V G
Surendhar and R Thiruvenkadam, students of the Civil Engineering department,
put their heads together to build the “Modified Roughing Filter”. Their concern
for the depleting water resource was their motivation to build this low cost
filter hoping that they could in some way help reduce water pollution in the
country. All the materials needed to build this filter are cheap and easily
available.
It is
true that the roughing filter is already in existence but the modified roughing
filter incorporated newer techniques to yield water that is safe for reuse.
Adsorption, mechanical trapping and screening techniques are used to ensure
this. Contaminated water is passed through five tanks. The first tank contains
large gravel, the second medium sized gravel, the third has bricks, the fourth
thank contains chips and the last is filled with activated charcoal. Each of
these removes one of the major contaminants of water.
Testing
of the purified water showed that water was indeed much cleaner with all
contaminants well below the permissible limit.
Clearly
the roughing filter shows creativity, talent and the desire to work for the
greater good among these young future engineers.
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