Environmental Engineering Reference
In-Depth Information
TABLE 30.15
Comparison of Boil, Bottle, and ZZ Methods for Drinking Water Puriication
One Day
One Year
Electric
Power
(kWh)
Electric
Power
(kWh)
Energy
Saved
(kWh)
Money
Saved
(USD)
Water
Volume (L)
Process
Time (min)
Cost
(USD)
Water
Volume (L)
Cost
(USD)
Time Saved
(h)
Method
One Person
Boil
2
33.7
0.573
0.13
730
209.15
46.02
-
-
-
Bottle
2
-
-
0.75
730
-
273.75
-
-
ZZ (500 g)
2
4.0
5.37
0.59
730
5.37
0.59
203.78
a
45.43
a
,
273.16
b
29
a
Family of Four Persons
Boil
8
142
2.5
0.55
2920
912.5
200.75
-
-
-
Bottle
8
3.00
2920
1095.00
ZZ (2 kg)
8
32
10.74
2.36
2920
10.74
2.36
901.76
a
198.39
a
,
1092.64
b
110
a
Note:
One person drinks 2 L of water a day according to WHO.
Electric power cost in Cuba is estimated in 1 kWh = 0.22 USD.
Time of boiling water process = time to obtain 100°C + 10 min of boiling suggested by WHO.
One person needs 500 g of ZZ a year.
Bottled water price 5 L: 1.90 USD.
a
Comparison with boiled water.
b
Comparison with bottled water.
