C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/44 (2006.01) B01D 53/22 (2006.01) B01D 53/85 (2006.01) B01F 3/04 (2006.01) C02F 3/10 (2006.01) C02F 3/20 (2006.01) C02F 3/28 (2006.01) C02F 3/30 (2006.01)
Patent
CA 2300209
An apparatus to transfer gas to or from a liquid has a flexible and oxygen permeable but liquid water impermeable membrane, a flexible and gas permeable spacer, an inlet conduit, an outlet conduit and a non-rigid restraint system. The membrane encloses an inner space containing the spacer and the spacer and the membrane together form a planar element. The inlet conduit and outlet conduit allow gases to flow into and out of the planar element. The non rigid restraint system permits the planar element to be fixedly but non-rigidly restrained in a selected position in a selected reactor. A module is made by attaching a plurality of the apparatus to a manifold located above a liquid surface of a reactor, the planar elements being located below the liquid surface. When used for treating wastewater, an aerobic biofilm is cultured adjacent the planar elements, an anoxic biofilm is cultivated adjacent the aerobic biofilm and the wastewater is maintained in an anaerobic state. Other uses include water degassing, humidification, pervaporation and air cleaning.
Behmann Henry
Cote Pierre
Pedersen Steven Kristian
Bereskin & Parr
Zenon Environmental Inc.
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