| Treatment
Technology: Recirculating
foam filter |
Foam filters
use 2- to 3-inch cubes of open-cell polyurethane foam material
that is randomly arranged in prefabricated modular units,
typically in cylindrical wire baskets. The foam filters are
usually configured with a single tank, using programmable
timer and controls. The effluent is distributed evenly over
the foam media by helical-type spray nozzles. |
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|
| A
treatment train containing a recirculating foam filter |
Wastewater flows out of the home through a building sewer (A)
and into a two-compartment tank (B). Effluent is pressure dosed
using a time dosed pump located in the second compartment of
the tank. Effluent is distributed over the top of the foam
media (C), flows down through the foam media and to the base
of the filter. Filtrate collects in a sump area at the filter
base, where a second pump is located. This pump pressure doses
foam filter effluent, a portion of which flows back to the
inlet end of the septic tank. In this example the remaining
effluent is pressure dosed to a bottomless sand filter (D)
where additional treatment and dispersal occurs.
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|
| Treatment
performance observed for recirculating foam filters in RI |
| System |
BOD5 |
TSS |
TN |
% TN Reduction |
Fecal Coliform |
Coming Soon! |
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| For
more information on recirculating foam filters: |
| Web
Links: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. |
