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Pollution & Waste Control

Pollution & Waste Control

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Pollution & Waste Control

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  1. Pollution & Waste Control

  2. Preventing Air Pollution • Pollutant removal technologies: • Catalytic converters on cars • Baghouse filters • Electrostatic precipitators • Air “scrubbers” • Fluidized bed combustion of coal

  3. Baghouse filters

  4. Electrostatic precipitators

  5. Air “scrubbers”

  6. Fluidized bed combustion • Coal contains impurities, primarily sulfur compounds • SOXpollution created when combusted • Coal burned in proximity to calcium carbonate • Reaction produces calcium sulfate • Can be used in the production of sheetrock (drywall) for construction

  7. Wastewater treatment • Animal and human wastewater often contains disease-causing pathogens • Septic systems • Wastewater treatment plants (sewage)

  8. Sewage treatment

  9. Manure lagoons • Ponds lined with rubber or plastic to prevent leeching • Filled with manure (animal waste) • Digested by bacteria • Spread onto fields as fertilizer

  10. Oil pollution • Oil pollution can be natural or man-made

  11. Oil pollution remediation • Containment booms • Oil is less dense than water (it floats) • Prevent floating oil slicks from spreading • Chemicals to disperse oil • Can be toxic • Bioremediation • Genetically-engineered bacteria consume oil