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Chlorine Dioxide Requires Reliable Monitoring Protocols
Author(s) -
Sadar Mike,
Malkqv Vadim,
Under Kevin,
Dehmlow Greg
Publication year - 2009
Publication title -
opflow
Language(s) - English
Resource type - Journals
eISSN - 1551-8701
pISSN - 0149-8029
DOI - 10.1002/j.1551-8701.2009.tb02026.x
Subject(s) - chlorine dioxide , process engineering , computer science , chlorine , sample (material) , turbidity , environmental science , reliability engineering , chemistry , engineering , inorganic chemistry , chromatography , oceanography , organic chemistry , geology
This article discusses how advanced reagentless monitoring technology, combined with key operations and maintenance (O&M) protocols, is helping water treatment facilities accurately detect and analyze chlorine dioxide (ClO 2 ) as low as 0.01 mg/L, even in treatment stages with wide variances in pH, turbidity, flow, pressure, and temperature. The article discusses the importance of accurately monitoring and measuring ClO 2 , and examines how the reagentless electrochemical method uses a stable membrane that is resistant to most interference and is independent of changes in sample pH. This new technology incorporates temperature correction algorithms that are applied to the raw measurement value to produce an accurate ClO 2 measurement in the sample stream. The technology can routinely deliver an accurate value in the μg/L range. Field use, monitoring requirements, and operation and maintenance protocols are all discussed.