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Removal of large pieces of floating debr...

Removal of large pieces of floating debris . oily substances , etc , during sewage treatment called ……………

A

Primary treatment

B

Secondary treatment

C

Final treatment

D

Amplification

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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.

During carbon reduction process, an additional substance added to get rid of the impurities is called …………

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.

Substance used during smelting to remove gangue in the form of slag, is called …………..

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.

Which of the following sewage treatment removes suspended solids?

Select the correct statement regarding activated sludge formed during secondary sewage treatment.

Fill up the blanks by selecting the correct option. (i) Biogas is a mixture of gases which predominantly contains______and is used as_______ (ii) Methanogens are commonly found in the__________during sewage treatment. (iii) ___________species are free-living fungi and effective biocontrol agents of several plant pathogens.

SHARAM PUBLICATION-BIOLOGY AND HUMAN WELFARE (MICROBES IN HUMAN WELFARE)-EXERCISE
  1. Which one is not heterotrophic nitrogen fixer

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  2. Which nitrogen fixing bacteria does association with root system of le...

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  3. Removal of large pieces of floating debris . oily substances , etc , d...

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  4. Most commonly used substance for industrial production of beer is

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  5. The vitamin whose content increases following the conversion of milk i...

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  6. BOD of waste water is estimated by measuring the amount of :

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  7. Correct the statements by changing underlined words only : Majority ...

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  8. Correct the statements by changing bracketed words only : (Lactobaci...

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  9. Correct the statements by changing bracketed words only : Production...

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  10. Correct the statements by changing bracketed words only : (Steriliza...

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  11. Correct the statements by changing bracketed words only : First anti...

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  12. Correct the statements by changing underlined words only : CO2 is us...

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  13. Correct the statements by changing underlined words only : CO2 provi...

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  14. Correct the statements by changing underlined words only : Methyl al...

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  15. Correct the statements by changing underlined words only : Pectinase...

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  16. Correct the statements by changing underlined words only : In primar...

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  17. Correct the statements by changing underlined words only : Biomass o...

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  18. Correct the statements by changing underlined words only : Pectinase...

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  19. Correct the statements by changing underlined words only : In biogas...

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  20. Correct the statements by changing underlined words only : Methanoge...

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