Question
Define the term sludge. Name two chemicals that are used to disinfect water? [2 MARKS]
Answer:
:
Definition: 1 Mark
Each Disinfectant: 0.5 Marks
When wastewater is allowed to settle in a large tank, solids like faecessettle at the bottom of the tank. The solid waste at the bottom of the tank is known as sludge.
Two chemicals that are used to disinfect water are:
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:
Definition: 1 Mark
Each Disinfectant: 0.5 Marks
When wastewater is allowed to settle in a large tank, solids like faecessettle at the bottom of the tank. The solid waste at the bottom of the tank is known as sludge.
Two chemicals that are used to disinfect water are:
- Ozone
- Chlorine
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