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EHST 2110 EXAM 2 ECU QUESTIONS AND ANSWERS
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EHST 2110 EXAM 2 ECU QUESTIONS AND ANSWERS
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Name: Score:47 Multiple choice questions
Definition 1 of 47
Mechanical process, screens and sedimentation tank
Secondary Treatment
Septic Tank
Primary Treatment
Activated Sludge
Definition 2 of 47
Urban slums, sewage dumped into warm water. Cholera reappears during an algae bloom, can
stay dormant. Spread to Colombia, Peru, Ecuador, and Chile. El Nino heating ocean surface
waters, moves the cholera up and down the coast of South America.
Broad Street Well (cholera)
Hypoxia in the Gulf of Mexico
Cholera in South America
Nitrates in Water
Definition 3 of 47
Spray irrigation is a method of disposing of secondary treated municipal wastewater by
spraying it on the land surface. Contains nitrates and phosphates from concentrated manure.
During wet times or cold times, a considerable amount of runoff occurs.
Secondary Treatment
Aim Of Sewage Treatment
Soil Absorption Field
Spray Fields
,Definition 4 of 47
When chlorine added to naturally occurring organic matter in lakes or rivers. Demonstrates
carcinogenic activity in living beings.
Arsenic
Leachate
Trihalomethanes
Water Pollution
Definition 5 of 47
Caused by Industrial discharges of strong acids of alkalis can corrode both sewer pipes and
equipment at the POTW.
Structural Damage to Sewer System and Treatment Plant
Air Pollution from Industrial Emissions
Noise Pollution from Industrial Machinery
Chemical Contamination of Groundwater and Soil
Term 6 of 47
Is technology the answer to environmental health?
Yes
No
Definition 7 of 47
Resistant to chlorine and need filtration in addition to disinfection. (mainly crypto)
Nocardia & blood worms
Giardia & Cryptosporidium
Nematodes & water bears
Stalked ciliates & giardia
,Definition 8 of 47
Mechanical Treatment. The bar screen filters out larger items. The grip chamber, the water
flows out and the grit and little items filters out, then goes into sedimentation/settling tank
water sits for 8-12 hours and suspended solids sink to the bottom, solids converted to fertilizer.
Tertiary Treatment
Sewage Treatment
Chemical Waste Treatment
Secondary Treatment
Definition 9 of 47
- Point Source Pollution: You can see where the contaminants are coming from
- Non-point Source Pollution: Unable to source where the contaminants origin are.
Soil Absorption Field
Pfiesteria Piscicida
2 Categories of Water Pollution
Biological Nitrogen Removal (BNR)
Definition 10 of 47
Potentially have arsenic, radioactive contaminants, pesticides, nitrates, hormones, fluorine
compounds, lead, calcium, hexavalent, chromium, pharmaceutical drugs (through toilet matter,
into water), aluminum, or trihalomethanes (THMs).
Contamination of Drinking Water
Safe Drinking Water Act
Lead in Drinking Water
Increased Acidity of Rainfall
, Definition 11 of 47
Garbage seepage going into the ground.
Hazardous Waste
Leachate
Methane
Sewage
Definition 12 of 47
Agriculture: farmland runoff, manure from livestock facilities, chemical fertilizers, (nitrates &
phosphates from fertilizer), and pesticides. Constructions activities: runoff from construction
sites contributes 10-20 times more sediment than agriculture; also carries construction waste
materials into waterways. Urban street runoff/storm water runoff, acid mine drainage, fallout of
airborne pollutants. Acid Deposition.
Biosolids contamination
Non-Point Source Pollution (5 points)
Soil absorption field
2 Categories Of water pollution
Definition 13 of 47
Caused by industrial discharge. sludge, containing excessive concentrations of heavy metals..
(cadmium, mercury, lead, arsenic.)
Biosolids Contamination
Acid Deposition
Clean Water Act Part 503
Trickling Filter
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