In a sludge tank, the gas mainly produced, is A. Oxygen B. Nitrogen C. Hydrogen D. Carbon dioxide

[amp_mcq option1=”Oxygen” option2=”Nitrogen” option3=”Hydrogen” option4=”Carbon dioxide” correct=”option4″]

The correct answer is D. Carbon dioxide.

Sludge tanks are used to store and treat wastewater sludge. The sludge is a mixture of organic matter, inorganic matter, and water. The organic matter in the sludge decomposes anaerobically, which produces carbon dioxide gas. The carbon dioxide gas is released into the atmosphere through the tank’s ventilation system.

Oxygen is not produced in sludge tanks because the environment is anaerobic. Nitrogen is not produced in sludge tanks because it is not a reactant in the anaerobic decomposition process. Hydrogen is not produced in sludge tanks because it is not a product of the anaerobic decomposition process.

Here is a more detailed explanation of each option:

• Option A: Oxygen is not produced in sludge tanks because the environment is anaerobic. Anaerobic decomposition is a type of decomposition that occurs in the absence of oxygen. In sludge tanks, the organic matter decomposes anaerobically, which produces carbon dioxide gas. The carbon dioxide gas is released into the atmosphere through the tank’s ventilation system.
• Option B: Nitrogen is not produced in sludge tanks because it is not a reactant in the anaerobic decomposition process. The reactants in the anaerobic decomposition process are organic matter and water. The products of the anaerobic decomposition process are carbon dioxide, methane, and other gases.
• Option C: Hydrogen is not produced in sludge tanks because it is not a product of the anaerobic decomposition process. The products of the anaerobic decomposition process are carbon dioxide, methane, and other gases. Hydrogen is not one of the products of the anaerobic decomposition process.
• Option D: Carbon dioxide is produced in sludge tanks because it is a product of the anaerobic decomposition process. The products of the anaerobic decomposition process are carbon dioxide, methane, and other gases. Carbon dioxide is one of the products of the anaerobic decomposition process.