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Activated sludge should have the ability...

Activated sludge should have the ability to settle quickly so that it can

A

be rapidly pumped back from sedimen- tation tank to aeration tank

B

absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank

C

be discarded & anaerobically digested

D

absorb colloidal organic matter

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The correct Answer is:
a
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TRUEMAN BIOLOGY-NCERT Exemplar Questions +2 (MICROBES IN HUMAN WELFARE)-MCQs
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  2. Wastewater treatment generates a large quantity of sludge, which can b...

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  3. Methanogenic bacteria are not found in

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  4. Match the following list of bacteria and their commercially important ...

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  5. Match the following list of bioactive substances and their roles Cho...

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  6. The primary treatment of waste water in- volves the removal of

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  7. BOD of waste water is estimated by measuring the amount of

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  8. Which one of the following alcoholic drinks is produced without distil...

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  9. The technology of biogas production from cow dung was developed in ind...

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  10. The free-living fungus Trichoderma can be used for

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  11. What would happen if oxygen availability to activated sludge flocs is ...

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  12. Mycorrhiza does not help the host plant in

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  13. Which one of the following is not a nitrogen-fixing organism ?

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  14. Big holes in Swiss cheese are made by a

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  15. The residue left after methane production from cattle dung is

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  16. Methanogens do not produce

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  17. Activated sludge should have the ability to settle quickly so that it ...

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  18. Match the items in Column 'A' and Column 'B' and choose correct answer...

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  19. Which one is the most important role of microorganism of the well bein...

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