wastewater treatment or purification working model for science project exhibition | DIY pandit
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The wastewater treatment model uses layers of gravel, sand, cotton, and coal to purify water.
Contaminated water is poured into the top layer, where gravel removes large particles.
Sand filters out smaller sediments, while cotton traps fine impurities.
Coal (or activated carbon) absorbs chemicals and odors.
This model demonstrates effective water purification techniques, highlighting the importance of clean water.