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| Treatment
Technology: Textile
Filter |
Composed
of geosynthetic fabrics or geotextiles, these filters provide
surface area within the media itself and void volume between
the pieces of media. Textile filters have two common configurations:
(1) randomly-sized textile coupons arranged in three separate
horizontal lifts and (2) vertically hanging sheets of textile
fabric. As a result of advances in the technology, the coupon-configuration
is no longer being used in new installations. The textile
material is contained in a prefabricated fiberglass container. |
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| A
treatment train containing a textile filter |
Wastewater
leaves the home through the building sewer (A) flowing by
gravity to the processing tank (B), where solids, fats, oils,
and greases are trapped and stored. Wastewater is pumped
(C) to the textile media filter (D), where the textile media
and bacteria reduce the strength of the wastewater before
it is recirculated back to the inlet-end of the processing
tank, where nitrogen removal occurs. Recirculation continues
until the effluent level in the processing tank is high;
at this point the effluent is routed (E) to a drainfield
pump chamber (F) and pumped to the final dispersal technology;
in this example, a bottomless sand filter serving as a drainfield
(G). The effluent is dispersed onto and filters through specific
sand media in the bottomless sand filter before it reaches
the shallow surface soils where further nutrient removal
and pathogen reduction may occur. |
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| Treatment
performance observed for textile filters in RI |
| System |
BOD5 |
TSS |
TN |
% TN Reduction |
Fecal Coliform
CFU
|
Waterloo
Biofilter |
6.6mg/L |
4.2mg/L |
14.8mg/L |
N/A |
16.149mg/L |
| For
more information on textile filters: |
| Web
Links: This
technology is a proprietary device under the trade name
AdvanTex®, manufactured
and distributed by Orenco Systems®, Inc. For further
information about this technology, see the vendor website
at www.orenco.com. |
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