19-06: Impact of Legionella Regulations on Water Treatment Programs and Control Ozone

19-06: Impact of Legionella Regulations on Water Treatment Programs and Control OzoneImplementations 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

alcohol plants

This paper discusses how mixed oxidants

and improved appearance

nor is there a generally accepted method for verifying that the estimated water savings was realized

This approach depends on assumptions that are acceptable if the tower test is conducted within CTI code requirements

A concise and practical review of the softening process chemistry

with various biocides

and in 1965

a creative combination of mechanical and chemical approaches was employed to make a process wastewater suitable for use as cooling tower makeup water

with five ppm of iron in the make-up water

The most nearly correct approximation of airflow through a tower can be obtained by incrementally moving through the tower from air inlet to outlet while calculating mass flows

Several examples of pro­posed methods to achieve Zero Discharge are put forth and advantages and Iimitations are examined