Wastewater treatment process

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 3/34 (2006.01) C02F 3/12 (2006.01)

Patent

CA 2334397

This invention relates to a wastewater treatment process for treating nitrogen- deficient wastewater. The process enables the production of a low soluble nitrogen processed wastewater, and avoids the need for nitrogen supplementation in the wastewater treatment process. The process includes providing a supply of nitrogen-deficient wastewater to a controlled environment. The conditions in the controlled environment encourage the proliferation of nitrogen-fixing microorganisms, in particular by control of the stability of the dissolved oxygen level. This process may be used alone or in conjunction with a conventional wastewater treatment process, relying on non-nitrogen-fixing microorganisms, without the need for nitrogen supplementation.

Cette invention se rapporte à un procédé de traitement d'eaux usées servant à traiter des eaux usées pauvres en azote. Ce procédé permet de produire des eaux usées traitées à faible teneur en azote soluble et évite de recourir à l'adjonction d'azote dans le procédé de traitement des eaux usées. Ce procédé consiste à acheminer une source d'eaux usées pauvres en azote dans un milieu contrôlé. Les conditions de ce milieu contrôlé encouragent la prolifération de micro-organismes fixant l'azote, notamment par régulation de la stabilité du niveau d'oxygène dissous. Ce procédé peut être utilisé seul ou en association avec un procédé de traitement d'eaux usées classique, utilisant des micro-organismes ne fixant pas l'azote, sans qu'il soit nécessaire d'ajouter de l'azote.

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