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EHST 2110 EXAM 2 ECU QUESTIONS AND ANSWERS $9.00   Add to cart

Exam (elaborations)

EHST 2110 EXAM 2 ECU QUESTIONS AND ANSWERS

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  • EHST 2110
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  • EHST 2110

EHST 2110 EXAM 2 ECU QUESTIONS AND ANSWERS

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  • September 23, 2024
  • 43
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • EHST 2110
  • EHST 2110
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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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