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Questions and Answers
What is the primary treatment process for wastewater?
What is the primary treatment process for wastewater?
- Sedimentation
- Flotation
- Screening (correct)
- Aerobic biological treatment
What is the purpose of flotation in wastewater treatment?
What is the purpose of flotation in wastewater treatment?
- To remove suspended impurities
- To allow the water to stand undisturbed
- To clarify wastewaters by the removal of suspended matter (correct)
- To pass the wastewater through a mixed or a moving bar screen
What are the two types of secondary treatment processes?
What are the two types of secondary treatment processes?
- Aerobic biological treatment and Flotation
- Screening and Sedimentation
- Comminutor and Grid chamber
- Aerobic biological treatment and Anaerobic biological treatment (correct)
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Study Notes
- Primary treatment removes suspended impurities from wastewater by passing it through a mixed or a moving bar screen followed by the comminutor and then the resulting water enters the grid chamber where the grids are disposed.
- Screening removes suspended impurities by passing the wastewater through a mixed or a moving bar screen followed by the comminutor and then the resulting water enters the grid chamber where the grids are disposed.
- Sedimentation allows the water to stand undisturbed in high tanks at about 5m deep under the force of gravity.
- Flotation clarifies wastewaters by the removal of suspended matter such as oil or solids.
- Secondary treatment processes include: Aerobic biological treatment and Anaerobic biological treatment.
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