Water Treatment Flashcards
1
Q
How is fresh water turned into potable water?
A
- from a source of water like a river. Pass through filter beds, sterilise with UV light to kill microbes.
2
Q
What is done to the solid sewage sludge in waste water treatment?
A
It is anaerobically digested
3
Q
What is done to the liquid effluent in waste water treatment?
A
It is biologically aerobically treated.
4
Q
4 stages of water treatment
A
1) screened ( removal of large bits like grit)
2) settlement tank (solids sink, effluent rises)
3) effluent treated with aerobic digestion (air pumped in to remove bacteria)
4) sunken solids anaerobically digested into large tanks.
5
Q
Name 3 sterilising agents
A
Ozone , chlorine or UV light
