Water Pollution and Treatment - PowerPoint PPT Presentation

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Water Pollution and Treatment

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Chapter 22 Water Pollution and Treatment iRespond Question Master A.) Response A B.) Response B C.) Response C D.) Response D E.) Response E Percent Complete 100% 00 ... – PowerPoint PPT presentation

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Title: Water Pollution and Treatment


1
Chapter 22
  • Water Pollution and Treatment

2
Biochemical Oxygen Demand
  • The amount of oxygen required for biochemical
    decomposition process.
  • 3 zones
  • A pollution zone
  • An active decomposition
  • zone
  • A recovery zone
  • When BOD levels are
  • high, DO is low

3
This diagram shows the relationship between DO
and BOD.
4
Waterborne Disease
  • Outbreaks of waterborne diseases
  • Milwaukee, WI - Cryptosporidium
  • Fecal Coliform Bacteria
  • Walkerton, ON E. coli

5
Nutrients
  • Eutrophication
  • The process by which a body of water develops a
    high concentration of nutrients
  • Cultural Eutrophication
  • When eutrophication is accelerated by human
    processes that add nutrients to a body of water

6
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9
Exxon Valdez 1989
10
Ocean Floor Video
BP Gulf Oil Spill
BP Coast Ad
BP Spill
11
Acid Mine Drainage
  • Water with a high concentration of sulfuric acid
    that drains from mines
  • Serious water pollution problem
  • Damages aquatic ecosystems, pollutes bodies of
    water and degrades water quality

12
Surface Water Pollution
  • Water Pollutants are emitted from
  • Point Sources
  • Distinct and confined sources such as pipes from
    industrial or sites
  • Nonpoint Sources
  • Diffused and intermittent
  • Ex) runoffs from streets

13
Identify these as a local point source of
pollution or non-point source of pollution
EB Video
14
Groundwater Pollution
  • Bioremediation
  • a method of treating
  • groundwater pollution
  • problems that utilizes
  • microorganisms in the
  • ground to consume or
  • break down pollutants

Semper Fi Trailer
15
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16
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17
Wastewater Treatment
  • Septic Tank Disposal Systems
  • Waste Treatment Plants
  • Primary Treatment
  • Secondary Treatment
  • Advanced Treatment
  • Chlorine Treatment

18
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19
Wastewater Renovation and Conservation Cycle
  • Steps
  • 1. Return of treated wastewater to crops
  • 2. Renovation or natural purification by slow
    percolation of the wastewater into soil to
    eventually recharge the groundwater resource with
    clean water
  • 3. Reuse of the treated water

20
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22
Water Reuse
  • Inadvertent
  • water is withdrawn, treated and returned to the
    environment
  • Indirect
  • Ex) the wastewater renovation and conservation
    cycle
  • Direct
  • The use of treated wastewater that is piped
    directly from a treatment plant to the next user

CA Wastewater reuse
23
Water Pollution and Environmental Law
  • Environmental Law
  • The branch of law dealing with conservation and
    use of natural resources and control of pollution
  • Clean Water Act
  • Safe Drinking Water Act
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