BACTERIA BIOCONTROL BIOCIDES CHEMICAL TREATMENT CHLORINE CHLORINE DIOXIDE COOLING TOWERS COOLING WATER EPA

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Abstract

Various biocide technologies have been used successfully in water treatment applications for many years to control microbial growth and reduce fouling on critical surfaces. These include oxidizers, such as chlorine, bromine, ozone, chlorine dioxide, and peracetic acid, and non-oxidizing biocides, including chloromethyl/methylisothiazolones, glutaraldehyde, dibromonitrilopropionamide (DBNPA), bromonitropropanediol (bronopol), quats, and dithiocarbamates (1-4). Many common treatment programs employ non-oxidizers in conjunction with standard oxidant programs for a broad-based approach to microbial control. The overall efficacy of any given biocide is a function of its general spectrum of activity, mechanism of action, stability under environmental conditions, and compatibility with systems components and additives.

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