NEETZoologyMicrobes in Human Welfare
The primary treatment of waste water involves the removal of
Options
- ADissolved impurities
- BStable particles
- CToxic substances
- DHarmful bacteria
Correct answer
B. Stable particles
Step-by-step solution
Treatment basically involves physical removal of particles from sewage through: (i) Filtration and (ii) Sedimentation These are removed in stages: (i) Initially floating debris is removed by sequential filtration. (ii) Then the grit (soil and pebbles) are removed by sedimentation