Water Treatment

Question 1

What is potable water

Answer 1

Water that is drinkable

Question 2

How water is treated to become drinkable

Answer 2

Filters from the twigs and sand

Sterilised from harmful bacteria and done so with chlorine bubbles passed through water or ultra violate light

Question 3

What do hot countries have to do to get drinkable water

Answer 3

Use sea water as not enough ground water
They use distillation to separate salt
And can be treated with membrane where it lets water pass through but not the salt

Question 4

How to test and distil water

Answer 4

Test ph between 6.5 and 8.5
Test for sodium chloride
Distil water by distillation
Retest ph

Question 5

Sewage treatment steps

Answer 5

Sewage water is screened ( removal of materials )
Then stands in a settlement tank and undergoes sedimentation
Air is pumped through water to encourage aerobic bacteria to break down organic matter
Sludge from bottom of tank is removed and transferred into large tanks to get broken down
Anaerobic reparation breaks down organic matter in sludge
For waste water containing toxic substances additional stages of treatment may involve adding chemicals