|
|
|
|
An NGO based in Pabal, called
Vigyan Ashram, currently
offers water testing to
the local community and
as part of its curriculum.
Vigyan Ashram uses a system
in which potentially polluted
water is mixed with a sterile
nutrient broth solution
(prepared from Mac Conkey
Broth powder) and incubated
for 48 hours in a water
bath at 37°C. The broth
is initially pink in colour;
if by the end of the procedure
it is yellow the broth has
been digested and so harmful
micro organisms must be
present. If no change in
the colour of the broth
is noted then the water
is considered to be safe
for drinking.
In Pabal there are 4-hour-long
power cuts twice a day,
which means that the water
bath cannot be kept at a
constant 37°C without
resorting to the use of
expensive batteries.
Full Description
|
Document Saved Successfully
|
|
|
|
|
|
|
