Potable Water Flashcards
1
Q
What are the 3 steps of making water potable form ground?
A
Choose a source of fresh water
Filter out solids
Sterilise to kill bacteria
2
Q
What is the extra step in making salty water potable?
A
Distillation
Reverse osmosis (requires a lot of energy)
3
Q
What are the 5 steps for treating waste water?
A
Screening and removal of grit and other solids
Sedimentation to produce sewage sludge and effluent
Anaerobic digestion of sewage sludge (to remove harmful microorganisms)
Aerobic biological treatment of effluent (bacteria feeds of harmful microorganisms
Sterilisation
4
Q
What are uses of sewage sludge?
A
Fertilisers and renewable energy source
