Air bubbles that form in water treatment filters create headloss and can form whenever
the total dissolved gas pressure exceeds the ambient hydrostatic solution pressure. The
location of potential bubble formation in filters can be predicted based on the clean bed
headloss with depth, flow rate, and influent total dissolved gas concentration. Bubble
formation within filters can be reduced if the ambient pressure within the filter was
increased by greater submergence (water head above the media), lower hydraulic flow
rate, or by use of a more porous media, these predictions were confirmed in bench-scale
testing. Bubbles trapped in the bed can be released by "burping", which can reduce the
extent of headloss buildup. Burping is more significant at lower flow rates and with a
lower density, higher porosity and hydrophobic anthracite layer.
Includes 12 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 370 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 14 |
| Published : | 06/15/2003 |
