Please use this identifier to cite or link to this item:
Title: Ozone water treatment system for cooling towers : user guide specifications
Authors: Hock, V. F.
Piskin, Deniz
McLeod, Malcolm E.
Keywords: Corrosion and anti-corrosives
Waste minimization
Cooling towers
Publisher: Construction Engineering Research Laboratories (U.S.)
Series/Report no.: FEAP user guide (Construction Engineering Research Laboratories (U.S.));no. 97/132
Abstract: It has been observed that a major cause of scaling in cooling water systems can be attributed to the biological and organic content of the system. Traditionally, cooling water has been treated to prevent corrosion by addition of corrosion inhibitors, scale control chemicals, and biocides. Some common chromate additives are phosphorus, chlorine, and zinc compounds. Frequently, several different biocides are used in conjunction because a given organism can develop an immunity to a single biocide. In 1990, the U.S. Environmental Protection Agency (EPA) banned the use of chromates in these water systems, and other maintenance practices involving additive use, such as blowdown, are regulated because the discharge can carry harmful chemicals and hot water into publicly owned treatment works. The ability of ozone (03) to disinfect water has been known and used for years. Using ozone to treat cooling tower water is a relatively new procedure, however. Because of its promising energy saving and environmental benefits, its popularity is growing. Ozonification has been used for years to reduce the biological contaminants in the cooling tower water that is recycled in a closed system for building cooling. This technology is an alternative to the use of chemical biocides, which require maintenance and monitoring. The cost savings associated with this technology come mainly from labor savings, from the elimination of chemical treatment requirements to meet EPA clean water standards, and the low cost of installation. Further, industry experts claim ozone is a more effective biocide than chlorine and effectively destroys disease-causing bacteria such as the strains linked to Legionnaire's Disease. Moreover, because it is a short-lived compound that rapidly reverts to diatomic oxygen (02), ozone eliminates the concentration of traditional biocides in cooling water. In addition, some experts have reported that ozone can control certain kinds of corrosion and scale. A new cooling tower system installed at the U.S. Military Academy, West Point, NY, has used ozone as a standalone treatment for two cooling seasons.
Description: FEAP User Guide
Gov't Doc #: USACERL FEAP UG-97/132
Rights: Approved for public release; distribution is unlimited
Appears in Collections:Technical Report

Files in This Item:
File Description SizeFormat 
USACERL FEAP UG-97-132.pdf21.7 MBAdobe PDFThumbnail