Bacteria, fungi, algae, and protozoa are the microorganism
classes of concern in cooling water systems. To control the
growth of these organisms, programs employing oxidizing
microbicides, nonoxidizing microbicides, and
biodispersants are often used. This technical committee
report discusses specific technologies used to control these
classes of microorganisms. This report provides owners,
engineers, contractors, and operators with specific
information on the types of organisms found in cooling
systems, a list of common chemistries used for their control,
and methods that are typically employed to monitor
systems. Its intent is not to serve as a guide to set up a
microbiological control program, but to assist users in
understanding the components of in-place programs and
discuss the treatment program typically used to avoid
misapplication. While this report includes a list of common
technologies used to treat biofouling, it is not meant to be
exhaustive.