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Secondary sewage treatment is mainly a:...

Secondary sewage treatment is mainly a:

A

Physical process

B

Mechanical process

C

Chemical process

D

BOTlogical process

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The correct Answer is:
D
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Explore conceptually related problems

Study the following statements and select the incorrect ones. (i) Physical removal of large and small particles through filtration and sedimentation is called primary sewage treatment. (ii) Secondary sewage treatment is mainly a mechanical process. (iii) Activated sludge sediment in a sewage treatment plant is a rich source of aeroic bacteria. (iv) Biogas, commonly called as gobar gas, is pure methane.

What is the key difference between primary and secondary sewage treatment ?

DISTINGUISH BETWEEN : Primary and secondary sewage treatment

Why do we prefer to call secondary waste water treatment as biological treatment ?

Study the given differences between primary sludge and activated sludge and select the incorrect ones. Primary Sludge Activated sludge (i) It is sludge formed during primary sewage treatment. It is sludge formed during secondary sewage treatment. (ii) It possesses flocs of decomposer microbes. It does not possess flocs of decomposer microbes. (iii) It does not require aeration. Formation of activated sludge requires aeration. (iv) A lot of decomposition occurs during formation of primary sludge. Very little decomposition occurs during formation of activated sludge.

Assertion : Secondary treatement of sewage is also called biological treatment while primary treatment is called physical treatment. Reason : Primary sewage treatment depends only upon sedimentation properties of materials present in sewage and filtration.

Guttation is mainly due to:

MODERN PUBLICATION-MICROBES IN HUMAN WELFARE-EXERCISE
  1. The neem is used as a natural insecticide because:

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  2. Which one of the following helps in absorption of phosphorus from soil...

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  3. Secondary sewage treatment is mainly a:

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  4. Which of the following is mainly produced by the activity of anaerobic...

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  5. An organism used as a biofertilizer for raising soyabean crop is:

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  6. The most common substrate used in distilleries for the production of e...

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  7. Ethanol is commercially produced through a particular species of:

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  8. A prokaryotic autotrophic nitrogen fixing symbiont is found in:

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  9. Which one of the following is not a biofertilizer ?

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  10. Continuous addition of sugars in 'fed batch' fermentation is done to:

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  11. The 'clot buster' produced by Streptococcus and modified by genetic en...

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  12. During sewage treatment, biogases are produced which include:

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  13. A good producer of citric acid is

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  14. What gases are produced in anaerobic sludges digesters ?

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  15. Which organisms convert milk into curd ?

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  16. Name the microorganisms that cause ripening of Roquefort cheese.

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  17. Name the mould that produces antibiotic penicillin.

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  18. Who were awarded noble prize in 1945 for penicillin discovery ?

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  19. Which microbe produce citric acid ?

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  20. Which bacteria produce acetic acid ?

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