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  • What gases are produced in anaerobic sludge digesters?Option: 1 Methane and CO2 onlyOption:

What gases are produced in anaerobic sludge digesters?

Option: 1

Methane and CO2 only


Option: 2

Methane, Hydrogen Sulphide and CO2


Option: 3

Methane, Hydrogen Sulphide and O2


Option: 4

Hydrogen Sulphide and CO2


Answers (1)

best_answer
  • Anaerobic digestion, in which organic matter is broken down without oxygen, is demonstrated by the activated sludge digester.
  • The sewage effluent is pumped into a sludge-filled aeration or oxidation tank.
  • Algae and bacteria make up the sludge.
  • The fungal filaments and the rapidly multiplying bacteria in an aeration tank combine to form large flocs.
  • This is referred to as activated sludge because it flocculates sediment at the tank's bottom.
  • A portion of the activated sludge is pumped into an anaerobic sludge digester for anaerobic microbial decomposition and the production of biogas, while the remaining portion is used as an inoculum in an aeration tank.
  • In addition to hydrogen sulphide and carbon dioxide, biogas also contains 70% methane, which is produced by anaerobic bacteria on animal waste.

Hence, the correct answer is option 2).

Posted by

Ritika Kankaria

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