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Preview questions
1. What is wastewater?
Water that is clean and pure · Water that has been used and contaminated · Water from rivers and lakes · Water that is stored for drinking
2. Which of the following is a source of wastewater?
Rainwater · Industrial processes · Groundwater · Freshwater lakes
3. What is the first step in the treatment of wastewater?
Chlorination · Sedimentation · Filtration · Collection
4. What process is used to remove solid particles from wastewater?
Evaporation · Filtration · Sedimentation · Chlorination
5. What is the role of bacteria in wastewater treatment?
To make water dirty · To consume organic matter · To filter out solids · To add chemicals
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