Question

Describe the steps that are involved on obtaining water from waste water. [5 MARKS]

Answer 1

Stepwise explanation:1 Mark each

• Waste water is shaken well and left to stand in the sun for some days.
• It is again stirred several times using an aerator or mechanical stirrer or a mixer to remove bad odour from water
• the stirred product is filtered and sediment is removed to form insoluble waste
• Chlorination is used to kill germs in the filtered water.
• Depending upon the usage,further process of filtration can be chosen, ultra violet radiation, ozonation or reverse osmosis treament