Water leaving an efficient wastewater treatment facility ideally has a biochemical oxygen demand (BOD) between ________ units.
A) 50 and 100
B) 25 and 50
C) 5 and 25
D) 0 and 5
Correct Answer:
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Q5: Which of the following bacterial pathogens is
Q6: With increased levels of oxidizable materials, the
Q7: Which process produces a gaseous product that
Q8: Water distribution systems contain
A) very few bacteria
Q9: Opportunistic pathogens such as Legionella, Pseudomonas, and
Q11: What is the advantage of enhanced biological
Q12: Secondary disinfection of drinking water is necessary
Q13: Microbes are sometimes used in secondary treatment
Q14: Aerobic secondary treatment is usually best for
Q15: To further reduce the possibility of biological
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