Water Pollution - • Domestic animal & wildlife wastes...

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Water Pollution IE380: MIE380: Ecological Systems Spring 2010 March 10, 2010
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Pathways for Pollution No boundaries Cross-media contamination 2
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Pathways for Pollution (cont’d) Point source: discrete sources Non-point source: diffuse sources 3
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Types of Pollution Heat Dust/Sediment cids Acids Pesticides Fertilizers Infectious Agents 4
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Nutrient Pollution 5
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Nutrient Pollution (cont’d) 6
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Eutrophication Anoxia Algal bloom Free Oxygen Hypoxia Resilience 7
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Eutrophication (cont’d) Complications : Organic Water Pollutants Sedimentation Thermal pollution Climate 8
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Eutrophication (cont’d) 9
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Types of Infectious Agents Hepatitis Polio Typhoid fever Amoebic dysentery Cholera Parasitic worms Salmonella 10
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Sources of Infectious Agents Untreated/improperly treated sewage
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Unformatted text preview: • Domestic animal & wildlife wastes • Livestock & meat processing industry 11 Measuring Pollution 12 Measuring Pollution (cont’d) • Oxygen Demand : The amount of oxygen required to biodegrade a given quality of dissolved material by aerobic microorganisms [ mg O 2 per litre] → y = oxygen consumed in the bottle L = BOD [mg O 2 /L] k 1 = decay constant [day-1 ] 13 ( ) s b f i V V DO DO y-= ( ) t k-exp-1 y L 1 = o Oxygen Sag Curve 14 Bottled vs Tap 15 • According to the NRDC, about 22% of the brands of bottled water they tested contained chemical contaminants were at levels above strict state health limits. • About a quarter of bottled water is just tap water anyway. Sometimes it’s further treated, sometimes it isn’t 16 Source: NRDC...
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This note was uploaded on 07/24/2010 for the course MIE MIE380 taught by Professor Enright during the Spring '10 term at University of Toronto- Toronto.

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Water Pollution - • Domestic animal & wildlife wastes...

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