AWWA JAW64705

Gas bubbles forming during conventional watertreatment can be problematic for utilities, reducingoperating efficiency and interfering with all aspects oftreatment. Problems associated with bubble formationinclude floating floc during coagulation and sedimentation,head loss in media filters and upflow clarifiers,erratic particle counts, and erroneous turbidity measurements.This research found that these phenomenaare fairly commonplace yet often unrecognized or overlookedby the drinking water industry. More significantly,engineers may not factor water supersaturationinto treatment plant design, leading to consequencesranging from minor nuisances to complete failure ofnew full-scale facilities.Dissolved gas supersaturation was investigated atseveral utilities. The case studies highlighted here andthe analyses of bubble formation will help waterproviders in identifying, confirming, and mitigating theadverse effects of bubble formation. In addition, theauthors suggest parameters that should be consideredin the design of a new treatment plant or modificationof an existing facility. Includes 6 references, tables, figures.

Product Details

Edition:

Vol. 99 - No. 5

Published:

05/01/2007

Number of Pages:

11

File Size:

1 file , 440 KB