From secondary settling tanks what is used as inoculum for primary settling tanks?

(1) Activated sludge

(2) Anaerobic bacteria

(3) Fungal Filaments

(4) Biogas

Subtopic:  Microbes in Sewage Treatment |
 87%
From NCERT
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In anaerobic sludge digesters, the anaerobic bacteria

(1) Digest Fungi

(2) Digest Bacteria

(3) Both A and B

(4) Digest the organic matter

Subtopic:  Microbes in Sewage Treatment |
 71%
From NCERT
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Methane, Hydrogen sulfide and carbon dioxide are produced in

(1) Aerobic settling tanks

(2) Anaerobic sludge digesters

(3) Aeration tanks

(4) Primary settling tanks

Subtopic:  Microbes in Sewage Treatment |
 92%
From NCERT
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Which of the following is released into natural water bodies like rivers and streams?

(1) Effluent of primary treatment

(2) Effluent of secondary treatment

(3) Settling component of secondary treatment

(4) Settling component of primary treatment

Subtopic:  Microbes in Sewage Treatment |
 81%
From NCERT
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Biogas is used as source of energy because it is

(1) Easy to produce

(2) Inflammable

(3) Reactive

(4) Very light

Subtopic:  Microbes in Production of Biogas |
 80%
From NCERT
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Ganga Action Plan and Yamuna Action Plan are initiated by

(1) Ministry of Environment and Forest

(2) Ministry of Environment

(3) Ministry of Water bodies

(4) Ministry of Forest

Subtopic:  Microbes in Sewage Treatment |
 83%
From NCERT
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Which of the following is not correct with respect to biogas?

(1) Contains predominantly Methane

(2) Produced by microbial activity

(3) May be used as fuel

(4) Not inflammable

Subtopic:  Microbes in Production of Biogas |
 92%
From NCERT
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The type of the gas produced as the end product of growth and metabolism by microbes depend on

(1) Microbes

(2) Type of organic substrate they utilize

(3) Type of inorganic salts taken by them

(4) Both A and B

Subtopic:  Microbes in Production of Biogas |
 88%
From NCERT
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Bacteria growing anaerobically on cellulosic material, produce

(1) Only Carbon-dioxide

(2) Carbon-dioxide, Methane and Hydrogen

(3) Methane

(4) Methane and Hydrogen

Subtopic:  Microbes in Production of Biogas |
 90%
From NCERT
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Methanogens are commonly found in

(1) Aerobic sludge

(2) Anaerobic sludge

(3) Flocs

(4) Mixotrophic sludge

Subtopic:  Microbes in Production of Biogas |
 94%
From NCERT
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