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Water Pollution and Treatment

  •  English    17     Public
    Water pollution review and water treatment steps
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  • What type of water pollution comes from bacteria & viruses often from animal and human waste?
    Infectious Agents
  •  15
  • What type of water pollution comes from organic waste that needs oxygen. This often comes from animal waste, paper mills, and food processing.
    Oxygen Demanding Wastes
  •  15
  • What type of water pollution comes from acids and toxic chemicals often from runoff, industries, and household cleaners?
    Inorganic Chemicals
  •  15
  • What type of water pollution comes from oil, gasoline, plastics, detergents, often from surface runoff, industries, and cleaners?
    Organic Chemicals
  •  15
  • What type of pollution comes from water soluble nitrates, ammonia and phosphates. They are often from sewage, agriculture, and urban fertilizers.
    Plant Nutrients
  •  15
  • What type of water pollution comes from soils and silts from land erosion?
    Sediment
  •  15
  • What type of water pollution comes mostly from power plants?
    Heat Pollution or radioactivity
  •  15
  • What is the largest source of water pollution?
    Agriculture
  •  15
  • What is the source of pollution called when you can specifically locate where it is coming from?
    Point Source
  •  15
  • What is the source of pollution called when you cannot specifically locate where it is coming from?
    Non - Point Source
  •  15
  • What is the first step in water treatment? What does it do?
    Screening - removes large objects
  •  20
  • What is the second step in the water treatment process? What does it do?
    Flocculation - removal of bacteria and impurities (by way of binding them to flocs that settle to bottom of tank)
  •  20
  • What is the third step in the water treatment process?
    Settling
  •  15
  • What is the fourth step in the water treatment process?
    Sand filtration
  •  15
  • What is the 5th step in the water treatment process? What is the purpose of it?
    Post Chlorination - chlorine levels are adjusted, water is disinfected (chlorine, ozone, or uv light)
  •  20
  • What are some optional last steps in water treatment?
    Aeration, PH adjustment, Fluoridation
  •  15
  • What type of water pollution is the largest contributor to ocean dead zones?
    Plant Nutrients
  •  15