- 1(current)
Q. No.Waste water treatment generates a large quantity of sludge, which can be treated by
1. anaerobic digesters
2. floc
3. chemicals
4. oxidation pond
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMethanogenic bacteria are not found in
1. rumen of cattle
2. gobar gas plant
3. bottom of water-logged paddy fields
4. activated sludge
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe primary treatment of waste water involves the removal of
1. dissolved impurities
2. stable particles
3. toxic substances
4. harmful bacteria
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyBOD of waste water is estimated by measuring the amount of
1. total organic matter
2. biodegradable organic matter
3. oxygen evolution
4. oxygen consumption
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat would happen if oxygen availability to activated sludge flocs is reduced?
| 1. | It will slow down the rate of degradation of organic matter. |
| 2. | The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs. |
| 3. | Floes would increase in size as anaerobic bacteria would grow around floes. |
| 4. | Protozoa would grow in large numbers. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyActivated sludge should have the ability to settle quickly so that it can
| 1. | be rapidly pumped back from the sedimentation tank to the aeration tank |
| 2. | absorb pathogenic bacteria present in wastewater while sinking to the bottom of the settling tank |
| 3. | be discarded and anaerobically digested |
| 4. | absorb colloidal organic matter |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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