Primary Sewage Treatment Includes ________

Question

Primary sewage treatment includes ________.
A)sludge digesting
B)skimming
C)filtration
D)chlorination
E)aeration

Accepted Answer

Primary sewage treatment includes skimming to remove floating debris and solids that can be easily skimmed off the surface. Sludge digesting, filtration, chlorination, and aeration are processes that typically occur in secondary and/or tertiary sewage treatment.