Primary Treatment Flashcards
1
Q
Objectives
A
To remove the large solids which remain suspended in the wastewater and the oxygen-demanding substances
2
Q
Types
A
Bar racks (screening)
Grit Chambers
Communitors
Equalisation
3
Q
Settling tank characteristics
A
Hydraulic detention time: 3-4hours
Surface loading rate: 25-60 L/day/m2
Usual Depth: 3-5m
Efficiency - 50/60% of SS and 30-35% of BOD5
