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6. Advanced treatment is generally used to treat waste water to
A. remove coarse solids
B. remove settleable solids
C. reduce BOD
D. remove additional objectionable substances
7. Treatment of municipal water supplies is based upon
A. coagulation, filtration, chlorination
B. chlorination, filtration, coagulation
C. filtration, coagulation, chlorination
D. coagulation, chlorination, filtration
8. What is an anaerobic digester?
A. New diet drink
B. Microbe that eats hazardous waste
C. Method to convert agricultural waste into a biogas
D. All of the above
9. The use of microbes to break down synthetic waste products such as polychlorinated biphenyls is called
A. bioinformatics
B. biolistics
C. biotechnology
D. bioremediation
10. Activated sludge contains a large number of
A. bacteria
B. yeasts and molds
C. protozoa
D. all of these
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