Treating micro-organisms in water using boron conditioned...

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 3/00 (2006.01) C02F 1/00 (2006.01) C02F 1/50 (2006.01) C02F 1/68 (2006.01) C12S 3/00 (2006.01) A01N 33/20 (2006.01) A01N 43/80 (2006.01) A01N 63/02 (2006.01) A01P 1/00 (2006.01) C12N 9/14 (2006.01) C12N 9/96 (2006.01)

Patent

CA 2489559

The invention relates to methods and compositions for of treating water systems, particularly recirculating water systems contaminated by a biofilm containing sessile micro-organisms. The method includes the steps of forming a boron conditioned enzyme and contacting the biofilm with said boron conditioned enzyme, thereby planktonising the micro-organisms The boron conditioned enzyme retains a level of activity at least 40 % of the initial activity of the unconditioned enzyme for at least two hours after contacting the biofilm, either in the presence or absence of a biocide or corrosion inhibitor which would normally deactivate the enzyme. In preferred embodiments a biocide is added with the conditioned enzyme. The method and compositions are also applicable to remediation of tepid water systems in which biofilm may harbour pathogens such as sessile Legionella.

L'invention concerne des procédés et des compositions pour des systèmes de traitement de l'eau, notamment des systèmes de recirculation d'eau pollués par un film biologique contenant des micro-organismes sessiles. Ledit procédé consiste à former une enzyme conditionnée par du bore et à mettre le film biologique en contact avec ladite enzyme conditionnée par du bore, ce qui a pour effet de <= planctoniser >= les micro-organismes. L'enzyme conditionnée par du bore conserve un niveau d'activité d'au moins 40 % de l'activité initiale de l'enzyme non conditionnée pendant au moins deux heures après être entrée en contact avec le film biologique, en présence ou en l'absence d'un biocide ou d'un inhibiteur de corrosion qui désactive normalement l'enzyme. Dans des modes de réalisation préférés, un biocide est ajouté à l'enzyme conditionnée. Le procédé et les compositions de l'invention sont également applicables à la biorestauration de systèmes d'eau tiède dans lesquels le film biologique peut renfermer des pathogènes, tels que la Legionella sessile.

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