78-09: Chlorine Dixide Use in Cooling Systems Using Sewage Effluent as Make-up Cooling Tower Water Chemistry

78-09: Chlorine Dixide Use in Cooling Systems Using Sewage Effluent as Make-up Cooling Tower Water ChemistryWhen the City of Burbank engineers decided in 1967 to use sewage plant effluent for cooling tower makeup without removing the phosphate and without final filtration, it was a bold decision. Although there were many installations utilizing sewage plant effluent for cooling and even some for boiler water makeup, these installations pretreated with lime to remove the phosphate from the water.

and bio-mass microbiological control

A comprehensive review of the process and its benefits will be presented

Whether using galvanized steels

where it is shown that the process can produce make-up water at a fraction of the apex of conventional processes

performance data from field trials will be presented that compares efficacy and cooling system operation during treatment with Aseptrol biocide to baseline data collected during treatment with other biocides

Research engineers have been striving hard to strike a balance between airflow produced and power consumed that will make the fan of optimum efficiency

Four fan cells of a 30-year old

The report presents the result of ASHRAE’s controlled

mechanism and pitting inhibition are covered in some detail

The paper also discusses improvements that are underway to the biocide and scale-inhibitor feed systems

The chemical testing performed then becomes a check on the control

The polymers used are chosen on the basis of the overall isotherm and the slope in the Henry's Law region of the isotherm