Gas bubbles forming during conventional water
treatment can be problematic for utilities, reducing
operating efficiency and interfering with all aspects of
treatment. Problems associated with bubble formation
include 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 phenomena
are fairly commonplace yet often unrecognized or overlooked
by the drinking water industry. More significantly,
engineers may not factor water supersaturation
into treatment plant design, leading to consequences
ranging from minor nuisances to complete failure of
new full-scale facilities.
Dissolved gas supersaturation was investigated at
several utilities. The case studies highlighted here and
the analyses of bubble formation will help water
providers in identifying, confirming, and mitigating the
adverse effects of bubble formation. In addition, the
authors suggest parameters that should be considered
in the design of a new treatment plant or modification
of an existing facility. Includes 6 references, tables, figures.
| Edition : | Vol. 99 - No. 5 |
| File Size : | 1
file
, 440 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 05/01/2007 |
