Treating micro-organisms in water using boron conditioned enzymes and composition therefor
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United States of America Patent
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Mar 25, 2008
Grant Date -
Nov 3, 2005
app pub date -
Jun 27, 2003
filing date -
Jun 28, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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