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Monday February 25

Monday February 25. Treating Our Wastewater & Groundwater Vulnerability. Good afternoon!. Please place your reading homework on the lab bench Take out your lab data sheet

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Monday February 25

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  1. Monday February 25 Treating Our Wastewater & Groundwater Vulnerability

  2. Good afternoon! • Please place your reading homework on the lab bench • Take out your lab data sheet • Study the diagram on your lab bench with your classmates; be prepared to explain how the wastewater treatment plant depicted compares to the lab completed last class

  3. Steps in Wastewater Treatment • Screening • Coagulation • Sedimentation • Bioremediation • Filtration • Disinfection

  4. Bioremediation(Biological Treatment) Test each sample for nitrate concentration • ________ ppm • ________ ppm What is bioremediation? How is it part of the nitrogen cycle? How effective is it?

  5. Lab Questions • How successful was each stage of treatment in changing the physical appearance of your polluted water sample? • How successful was each stage of treatment in changing the nitrate content of your polluted water sample? • How is the water below Earth’s surface purified naturally? Which parts of this laboratory activity are similar to the process water undergoes in nature, and why? • Why is bioremediation an important process in wastewater (sewage) treatment plants?

  6. How a wastewater treatment plant works

  7. Latrines and Septic Systems Compare each to a wastewater treatment plant • How effective is each? • Advantages of each? • Disadvantages of each?

  8. Artificial Wetlands advantages disadvantages

  9. Aquifer Vulnerability Why do these factors affect an aquifer’s vulnerability to pollution? • Water depth • Rainfall • Aquifer type • Soil type • Lay of land

  10. N and P Cycles Review these! • Nitrogen cycle http://bcs.whfreeman.com/thelifewire/content/chp58/5802004.html • Phosphorus cycle http://science.jburroughs.org/mbahe/BioA/starranimations/chapter4/videos_animations/phos_anim.html

  11. QUIZ NEXT CLASS… • Wastewater treatment process • Compare to lab • Wastewater treatment options • Artificial wetlands • Aquifer vulnerability to pollution • N and P cycles

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