G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 31/22 (2006.01) G01N 1/00 (2006.01)
Patent
CA 2329953
A method and system for directly monitoring and controlling a continuous process stream for dechlorination residual is provided. A sample stream to which a dechlorination agent has been added to completely eliminate a residual disinfectant is continuously drawn off. An analyzing agent of iodine is provided by introducing an iodide solution, a chloramine-T solution, and an acetic acid buffer into the sample stream. The reagents quickly react to produce iodine that reacts with any residual disinfectant removal agent residual that may be present. Thereafter, the sample stream is continuously analyzed to determine the amount of unreacted iodine remaining in the process sample. Based on the amount of iodine added to the process sample and the amount of unreacted iodine remaining in the sample after reaction, the amount of dechlorination residual is continuously determined. The amount of dechlorination agent added upstream to the process stream is continuously selectively varied using the determined amount of dechlorination residual present in the process sample.
Bonnick David Macdonald
Foster Kevin Anthony
Stannard James W.
Smart & Biggar
United States Filter Corporation
Usfilter Corporation
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