19-06: Impact of Legionella Regulations on Water Treatment Programs and ControlImplementations of local Legionella regulations bring attention to cooling towers and their perceived Legionella risk. Following the enactment of a local regulation in the Province of Quebec in Canada, an observational prospective survey was undertaken by a leading water treatment firm. A review of a large dataset of Legionella culture results from more than 300 cooling towers with their associated water treatment program control over three years

Once optimized

and bio-mass microbiological control

An evolutionary improvement to existing plume abatement designs using a different heat transfer approach will be described

The operations history of these two large

The benefits of proper control are measurable and translate to improved system efficiency and reliability

including concrete cover to reinforcement

Methods for spot-checking towers

Surface analysis was used to identify passivation films and correlate their chemical composition to respective treatment and water conditions

After the trials

single facer type

Proper attention to cooling water systems operating and control parameters

Cooling tower drift is defined as the percent of circulating water flow that exits from the cooling tower fan stack in the form of fine water droplets and aerosols entrained in the exhaust air