Q. No.Methane, Hydrogen sulfide and carbon dioxide are produced in
(1) Aerobic settling tanks
(2) Anaerobic sludge digesters
(3) Aeration tanks
(4) Primary settling tanks
(1) Aerobic settling tanks
(2) Anaerobic sludge digesters
(3) Aeration tanks
(4) Primary settling tanks
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
Biogas is used as source of energy because it is
(1) Easy to produce
(2) Inflammable
(3) Reactive
(4) Very light
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
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
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
Bacteria growing anaerobically on cellulosic material, produce
(1) Only Carbon-dioxide
(2) Carbon-dioxide, Methane and Hydrogen
(3) Methane
(4) Methane and Hydrogen
Methanogens are commonly found in
(1) Aerobic sludge
(2) Anaerobic sludge
(3) Flocs
(4) Mixotrophic sludge
Methanogens are found in which organ of cattle?
(1) Rumen
(2) A part of stomach
(3) Both A and B
(4) Intestine
The nutrition of cattle is taken care by which of the following microbes?
(1) Methanogens
(2) Halophiles
(3) Cynobacteria
(4) Thermoacidophiles
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