Patent ID: 7052614

Claim:
A method for reducing effects in industrial process waters of an enzyme produced by a collection of microorganisms attached to a surface in an industrial water environment, the method comprising: causing a substance formed by the reaction of a hypochlorite oxidant and an amine source selected from the group consisting of ammonium bromide and ammonium chloride and capable of interfering with the production of an enzyme by a collection of microorganisms attached to a surface in an industrial water environment to contact said collection of microorganisms when attached to said surface in said industrial water environment by introducing said substance into water in said industrial water environment at a first concentration and for a first duration, and thereafter, after a second duration during which said substance is not introduced into said water, again causing said substance to contact said collection of microorganisms by again introducing said substance into said water in said industrial water environment, wherein said first duration and said first concentration are selected to be sufficient to substantially eliminate the production of said enzyme by said collection of microorganisms in said industrial water environment during said second duration, but insufficient to completely eradicate said collection of microorganisms and insufficient to inactivate said enzyme.