railway RRB JE (CBT I + CBT II) Mock Test 2024 Environmental Engineering Water Treatment Coagulation and Flocculation
In a water treatment, the optimum time of flocculation is usually given as 30 minutes. In case the time of flocculation is increased beyond this value, the flocs will
1
become heavy and settle down in the flocculation tank itself
2
Entrap air and will float in the sedimentation tank
3
Break up and defeat the purpose of flocculation
4
Stick to the paddles