Here are 10 One-Word Answer Type Questions from the subtopic “Wastewater Treatment Plant (WWTP)” along with their answers and explanations after each question:
1)
Question: What is the first step in a wastewater treatment plant to remove large objects?
Answer: Screening
Explanation: Screening is the process where bar screens remove large objects like rags, sticks, cans, and napkins from wastewater to prevent blockage of pipes.
2)
Question: What is the name of the solid waste settled at the bottom of the settling tank?
Answer: Sludge
Explanation: Sludge is the solid waste like faeces that settles down at the bottom of the settling tank during primary treatment of sewage.
3)
Question: What is the process of adding air to wastewater called?
Answer: Aeration
Explanation: Aeration is the process where air is pumped into clarified water to promote the growth of aerobic bacteria which consume the organic waste.
4)
Question: What is the term for the bacteria that break down sludge without using oxygen?
Answer: Anaerobic
Explanation: Anaerobic bacteria decompose sludge in the absence of oxygen, producing biogas as a by-product.
5)
Question: What is the clear water obtained after removing sludge and floatable solids called?
Answer: Clarified
Explanation: After settling and removing the sludge, the remaining clear water is called clarified water which is further treated.
6)
Question: Name the gas produced during anaerobic decomposition of sludge.
Answer: Biogas
Explanation: Biogas is produced when anaerobic bacteria decompose the sludge. It can be used as fuel or to generate electricity.
7)
Question: What is used in the final step of wastewater treatment to kill harmful microbes?
Answer: Chlorine
Explanation: Disinfection is done using chlorine or ozone to kill harmful microbes before the treated water is discharged.
8)
Question: What is removed in the grit and sand removal tank of WWTP?
Answer: Pebbles
Explanation: Pebbles, sand, and grit are removed in this tank by slowing down the speed of wastewater to allow these heavy particles to settle.
9)
Question: What is the water that is discharged from the treatment plant called?
Answer: Effluent
Explanation: Effluent is the treated water released into rivers, seas, or used for irrigation after proper treatment.
10)
Question: What is used to dry sludge after decomposition?
Answer: Beds
Explanation: Sand drying beds or machines are used to remove water from the sludge, making it dry and suitable to be used as manure.
If you want, I can now prepare a complete worksheet of all these topics together for easy learning and practice.
Shall I do that?
