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The gas from sludge digestion tank is mainly composed of

A. Nitrogen

B. Carbon dioxide

C. Hydrogen sulphide

D. Methane

Answer: Option D

Solution(By Examveda Team)

The gas from a sludge digestion tank is primarily composed of Methane. Sludge digestion is a process in environmental engineering where organic matter in sewage sludge is decomposed by microorganisms in an anaerobic environment, producing biogas as a byproduct. Biogas is mainly composed of methane, along with smaller amounts of carbon dioxide and traces of other gases such as hydrogen sulfide and nitrogen.

This Question Belongs to Civil Engineering >> Environmental Engineering

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Comments ( 2 )

  1. Dwaipayan Chakraborty
    Dwaipayan Chakraborty :
    1 month ago

    Why not Carbon Dioxide?

  2. Manju Vk
    Manju Vk :
    5 years ago

    Carbon dioxide

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