Liquid purification or separation – With gas-liquid surface contact means
Patent
1999-05-21
2000-07-11
Upton, Christopher
Liquid purification or separation
With gas-liquid surface contact means
210169, 210170, 2102421, 210602, 47 64, 119260, C02F 332
Patent
active
060867558
ABSTRACT:
A floating hydroponic biofiltration device for use in a body of oxygenated water containing plant-eating fish, includes, in series, (a) a float and a terrestrial plant hydroponically mounted in a float aperture, the float aperture being essentially devoid of soil, (b) a relatively open mesh of substantial depth below the float, the mesh being open at the sides thereof to enable passage of oxygenated water from the body of water therethrough, and (c) a relatively tight matting defining tortuous vertically extending passageways therethrough for the plant roots, the matting anchoring the plant roots and at least partially excluding plant-eating fish from a portion of the plant roots passing therethrough. Preferably the device additionally includes, beneath the matting, a netting to exclude large plant-eating fish from approaching from below the bottom of the matting. The mesh defines vertically extending passageways therethrough for the plant roots while also serving as a substrate surface for the growth of nitrogen-converting bacteria deposited thereon, the mesh excluding large plant-eating fish from a portion of the plant roots passing therethrough while permitting relatively smaller plant-eating fish to pass therethrough and deposit nitrogen-converting bacteria and their ammonia-containing fish waste.
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E-Mail from Akzo Nobel Geosynthetics.
Excerpts from brochure of Oasis Grower Products.
Excerpts from Aquatic Eco-Systems, Inc.
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