote areas. Both these companies have chosen the Waterloo Biofilter for sewage treatment.