Civil Engineering - Waste Water Engineering - Discussion

Discussion Forum : Waste Water Engineering - Section 7 (Q.No. 20)
20.
In a sludge tank, the gas mainly produced, is
Oxygen
Nitrogen
Hydrogen
Carbon dioxide
Methane.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
17 comments Page 2 of 2.

Chintu said:   7 years ago
In the second stage of digestion, known as the period of intensive digestion, stabilization and gasification, the more resistant nitrogenous materials, such as the proteins, amino-acids and others, are attacked. The pH value must be maintained from 6.8 to 7.4.

Large volumes of gases with a 65 or higher percentage of methane are produced. Methane is an odourless, highly inflammable gas which can be used as a fuel. The organisms which convert organic acids to methane and carbon dioxide gases are called methane formers. The solids remaining are relatively stable or only slowly putrescible, can be disposed of without creating objectionable conditions and have value in agriculture.

Chaithu said:   7 years ago
Methane 75%, carbon dioxide 25%.

ANUBHAV said:   8 years ago
METHANE is the correct answer.

Soumik said:   8 years ago
Methane is 75% extracted.

Shampy A.e.n said:   8 years ago
Yes, it's methane.

Arpita said:   8 years ago
I think the answer is methane.

Coolbibz said:   8 years ago
Shouldn't this be Methane? I'm confused. Someone please clarify.


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