National Environmental
Engineering Research Institute has developed a Earthen/plastic
pot filled with bleaching powder, sand etc. for purification
of water.
An earthen/plastic pot with 2-3 holes each in the lid and
the bottom is filled with gravel. A mixture of bleaching powder
and sand (1:4) is added and further filled upto top with gravel.
The pot is submerged in the well at 1 – 1.5 m depth with
help of a rope. The pot receives jerks whenever water is drawn
out through the bucket, which in turn helps leaching of bleaching
powder into the well. Residual chlorine concentration of 0.2
– 0.5 mg/L is maintained in the well water for about
a week.
Areas of Applications:
Can be used for disinfection of open dug
wells or elevated surface reservoirs used for water supply.
Equipment / Raw Materials:
Earthen/plastic pot of 5L capacity, rope,
binding wire. Course sand, gravel, bleaching powder, polythene
sheets.
Stage of Development:
Fully developed and available commercially.
Economic Data:
One pot for a 10,000 L water well with withdrawal
rate of 1000 L water/day will cost Rs.100/-
