Orp In Cooling Water Treatment

Add hydrogen peroxide a strong oxidizer to a wastewater sample and the orp will increase resulting in a positive millivolt mv value.

Orp in cooling water treatment. When treating cooling water with multiple oxidizing biocides all of the oxidizing species will impact the orp reading. As you can tell by the previous paragraphs orp is used for drinking water swimming pools and spas. Environmental concerns have also driven the increased use of ph and oxidation reduction potential orp controllers in cooling water systems. After the use of heavy metals was banned the simple treatment method to control chromate passivation could not be used to protect the cooling systems.

Although orp levels typically correlate with the ratio of sanitizer in the water orp does not measure sanitizer levels. Measurement of orp offers major improvements over treatment programs using residual control of an oxidizing microbiocide resulting in improved life for heat exchangers and cooling towers minimal usage of treatment chemicals for chlorinating and dechlorinating and increased efficiency of plant processes that utilize the cooling water for heat exchange purposes. However orp is also used for cooling tower disinfection groundwater remediation bleaching cyanide destruction chrome reductions metal etching fruit and vegetable disinfection and dechlorination. In addition to being used to monitor water quality in chlorinated pools orp meters are widely used in the food processing and water treatment industries to ensure that water is free of contaminants and safe to recycle or consume.

Oxidation reduction potential orp is a measurement of sanitizer effectiveness in water. From a water treatment perspective orp measurements are often used to control disinfection with chlorine or chlorine dioxide in cooling towers swimming pools potable water supplies and other water treatment applications. Fundamentals of orp for cooling towers the measurement of oxidation reduction potential orp is by no means new. Microbiological treatments may require control of ph and other water quality parameters to ensure maximum effectiveness.

Both oxidation and reduction are chemical processes involving the transfer of electrons between molecules gaining or losing an electron. Orp theory is best summarized as providing an indication of the ability of a solution the wastewater mixed liquor suspended solids etc to oxidize or reduce another solution. However it has only been within the last decade that a significant number of power plants have begun to realize the. For example studies have shown that the life span of bacteria in water is strongly dependent on the orp value.

However it has only been within the last decade that a significant number of power plants have begun to realize the benefits of orp measurement for cooling water systems makeup water systems and the steam water cycle. For example chlorine oxidizing biocide is most effective between ph 6 5 and 7 5.