Slow sand filtration, a single-step complete water
purification system for low-turbidity waters, is easy to
operate and maintain, and therefore suitable in rural
areas that lack skilled personnel. One question that
has persisted in slow sand filtration design, particularly
for tropical countries, is whether filters need
to be covered.
Studies were conducted to assess slow sand filtration
performance under sun, shaded, and covered
conditions. The presence of algae in the raw water
filters marginally affected the length of filter run and
did not affect the filtrate quality in turbidity under all
modes of operation. No significant differences were
observed in functioning of slow sand filters in terms
of organic matter removal in the sun, shaded, or
covered filters, and the total throughput of all the
filters was comparable. These results suggest that
slow sand filtration systems can be designed without
a roof in tropical countries, thus reducing construction
costs. Includes 14 references, tables, figures.
| Edition : | Vol. 101 - No. 12 |
| File Size : | 1
file
, 450 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 8 |
| Published : | 12/01/2009 |
