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Study the following statements and selec...

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 is a sewage treatment plant is a rich source of aerobic bacteria.
(iv) Biogas, commonly called as gobar gas is pure methane.

A

(i) and (ii)

B

(ii) and (iv)

C

(ii) and (iii)

D

(ii) and (iv)

Text Solution

Verified by Experts

The correct Answer is:
B
The stage in which biologial treatement of sewage is done is called secondary treatement. Biogas is mixture of gasses containing predominathly methane produced by micoorganism. Which may be used as fuel type of gas produced deopends on microbes and the organic substrae they utlize. Here the raw material is cellulose ahnd the gases produced are methane along with `CO_(2)` and `H_(2)`
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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.

Physical removal of large and small particle from the sewage through filtration and sedimentation is called

The step which incolves removal of small and large particles through giltration and sedimentation. I. Primary treatement II. Secondary treatment III. Biological treatment IV. Tertiary treatment

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

Read the following statements and select the incorrect one. (i) In reparative regeneration several body parts can develop e.g. broken tail of wall lizard. (ii) Fragmentation occurs in algae and bryophytes only. (iii) Exogenous budding occurs in certain annelids and urochordates. (iv) A small shoot of plant with superior characters is called scion or graft.

Given below are the steps involved in sewage treatment. Arrange them in proper sequence and select the correct option. A. Passage of primary effluent into large aeration tanks for mechanical agitation and pumping of air. B. Passage of secondary effluent and formation of activated sludge. C. Physical removal of particles through filtration and sedimentation D. Release of effluent from the secondary treatment plant into natural water bodies. E. Growth of useful aerobic microbes into flocs which significantly reduce the BOD.

Select the correct sequence of events in a sewage treatment process. A. Passages of primary effluent into large aeration tanks for mechanical agitation and pumping or air . B. Passage of effluent into the settings tank and formation of activated sludge. C. Physical removal of particles thought filtration and sedimentation . D. Release of effluent from the secondary temperature plant into natural water bodies. E. Growth of useful aerobic microbes into flocs which significantly reduce the BOD.

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.

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 required aeration"),((iv)"A lot of decomposition occurs during formation of primary sludge","Very little decomposition occurs during formation of activated sludge"):}

ERRORLESS -MICROBES IN HUMAN WELFARE-Microbes In Human Welfare
  1. In the sewage treatement, bacterial flocs are allowed to sediment iin ...

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  2. Refer the given flowchart sewage treatment, accordingly mathc Column I...

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  3. Study the following statements and select the incorrect ones (i) Ph...

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  4. Integrated Pest Manaement (IPM) discourges the excessive use of

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  5. The large vessels for growing microbnes on an industrial scale are cal...

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  6. The primary treatment of sewage involes

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  7. The amount of oxygen required by the microbes in the decompositionn of...

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  8. During which stage of sewage treatment micrones are used

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  9. The solids which settel after primary treatment of sewage are called

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  10. What gases are produced in anaerobic sludge digestres

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  11. Flocs' refer to

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  12. A sewage treatement process, in which a part of decomposer bacteria pr...

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  13. The purpose of biological treatement of water -water is to

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  14. Which of the following in sewage treatement removes suspended solids.

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

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  16. Wastewater treatment geneerates a large quantity of sludge, which can ...

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

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  18. Match the following list of bioactive substance and their roles {:(,...

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  19. Big holes in Swiss cheese are made by a

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

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