Civil Engineering - Water Supply Engineering - Discussion
Discussion Forum : Water Supply Engineering - Section 3 (Q.No. 10)
10.
The maximum permitted loss of head in a rapid sand filter, is
Discussion:
8 comments Page 1 of 1.
Meena said:
3 years ago
For rapid sand filter :
The maximum loss of head = 2 to 5 m.
So maximum loss = 5m.
Spacing of laterals = 15 to 30 cm c/c.
Maximum spacing is 30 cm.
The maximum loss of head = 2 to 5 m.
So maximum loss = 5m.
Spacing of laterals = 15 to 30 cm c/c.
Maximum spacing is 30 cm.
Wrick said:
5 years ago
For slow sand 15cm to 75 cm.
For rapid sand 2m to 4m.
For rapid sand 2m to 4m.
Heera said:
6 years ago
Slow sand filter:
Loss of head: 0.1 m ( initial limit).
: 0.8 to 1.2 m ( final limit).
Rapid sand filter :
Loss of head: 0.3 m ( initial limit).
: 2.5 to 3.0 m (final limit).
Loss of head: 0.1 m ( initial limit).
: 0.8 to 1.2 m ( final limit).
Rapid sand filter :
Loss of head: 0.3 m ( initial limit).
: 2.5 to 3.0 m (final limit).
(1)
Heera said:
6 years ago
The permissible negative head loss of a rapid sand filter is 0.8-1.2m.
When the permissible limits are reached, the filter run is terminated and the filter is back washed.
When the permissible limits are reached, the filter run is terminated and the filter is back washed.
Ranjan barman said:
6 years ago
Max Permissible loss of head is 2.5 m for rapid sand filter.
Vipul Rabari said:
7 years ago
2 to 3 m is right.
Roy said:
8 years ago
Actually, it's 3 to 3.5 m and 150 to 750 mm for slow sand filter.
Kamal said:
8 years ago
Most accurate answer is 2.5.
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