disinfection
Trihalomethanes are __________.
[removed]
byproducts of drinking water disinfection
[removed]
common as indoor air contaminants from consumer products
[removed]
primarily a problem of medical wastes
Question 3
Secondary sewage treatment is fundamentally a _______________ process.
[removed]
biological
[removed]
chemical
[removed]
mechanical
Question 9
Historically, the use of chlorine bleach has made the pulp and paper industry an important source of __________ contamination.
[removed]
chromium
[removed]
dioxin
[removed]
polychlorinated biphenyls (PCBs)
Question 10
Which of the following are steps in municipal drinking water treatment?
[removed]
Bar screen, grinder, grit chamber, sedimentation tank
[removed]
Settling, coagulation and flocculation, sedimentation, filtration
[removed]
Thickening, stabilization, fluoridation
Question 12
Which of the following chemicals are widely used as flame retardants in consumer products?
[removed]
[removed]
Polybrominated diphenyl ethers (PBDEs)
[removed]
Polychlorinated biphenyls (PCBs)
Question 15
Industrial wastes, if not pretreated before entering a municipal wastewater treatment system, may __________.
[removed]
cause damage to the municipal works
[removed]
kill bacteria used in wastewater treatment
[removed]
both a and b
