Waste Water Treatment Flashcards
1
Q
What are the three sources of waste water?
A
- Domestic
- Agricultural
- Industrial
2
Q
What is stage 1 of waste water treatment?
A
Filtering/screening
Grit removal
— (removes solids)
3
Q
What is stage 2 of waste water treatment?
A
Sedimentation (organic waste sinks to the bottom)
- produces sewage sludge and effluent
4
Q
How is sludge treated?
A
Anaerobic (bacteria) digestion of sludge
- reduces volume
5
Q
How is effluent treated?
A
Aerobic treatment
- air passed through
- aerobic bacteria removes harmful microbes
6
Q
What happens to the treated effluent?
A
Returned back to environment
- released into rivers/sea
