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Question
Which of the following describes the correct sequence for treatment of wastewater in a wastewater treatment plant?
Which of the following describes the correct sequence for treatment of wastewater in a wastewater treatment plant?
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Solution
The correct option is C Physical → biological → chemical
Wastewater treatment is the process of removing harmful contaminants from water. Physical, chemical and biological processes are used to treat wastewater.
- Wastewater treatment starts with screening and is followed by removal of sand and grit which are physical processes.
- It is then followed by biological processes where wastes in water are decomposed by bacteria.
- Finally, it is treated with chemicals like chlorine and ozone to disinfect the water before it is released into natural waterbodies.
- Hence, correct sequence for treatment of wastewater in a wastewater treatment plant is physical, biological and then chemical.
Wastewater treatment is the process of removing harmful contaminants from water. Physical, chemical and biological processes are used to treat wastewater.
- Wastewater treatment starts with screening and is followed by removal of sand and grit which are physical processes.
- It is then followed by biological processes where wastes in water are decomposed by bacteria.
- Finally, it is treated with chemicals like chlorine and ozone to disinfect the water before it is released into natural waterbodies.
- Hence, correct sequence for treatment of wastewater in a wastewater treatment plant is physical, biological and then chemical.
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