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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.
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.
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.

 

Copyright 2006 URI Water Quality Program