Explain the different steps involved during primary treatement phase of sewage.

Explanation

The primary phase of sewage treatment involves physical removal of particals by filtration and sedimentatin.
Different steps - Initially ,floating debrids of sewage water is removed by sequential filtration Then , grit (soil+ small pebbles ) is removed by sedimentation. The remaining solid particles, which have settld down, form the sludge while the supernatant forms the effluent .
Effluent is then taken for secondary tratment .