CONTROL OF BIOFOULING IN AN INDUSTRIAL WATER SYSTEM

A method for control of biofouling in an industrial water system comprising copper surfaces includes concurrently monitoring in an industrial water system the concentration of chlorine oxidant concentration and of sodium sulfamate and providing both a chlorine oxidant source and a mixture of sodium sulfamate and halide ion source. The monitored chlorine oxidant concentration is compared to a pre-determined chlorine oxidant concentration. The chlorine oxidant source is added at a rate and in an amount sufficient to achieve at least the pre-determined residual oxidant concentration. The monitored concentration of sodium sulfamate is compared to a pre-determined concentration of sodium sulfamate and halide ion source. The mixture sodium sulfamate and halide ion source is added in an amount sufficient to achieve at least the pre-determined sodium sulfamate concentration. The addition and the amount of the addition of the mixture of sodium sulfamate and halide ion source to the water system is independent of whether or not chlorine oxidant is added and of the amount of chlorine oxidant that is concurrently added to the system. Corrosion in the copper surfaces occurs at a slower rate than would occur were at least the same amount of sodium sulfamate added to the system in the absence of the halide ion source. L~invention concerne un système et un procédé de stabilisation du brome dans un système d~eau industrielle par suivi et dosage souple des niveaux résiduels d~un oxydant à base de chlore et d~un stabilisant à base d~ion halogénure. Le système comprend un oxydant à base de chlore et une source d~ion halogénure avec un stabilisant halogéné.