Sludge

Q. What is sludge? Explain how it is treated.

Q.

Question 21

Three statements are provided here which define the terms, i.e. sludge, sewage and wastewater. Pick out the correct definition for each of these terms.
(a) The settled solids that are removed in wastewater treatment with a scraper.
(b) Water from kitchen used for washing dishes.
(c) Wastewater released from homes, industries, hospitals and other public buildings.

Q. What is sludge? Choose the correct option.

1. Clay mixed with water that is used by the potter to make earthen pots.
2. Semisolids that settle down during wastewater treatment.
3. Industrial waste that is released in the rivers.
4. Human excreta which mixes with water.

Q.

The suspended microbes in a water treatment plant settle at the bottom and the water is removed from the _______.

1. bottom

2. top and bottom

3. top

4. middle​

Q.

Which of the following is put into anaerobic sludge digester for further sewage treatment?

1. Effluents of primary treatment

2. Activated sludge

3. Primary sludge

4. Floating debris

Q.

What are the byproducts of wastewater? Do they have any commercial value? [2 MARKS]

Q.

Question 3

Which of the following is/are products of wastewater treatment?
(a) Biogas
(b) Sludge
(c) Both biogas and sludge
(d) Aerator

Q.

Once wastewater is slowed down, it is let into large settlement tanks. Which of the following contaminants are removed as sludge in this process? (You may choose more than one option).

1. Small plastics

2. Human excreta

3. Large suspended solids

4. Bacteria

Q. What is sludge? Explain how it is treated.

Q. What is sludge? Explain how it is treated.

Q.

Which Nonmetal Is Used To Disinfect Water?

Q. What happens to the sludge produced after wastewater passes through the sewage treatment plant?

Q.

Question 5
What is sludge? Explain how it is treated.

Q.

What is sludge? Explain how it is treated.

Q. Sludge is made up of matter. On decomposition, it produces .

1. organic
2. inorganic
3. oxygen
4. biogas

Q. Sludge is made up of matter. On decomposition, it produces .

1. oxygen
2. organic
3. biogas
4. inorganic

Q.

Which among the following are the by-products of wastewater treatment?

1. Carbon dioxide and ozone

2. Carbon monoxide and sludge

3. Biogas and sludge

4. Biogas and ozone

Q. Sludge is made up of matter. On decomposition, it produces .