Effect of air space

Gorakh Chaudhary (20 liters water used)

Phase 1:
Raw samples: 250 ppb (before filtration)
After filtration:

Volume amoun Flow liter Flow mean Time Mean Arsenic
of water t of Rate per rate in flow required Time Conc. of
filtered water (sec hour terms of rate for required for filtered
(L) in the per % (%) volume of volume of water
basin 100 water to water to be ( ppb)
% ml) be filtered filtered
(Min) (Min)
2 100% 3 120 100% 100% 1 1 10
4 88% 4 90 75% 94% 3 2 10
6 75% 5 72 60% 71% 4 4 10
8 63% 6 60 50% 61% 6 6 5
10 50% 7 51 43% 48% 8 8 5
12 38% 10 36 30% 36% 11 11 5
14 25% 16 23 19% 24% 16 16 5
16 13% 26 14 12% 13% 24 23 5
18 0% 57 6 5% 6% 35 33 5

Phase 2:
Raw samples: 250 ppb (before filtration)
After filtration:

Volume amount Flow liter Flow Time required Arsenic
of water of water Rate per rate in for volume of conc. of
filtered in the (sec per hour terms water to be filtered
(L) basin 100 ml) of % filtered water(ppb)
(%) (Min)
2 100% 3 120 100% 1 5
4 88% 3 120 100% 2 5
6 75% 4 90 75% 4 5
8 63% 5 72 60% 6 5
10 50% 6 60 50% 8 5
12 38% 9 40 33% 11 5
14 25% 16 23 19% 17 5
16 13% 25 14 12% 25 5
18 0% 55 7 5% 35 5