using resources

Question 1

what is sustainability

Answer 1

using materials in a way that does not compromise future generation

Question 2

what is potable water

Answer 2

wate that has low enough levels of dissolved salts and microbes that is safe to drink

Question 3

how is water treated

Answer 3

water is passed through water beds where it is filtered to remove large insoluble particles
then it is sterilised using chlorine, ozone or uv

Question 4

what is desalination

Answer 4

removal of salt by distillation or reverse osmosis so water is safe to drink

Question 5

whats a disadvantage of desalination

Answer 5

requires a lot of energy

Question 6

how do we treat waste water

Answer 6

ws=aste water goes through screening and grit removal to remove large particle s
it then goes through sedimentation where it is turned into sludge to remove organic matter and liquid effluent to reduce solid waste

Question 7

how is sludge treated

Answer 7

anerobic digestion
Using a specific bacteria
To remove organic matter

Question 8

how is effluent treated

Answer 8

aerobic respiration to reduce solid waste

Question 9

what is Phyto mining

Answer 9

plants absorb copper ions into roots
they are then burned and then copper is obtained

Question 10

what is bioleaching

Answer 10

bacteria produce leachate solutions that contain copper ions which can be extracted by electrolysis or displacement

Question 11

Similarities between treatment Ts of fresh water and waste water

Answer 11

Both sterilised to kill bacteria