Waste treatment method and apparatus with integral membrane...

C - Chemistry – Metallurgy – 02 – F

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C02F 3/18 (2006.01) C02F 3/02 (2006.01) C02F 3/12 (2006.01) C02F 3/30 (2006.01) C02F 9/02 (2006.01) C02F 9/14 (2006.01)

Patent

CA 2651220

A wastewater treatment method and apparatus including a denitrification (anoxic) chamber for denitrifying wastewater, an aeration basin with Bio-Wheel for aerating the wastewater, and a membrane device in which sludge particles are separated out of the wastewater, leaving clean discharge water and reusable sludge. Sludge from the membrane chamber floor is sent back to the aeration basin or denitrification chamber or both. Excess sludge is wasted or held for further processing. Preferably, the method and apparatus facilitate both activated sludge and fixed film processes.

L'invention porte sur un procédé et un appareil de traitement d'eaux usées comprenant une chambre de dénitrification (anoxyque); un bassin d'aération à roue Bio; et un dispositif à membrane servant à séparer les boues de l'eau. On obtient ainsi de l'eau propre et des boues réutilisables. Les boues se trouvant sur le sol de la chambre à membrane sont renvoyées dans le bassin d'aération et/ou dans la chambre de dénitrification. Les boues en excès sont rejetées, ou conservées pour des traitements ultérieurs. Lesdits procédé et appareil sont de préférence utilisés pour produire des boues activées et des films fixés.

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