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Types of Settling in Sedimentation

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Questions and Answers

What is the moisture content in dewatered sludge, according to the text?

10 percent
70 percent (correct)
50 percent
90 percent

Why is sludge not spread on land where crops are grown for human consumption?

It may contain toxic industrial chemicals (correct)
It contains inert ash
It evaporates the moisture completely
It behaves as a liquid

What process converts organic solids in sludge into inert ash?

Dewatering
Incineration (correct)
Spreading on agricultural land
Burying in landfill

Why is air pollution control crucial when sewage sludge is incinerated?

To prevent harmful emissions (B) Signup and view all the answers

Where may sludge be disposed of if a suitable site for land disposal is not available?

Incinerated (A) Signup and view all the answers

What is the primary purpose of thickening in sludge treatment?

To reduce the total mass of solids in the sludge (C) Signup and view all the answers

Why is digestion an important step in sludge treatment?

To transform organic solids into stable substances and destroy pathogens (B) Signup and view all the answers

Which method helps in reducing pollution and public health risks associated with sludge disposal?

Dewatering (C) Signup and view all the answers

How does proper sludge treatment benefit local communities according to the text?

By enhancing job opportunities in eco-tourism (B) Signup and view all the answers

What is the ultimate goal of sludge treatment and disposal processes?

To prevent environmental pollution and public health risks (A) Signup and view all the answers