Methods and apparatus for biological treatment of waste waters

Details Methods and apparatus for biological treatment of waste waters Methods and apparatus for biological treatment of waste waters

C - Chemistry, Metallurgy

02

F

C02F 3/22 (2006.01) C02F 1/24 (2006.01) C02F 3/12 (2006.01) C02F 3/30 (2006.01) C02F 11/02 (2006.01) C02F 11/18 (2006.01) F16L 9/18 (2006.01) C02F 1/32 (2006.01)

Patent

CA 2476614

In a vertical shaft bioreactor, improved devices and methods are provided for enhanced secondary and/or tertiary treatment of wastewater, including residential, municipal and industrial wastewater. The devices and methods of the invention are useful for enhanced secondary wastewater treatment, including BOD and TSS removal. Tertiary treatment can alternately or additionally be achieved in the biorecator with nitrification of ammonia, with nitrification and denitrification, and with nitrification, denitrification, and chemical phosphorus removal. A vertical shaft bioreactor is also provided which achieves thermophilic aerobic digestion and pasteurization of sewage sludges, optionally to produce class A biosolids.

La présente invention concerne des perfectionnements apportés à des dispositifs et des procédés destinés à un bioréacteur à puits vertical, en vue d'un retraitement secondaire et/ou tertiaire renforcé des eaux usées, domestiques, industrielles et de voirie. Ces dispositifs et procédés conviennent particulièrement pour un renforcement du retraitement secondaire des eaux usées, et notamment pour l'élimination de la demande biochimique d'oxygène et des solides totaux en suspension. Le retraitement tertiaire peut intervenir de façon substitutive ou complémentaire dans le bioréacteur, à raison d'une nitrification de l'ammoniac, d'une nitrification et dénitrification, et d'une nitrification dénitrification et élimination du phosphore chimique. L'invention concerne également un bioréacteur à puits vertical capable de digestion aérobie thermophile et pasteurisation des boues résiduaires, éventuellement pour produire des biosolides de classe A.

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