ENVIRONMENTAL ENGINEERING
EXAM 3 QUESTIONS AND ANSWERS
Balanced Temperature - Correct Answers -60s
Balanced pH - Correct Answers -70s
Removed Bacteria - Correct Answers -80s
Removed Viruses - Correct Answers -90s
Removed Nitrogen and Phosphorus - Correct Answers -2000s
Trace Level Organics - Correct Answers -2010s-Present
Solids Loading Rate - Correct Answers -Rate at which total suspended solids enter the
system
Sludge - Correct Answers -Mixture of water, organic, and inorganic solids within the
treatment process
Activated Sludge - Correct Answers -Concentration of aerobic microbe that consume
carbon and nutrients in wastewater
Biochemical Oxygen Demand - Correct Answers -Amount of O2 needed by bacteria to
break down waste
25% of US Wastewater Treatment - Correct Answers -Facultative Ponds
Organic Loading Rate - Correct Answers -Rate at which organics are added to the
system
Mixed Liquor Suspended Solids - Correct Answers -Mixture of aerated wastewater and
sludge
Sludge Age - Correct Answers -How long cells are in system; 6-15 days
Aeration Tanks - Correct Answers -Provide air to keep desired O2 concentration in
reactor
EXAM 3 QUESTIONS AND ANSWERS
Balanced Temperature - Correct Answers -60s
Balanced pH - Correct Answers -70s
Removed Bacteria - Correct Answers -80s
Removed Viruses - Correct Answers -90s
Removed Nitrogen and Phosphorus - Correct Answers -2000s
Trace Level Organics - Correct Answers -2010s-Present
Solids Loading Rate - Correct Answers -Rate at which total suspended solids enter the
system
Sludge - Correct Answers -Mixture of water, organic, and inorganic solids within the
treatment process
Activated Sludge - Correct Answers -Concentration of aerobic microbe that consume
carbon and nutrients in wastewater
Biochemical Oxygen Demand - Correct Answers -Amount of O2 needed by bacteria to
break down waste
25% of US Wastewater Treatment - Correct Answers -Facultative Ponds
Organic Loading Rate - Correct Answers -Rate at which organics are added to the
system
Mixed Liquor Suspended Solids - Correct Answers -Mixture of aerated wastewater and
sludge
Sludge Age - Correct Answers -How long cells are in system; 6-15 days
Aeration Tanks - Correct Answers -Provide air to keep desired O2 concentration in
reactor
