77-14: Hexavalent Chromium Reduction in Cooling Tower Blowdown-Evaluation of Cleaning Systems

77-14: Hexavalent Chromium Reduction in Cooling Tower Blowdown-Evaluation of Cleaning SystemsThe heavy metals content of wastewaters is being regulated in many areas of the world. In particular, the concentration of chromium which can be discharged in effluents is being severely restricted. The EPA has imposed a 0. 25 mg 1 total chromium limit on gas plant effluents in Texas.

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The purpose of this guideline is to provide practices that reduce the risk of exposure to Legionella from evaporative head rejection systems

The findings of this study constitute a major step forward for the cooling technologies industry

Additionally a simplified viscoelastic model has been derived from that data to get a general idea for the engineering of plastic fills

These standards range from complete elimination of chromates to low effluent levels requiring the installation of elaborate and costly treatment systems which reduce and precipi­tate the chrome

This paper will address some of the unexpected events that surfaced during activation of the cooling tower systems

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The most important utilization of cooling tower water is the answer to the question

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not only of the subject cooling system