ENVIRONMENTAL ENGINEERING EXAM 3 QUESTIONS AND ANSWERS

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