Potable Water

Question 1

What is potable water?

Answer 1

Clean, drinkable water

Question 2

Why is there a growing demand for potable water?

Answer 2

1. Increasing pop

2. Water availability threatened by clim change

Question 3

What are the sources of potable water?

Answer 3

1. Groundwater
2. Seawater
3. Waste water

Question 4

What are the 5 stages of wastewater treatment?

Answer 4

1. SCREENING
   - remove large solids
2. SETTLEMENT
   - remaining solids settle to bottom of tank
3. AERATION AND BIOLOGICAL TREATMENT

• bacteria break down organic matter.
• aeration provides o2 for bacteria

4. Chlorination
   - chlorine tabs kill microorganisms and pathogens
5. FINAL SETTLEMENT

• fine particles settle to bottom of tank.
• water than filtered again

Question 5

What are the stages of sea water treatment?

Answer 5

1. Desalination
2. Chlorination
   - chlorine tabs kill microorganisms and pathogens
3. water is forced thru super-fine membrane - salt does not pass thru

Question 6

What are the advantages of chlorination?

Answer 6

Untreated water can contain microorganism that can cause diseases like cholera, dysentery and typhoid

Question 7

What are the disadvantages of chlorination?

Answer 7

Chlorine gas is toxic - irritate eyes, skin and respiratory + toxic to aquatic organisms