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Questions and Answers
What is the primary purpose of passing water through a sand filter?
What is the primary purpose of passing water through a sand filter?
- To add chlorine to the water
- To introduce beneficial bacteria
- To remove particulate matter (correct)
- To increase the water's oxygen levels
Which of the following is a method of disinfecting sewage?
Which of the following is a method of disinfecting sewage?
- Adding bacteria to the water
- Treating the water with oxygen
- Boiling the water
- Sand filtration (correct)
What is the effect of chlorine treatment on sewage?
What is the effect of chlorine treatment on sewage?
- It increases the amount of particulate matter in the water
- It changes the color of the water
- It is very effective in disinfecting the sewage (correct)
- It reduces the oxygen levels in the water
What is removed from the water during sand filtration?
What is removed from the water during sand filtration?
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Why is chlorine treatment effective in disinfecting sewage?
Why is chlorine treatment effective in disinfecting sewage?
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Study Notes
Oil Spills
- Large oil spills have occurred in recent years, including the 2010 spill in the Gulf of Mexico.
Wastewater Treatment
- Wastewater is used water from various sources, including toilets, showers, baths, kitchen sinks, laundries, and industrial processes.
Primary Treatment
- Primary treatment removes large layers of waste, leaving a remaining liquid that can be sent to secondary treatment.
Secondary Treatment
- Secondary treatment removes more than 90% of suspended solids.
Tertiary Treatment (Effluent Polishing)
- Tertiary treatment is used to further clean water before discharging it into a sensitive ecosystem.
- Methods used in tertiary treatment include:
- Sand filtration to remove particulate matter
- Chlorine treatment, which is effective in disinfecting sewage
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Description
This quiz assesses your understanding of the environmental consequences of underwater oil drilling, including the impact of oil spills on marine ecosystems.
