Water Purification
Water Purification
Ø Earth
Land - Water Ratio: - Water 71%, Land 29%.
Ø Out of
71%, only 3% water is available for drinking.
Ø Water
makes up 60% of a person's body weight.
Ø Keeping
cells alive, transporting body fluids, metabolism of food, keeping body
temperature cool, excretion are the major functions of water.
Ø Safe
drinking water - Water should be free of germs.
It should be clean (colorless, transparent, not turbid), not salty, not
smelly, not odorless, not harmful, water free from chemical pollutants.
Measurement of water
Ø Round
well formula - Diameter class 4 Water depth x 785 = Total liters of water (in
all measured meters)
Ø Square
well / tank formula: - Length x width x Water depth (height) 5 1000- Total
liters of water. Water Purification (in all measured meters): 5 g TCL for 100
liters of water Using powder.
TCL Powder
Ø Lara
Farm - Troprical Chloride of lime
Ø Formula
– CaOCL2
Ø Currently
only TCL powder is used for public water purification.
Ø TCL,
the powder itself is called bleaching powder.
TCL powder type
Ø grade-1-
contains 36% chlorine.
Ø Grade -
It contains 33% chlorine. Always use at
least 33% chlorinated TCL powder for water purification. Powders with at least 20% chlorine also work.
Water tests
Ø longform
- orthotolidine
Ø contains
free chlorine in the water.
Ø Half an
hour after purification O.T. Should be
taken. (30 min.)
Ø 0.2 to
0.5 ppm in water. As much as O.T. Must come.
Ø When
water containing TCL is tested, the water in the test tube turns 'yellow'.
Ø If TCL
powder is added to the water, it turns brown / red.
Ø OT
usually lasts 6 to 8 hours in water.
HPSF purification
Ø 4inch
diameter HPSF - is done in 500 ml (1/2 liter) of water with 150 g of TCL
powder.
Ø HPSF of 6inch diameter is made by taking 300 gms
of TCL powder in 1 liter of water.
Mother solution (distributed through
school) is taken in 1 liter of water with 200 g of TCL powder. Mother solution (distributed through school).
200 liters of TCL powder in 1 liter of water
0 Comments