Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2003-06-27
2008-03-25
Barry, Chester T. (Department: 1724)
Liquid purification or separation
Processes
Treatment by living organism
C210S632000, C210S764000
Reexamination Certificate
active
07347941
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 sessileLegionella.
REFERENCES:
patent: 6093522 (2000-07-01), Kitteridge
patent: 6864196 (2005-03-01), Graham et al.
patent: 2697645 (1992-10-01), None
patent: WO 96/21499 (1996-07-01), None
patent: WO 01/23534 (2001-04-01), None
Indian First Examination Report dated Jan. 3, 2006.
Barry Chester T.
Novapharm Research (Australia) Pty Ltd
Sonnenschein Nath & Rosenthal LLP
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