Biodegradable sheet for culturing sewage denitrifiers

Details Biodegradable sheet for culturing sewage denitrifiers Biodegradable sheet for culturing sewage denitrifiers

1993-05-04

1994-05-31

Bell, James J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including interlaminar mechanical fastener

210903, 428296, D03D 300

Patent

active

053168321

ABSTRACT:
A biodegradable substrate in sheet form which acts as a source of carbon and hydrogen in oxygen-poor water in biological water-treatment stages. The substrate is covered with at least one layer of a population of spontaneously growing denitrifiers. The substrate is a spun-bonded non-woven fabric weighing 10 to 1500 g/m.sup.2. It has a prescribed effective area that results in an ideal rate of denitrification per clarification stage at a prescribed rate of flow per area and time. The fabric is comprised of at least 50% continuous poly-.epsilon.-caprolactone filament with a mean molecular weight of 20,000 to 70,000. The individual filaments adhere to each other at their intersections.

REFERENCES:
patent: 4362777 (1982-12-01), Miller
patent: 4769279 (1988-09-01), Graham

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