Removal of large pieces of floating debr...

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

Primary treatment

Secondary treatment

Final treatment

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.

USHA PUBLICATION-MICROBES IN HUMAN WELFARE-EXERCISE

Which of the following vitamins are water soluble ?
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The antibiotic Streptomycin is obtained from
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Removal of large pieces of floating debris . oily substances , etc , d...
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During biogas production , species used to bring about anaerobic diges...
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The micro organisms used to produce enzyme pectinase is
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Which one of the following is free living bacterial biofertilizer ?
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Which of the following is not an advantage of biogas ?
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Most commonly used substance for industrial production of beer is
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The vitamin whose content increases following the conversion of milk i...
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Wastewater treatment generates a large quantity of sludge , which can ...
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Methanogemc bacteria are not found in :
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The primary treatment of waste water involves the removal of :
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BOD of waste water is estimated by measuring the amount of :
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Which one of the following alcoholic drinks is produced without distil...
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The technology of biogas production from cow dung was developed in Ind...
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The free - living fungus Trichoderma can be used for :
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What would happen if oxygen availability to activated sludges flocs is...
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Mycorrhiza does not help the host plant in:
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Which one of the following is not a nitrogen - fixing organism ?
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Big holes in Swiss cheese are made by a :
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