Question 1 Metals present in municipal wastewater may still be present in treated sewage sludge cause damage to the
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Question 1
Metals present in municipal wastewater may still be present in treated sewage sludge; __________.
cause damage to the municipal works
interfere with coagulation and flocculation
kill bacteria used in wastewater treatment
a and c but not b
all of the above
Question 2
Historically, the use of chlorine bleach has made the pulp and paper industry an important source of __________ contamination.
dioxin
chromium
polychlorinated biphenyls (PCBs)
Question 3
Chlorination of drinking water is highly effective at killing __________.
bacteria
protozoa
viruses
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