What is the water obtained after the sedimentation process in sewage treatment called?

In the first stage of sewage treatment,physical particle matter is removed by which process?

Identify the sequence of processes in sewage treatment:

What is the correct sequence of processes in a sewage treatment plant?

Select the appropriate option regarding the aeration tank.

Select the correct sequence with respect to sewage treatment.
$i$. Removal of suspended solid particles by primary treatment.
$ii$. Wastewater screening
$iii$. Anaerobic bacteria digest activated sludge.
$iv$. Treatment by flocs in aeration tank.
$v$. Grit settling