Methods of tangential flow filtration and an apparatus...

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/68 (2006.01)

Patent

CA 2516836

Processes and apparati are provided for separating molecules of interest from a mixture containing them which comprises subjecting the mixture to an improved method of tangential flow filtration (TFF). The improved TFF was used to clarify, and process various feedstreams for the removal of a molecule of interest. According to a preferred embodiment, a transgenic milk feedstream is stabilized and particulate matter such as fat, casein miscelles and bacteria are removed. The method of TFF used in the current invention utilizes optimized process parameters that include temperature, transmembrane pressure, cross-flow velocity, and milk concentration. Cleaning and storage procedures were also developed to ensure long membrane life. An aseptic filtration step was also developed to remove any bacteria remaining in a clarified transgenic milk feedstream.

Procédés et appareils permettant de séparer des molécules étudiées d'un mélange les contenant, lesdits procédés consistant à soumettre le mélange à une méthode améliorée de filtration tangentielle (TFF). Cette TFF améliorée a été utilisée pour clarifier et traiter divers flux d'alimentation en vue de l'extraction d'une molécule étudiée. Selon un mode de réalisation préféré, un flux de lait transgénique est stabilisé et la matière particulaire telle que la matière grasse, les micelles de caséine et les bactéries est éliminée. Le procédé de TFF utilisé dans la présente invention repose sur l'utilisation de paramètres de processus optimisés qui comprennent la température, la pression transmembranaire, la vitesse tangentielle et la concentration de lait. Des procédures de nettoyage et de stockage ont également été mises au point pour assurer à la membrane une longue durée de vie. Une étape de filtration stérile encore été mise au point pour éliminer toute bactérie restant dans un flux de lait transgénique clarifié.

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