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96493 ESTIMATING TOTAL AQUEOUS AND AIRBORNE CHEMICAL EMISSIONS FROM OZONATED AND CHEMICALLY TREATED COOLING TOWERS

Product Number: 51300-96493-SG
ISBN: 96493 1996 CP
Author: Alan Pryor
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Cooling tower operations result in aqueous and airborne emissions into the environment in the form of blowdown and drift, respectively. Increased regulatory and licensing requirements often obligate end users to quantify the nature and amount of any added chemicals in such emissions. This paper presents a methodology whereby cooling tower operators can perform such calculations for conventionally chemically treated cooling towers as well as ozonated cooling towers. Emissions from cooling towers depend on the operating characteristics of the tower (recirculation rate, drift rate), makeup and cooling water quality (makeup water mineral concentration, cooling water cycles of concentration), the amount of chemicals added to the cooling water, and/or the amount of ozone injected into the cooling water ard the mass transfer efficiency of the ozone injection process.
Cooling tower operations result in aqueous and airborne emissions into the environment in the form of blowdown and drift, respectively. Increased regulatory and licensing requirements often obligate end users to quantify the nature and amount of any added chemicals in such emissions. This paper presents a methodology whereby cooling tower operators can perform such calculations for conventionally chemically treated cooling towers as well as ozonated cooling towers. Emissions from cooling towers depend on the operating characteristics of the tower (recirculation rate, drift rate), makeup and cooling water quality (makeup water mineral concentration, cooling water cycles of concentration), the amount of chemicals added to the cooling water, and/or the amount of ozone injected into the cooling water ard the mass transfer efficiency of the ozone injection process.
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