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During which stage of sewage treatment microbes are used

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Important Questions on Microbes in Human Welfare

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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>Ordinary Thinking>Q 9
The solids that settle after primary treatment of sewage are called
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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>Ordinary Thinking>Q 10
What gases are produced in anaerobic sludge digesters?
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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>Ordinary Thinking>Q 11

'Flocs' refer to:

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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>Ordinary Thinking>Q 12

A sewage treatment process in which a part of decomposer bacteria present in the wastes is recycled into the starting of the process is called as

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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>Ordinary Thinking>Q 13
The purpose of biological treatment of waste-water is to
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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>Ordinary Thinking>Q 14
Which of the following in sewage treatment removes suspended solids
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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>NCERT>Q 1
Activated sludge should have the ability to settle quickly so that it can 
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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>NCERT>Q 2
Wastewater treatment generates a large quantity of sludge, which can be treated by