ABF 4
Volume of Water filtred (L) vs Time (Min)
20
18
16
14
Volume of water filterd(L)
12
10
8
6
4
2
0
0 5 10 15 20 25
Time (min)
Phase 1 Phase 2 Phase 3 Phase 4 Mean curve
Figure 19: ABF 4 Volume of filtered water (L) vs Time (min)
In the case of ABF 4 four initial samples for every phase show the same time required to fill same
volume of water filtered. Afterwards, phase 2 and phase 4 curves show different time required to
fill filtered water with compare to other curves.
54
, 4.4 The social acceptance of the filter
To study the social acceptance of the filter there were some general questionnaire asked to the
users.
According to the general questionnaire asked to the users in Magarmuda Tole, Panchanagar
VDC, it was found that there were 25 users of Arsenic Biosand filter. These users were very
much happy with the performance of Arsenic Biosand filter.
The users like high filtration rate, simple operation and minimal maintenance. They also like the
filters’ ability to remove color (iron), foul taste and odor (organic substance H2S), producing
aesthetically pleasing water (Ngai.T 20003). They also think the filter is durable and permanent
drinking water solution. It was also found that due to the filter capacity to produce pure water the
user said that they found the water taste good for cooking.
According to the questionnaire asked it was found that the people living in this Tole are aware of
disease caused by drinking arsenic contaminated water. They are now ready to pay for the filter.
It was found that at first when filter was distributed for free in that Tole by Nepal Red Cross
Society, the people thought that it was useless, but now they are ready to pay for the filter. From
this fact it can be seen that the acceptance of filter is increasing.
55
Volume of Water filtred (L) vs Time (Min)
20
18
16
14
Volume of water filterd(L)
12
10
8
6
4
2
0
0 5 10 15 20 25
Time (min)
Phase 1 Phase 2 Phase 3 Phase 4 Mean curve
Figure 19: ABF 4 Volume of filtered water (L) vs Time (min)
In the case of ABF 4 four initial samples for every phase show the same time required to fill same
volume of water filtered. Afterwards, phase 2 and phase 4 curves show different time required to
fill filtered water with compare to other curves.
54
, 4.4 The social acceptance of the filter
To study the social acceptance of the filter there were some general questionnaire asked to the
users.
According to the general questionnaire asked to the users in Magarmuda Tole, Panchanagar
VDC, it was found that there were 25 users of Arsenic Biosand filter. These users were very
much happy with the performance of Arsenic Biosand filter.
The users like high filtration rate, simple operation and minimal maintenance. They also like the
filters’ ability to remove color (iron), foul taste and odor (organic substance H2S), producing
aesthetically pleasing water (Ngai.T 20003). They also think the filter is durable and permanent
drinking water solution. It was also found that due to the filter capacity to produce pure water the
user said that they found the water taste good for cooking.
According to the questionnaire asked it was found that the people living in this Tole are aware of
disease caused by drinking arsenic contaminated water. They are now ready to pay for the filter.
It was found that at first when filter was distributed for free in that Tole by Nepal Red Cross
Society, the people thought that it was useless, but now they are ready to pay for the filter. From
this fact it can be seen that the acceptance of filter is increasing.
55
