Question

If primary sludge is sent directly to an anaerobic digester, what percentage of the total solids concentration do you want it to be before being pumped?

A) 10%
B) 20%
C) 30%
D) 40%
E) 50%

Answer 1

The percentage of total solids concentration for primary sludge before being pumped to an anaerobic digester is 20%. Option B.

Step-by-step explanation:

The percentage of total solids concentration that you want primary sludge to be before being pumped to an anaerobic digester is Option B) 20%.

In the wastewater treatment process, primary sludge is the solid waste that is removed from the settling tank during primary treatment. It contains organic matter and other solids. Before being pumped to the anaerobic digester, the primary sludge is typically thickened or concentrated to increase its solids concentration.

The desired percentage of total solids concentration for primary sludge is around 20%.

This concentration helps optimize the anaerobic digestion process by providing sufficient organic material for the bacterial decomposition that takes place in the digester. So Option B.