AWWA JAW63325

Water utilities rely on turbidity and particle-countdata as a gauge of water quality, but gas bubbles canmeasure as false particles or turbidity and disrupt theoperation of turbidimeters and particle counters.Because bubbles are harmless, it is important forutility managers to know when they are causingspikes in turbidity or particle counts. In this work,the investigators measured bubbles in bench-top laboratoryexperiments and at a full-scale utility.Although utility managers have long suspected bubblesof interfering with turbidity and particle countmeasurements, this is the first study that confirmsthat hypothesis. The results also point out the needfor routine quality assurance/quality control(QA/QC) for turbidimeters and particle counters,especially when bubbles are suspected. The studyclearly showed that improved QA/QC on particlecounters and turbidimeters is necessary in watertreatment applications where dissolved gas supersaturationoccurs. Includes 31 references, table, figures.

Product Details

Edition:

Vol. 98 - No. 7

Published:

07/01/2006

Number of Pages:

13

File Size:

1 file , 440 KB