Question

Which of the following operational problems relate to the functioning of rapid
sand filter?
1. Inadequate media comprising bed
2. Sludge Bulking
3. Mud ball formation
4. Negative head
5. Incrustation of media

1) 1, 3, 4 and 5 only
2) 1, 2, 3 and 4 only
3) 2, 3, 4 and 5 only
4) 1, 3, 4 and 5​

Answer 1

Answer:

1,3,4 and 5 negative head

Answer 2

1,3,4,5 are negative