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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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Important Questions on Microbes in Human Welfare

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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
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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>NCERT>Q 6
BOD of wastewater is estimated by measuring the amount of
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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 8

What would happen if oxygen availability to activated sludge flocs is reduced?

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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>Critical Thinking>Q 4
The fruit juices turn bitter in taste if they are kept in open place for sometime, because of:-
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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>Critical Thinking>Q 5
Which one of the following pairs is wrongly matched?
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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>Critical Thinking>Q 6
After Karyogamy followed by meiosis. Spores are produced exogenously in
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NTA Errorless Biology Volume-2>Chapter 13 - Microbes in Human Welfare>Assertion & Reason>Q 1
Assertion: Yeasts such as Saccharomyces cerevisiae are used in the baking industry.

Reason: Carbon dioxide produced during fermentation causes bread to rise by thermal expansion.