Secondary Treatment

Q.

What are the differences between primary and secondary wastewater treatment?

Q.

Describe the working of a wastewater treatment plant. [5 MARKS]

Q.

Explain the function of bar screens in a wastewater treatment plant?

Q.

What is the function of skimmer in wastewater treatment plant?

1. It helps in aerobic bacteria to grow to decompose organic matter

2. It helps in removing floatable solids and liquids

3. It helps in removing large objects

4. All of the given options

Q.

What is the function of skimmer in waste water treatment plant?

1. It helps in aerobic bacteria to grow to decompose organic matter

2. It helps in removing floatable solids

3. It helps in dissolving impurities

4. It helps in removing large objects

Q. Which of the following describes the correct sequence for treatment of wastewater in a wastewater treatment plant?

1. Chemical → biological → physical
2. Biological → physical → chemical
3. Physical → biological → chemical
4. Biological → chemical → physical

Q. What is treitary treatment?

Q.

Three statements are provided here which define the terms – (a) sludge (b) sewage and (c) wastewater. Pick out the correct definition for each of these terms. ​

1. The settled solids that are removed in wastewater treatment with a scraper. ​

2. Water from kitchen used for washing dishes. ​

3. Wastewater released from homes, industries, hospitals and other public buildings.

Q.

Explain the formation of sludge during wastewater treatment.

Q. Which amongst the following is a part of secondary treatment of wastewater?

1. Screening
2. Chlorination
3. Aeration
4. Sludge formation

Q.

Fill in the blanks:​
(a) Cleaning of water is a process of removing ____________.

(b) Wastewater released by houses is called _________.

(c) Dried __________ is used as manure.

(d) Drains get blocked by _________ and _________.

Q. Describe various steps of cleaning wastewater in a wastewater treatment plant.

Q. Describe various steps of cleaning wastewater in a wastewater treatment plant.

Q. The bar screen machine in the wastewater treatment plant at Itarsi Madhya Pradesh suffered a mechanical breakdown. State how would it impact the process of cleansing the wastewater and affect the people of Itarsi. [3 MARKS]

Q. Water is aerated at which stage in a wastewater treatment plant?

1. Secondary treatment
2. Primary treatment
3. Wastewater reduction
4. Biochemical reduction

Q. Describe various steps of cleaning wastewater in a wastewater treatment plant.

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

Q. In which one of these is air blown onto the sewage?

(a) Grit chamber
(b) Aeration tanks
(c) Water tank
(d) Septic tank

Q. In a wastewater treatment plant, air is pumped into clarified water to:

1. Remove lighter impurities
2. Disinfect water
3. Support the growth of aerobic bacteria
4. Support the growth of anaerobic bacteria

Q. Which amongst the following is a part of secondary treatment of wastewater?

1. Screening
2. Chlorination
3. Aeration
4. Sludge formation

Q. Sludge formation is a part of _______ process in the wastewater treatment plant.

1. primary treatment
2. secondary treatment
3. screening
4. aeration

Q.

What happens during the aeration step of water treatment?

1. Amount of oxygen decreases

2. Amount of oxygen increases

3. Amount of chlorine decreases

4. Amount of chlorine increases

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

Q. Which amongst the following is a part of secondary treatment of wastewater?

1. Screening
2. Chlorination
3. Aeration
4. Sludge formation

Q. In a filtration plant, water is filtered using layers of

1. sand and clay
2. clay and fine gravel
3. sand and fine gravel
4. sand, fine gravel and medium gravel

Q. Sludge formation is a part of _______ process in the wastewater treatment plant.

1. primary treatment
2. secondary treatment
3. screening
4. aeration

Q. In the waste treatment plant (WWTP) air is pumped into the water to:

1. Support the growth of anaerobic bacteria
2. Support the growth of aerobic bacteria
3. Disinfect water
4. Blow human waste