10.
Which of the following are primary wastewater treatment processes? (More than
one response may be correct.)
a. Aeration.
b. Filtration.
c. Chlorination.
d. Sedimentation.
e. Sludge removal.
f. Sludge digestion.
g. Screening and grinding.
11.
What wastewater treatment process removes contaminants that were not
removed by primary and secondary processes? ______________________
12.
Properly controlled chlorination of a wastewater treatment plant effluent will
reduce the bacterial content by about __________________ percent.
13.
Which wastewater treatment processes occur within the septic tank? (More than
one response may be correct.)
a. Primary.
b. Secondary.
c. Tertiary.
MD0161
1-47