In normal conditions, the period for sludge digestion, is A. 10 days B. 20 days C. 30 days D. 60 days

The correct answer is C. 30 days.

Sludge digestion is a process of anaerobic decomposition of organic matter in sludge. The process is carried out by a consortium of microorganisms, including bacteria, fungi, and protozoa. The microorganisms break down the organic matter into simpler compounds, such as carbon dioxide, methane, and water.

The rate of sludge digestion depends on a number of factors, including the temperature, pH, and the type of sludge. In normal conditions, the

448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube