1 / 12

Sanitary Landfills

Sanitary Landfills. Municipal Solid Waste: Lesson 3b. Objectives. Students will understand the basic structure of a sanitary landfill. Students will understand the difference between the old style landfill and the sanitary landfill. Nevada State Standards: Grades 9-12.

phong
Download Presentation

Sanitary Landfills

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Sanitary Landfills Municipal Solid Waste: Lesson 3b

  2. Objectives • Students will understand the basic structure of a sanitary landfill. • Students will understand the difference between the old style landfill and the sanitary landfill.

  3. Nevada State Standards: Grades 9-12 • N.12.B Students understand the impacts of science and technology in terms of cost and benefits to society. • N.12.B.1 Students know science, technology, and society influenced one another in both positive and negative ways. E/S • N.12.A.5 Students know models and modeling can be used to identify and predict cause-effect relationships. I/S • E.12.C.5 Students know soil, derived from weathered rocks and decomposed organic material, is found in layers. E/S

  4. Lesson • Draw layers of the sanitary landfill. • Gather students in groups of 5, depending on class size. • Pass out prefilled reusable grocery bags.

  5. Lesson • Mark 2” from top of bottle with marker. • Use scissors or knife to cut the top of the bottle off. • Cut nylon hose into 2” squares, 2 per group.

  6. Lesson • Place 2 cotton balls into the neck of the bottle and rubber band the hose squares around the nozzle (later, this will slow the drainage and represent rainfall). • Add 1 cup of soil to represent ground.

  7. Lesson • Add modeling clay disk to the model. Clay should be cut 5” in diameter. Press the clay to the sides of the bottle to form a seal. • Add precut plastic circle to model to form a liner (5” diameter).

  8. Lesson • Add 1 cup of gravel. • Add plastic drinking straw, used to represent pipes for collection and treatment of leachate.

  9. Lesson • Add 5” diameter, precut, circle of material representing geotextile fabric. • Add a layer of soil to the model.

  10. Lesson • Add shredded paper to the model to represent MSW. • Add a final layer of soil to the model to represent daily cover. • Place top of bottle upside down in bottle. • Using the measuring cup, pour water into the landfill model, through the upside down lid (this will emulate rain).

  11. Questions to Answer • How does this model show us how leachate flows through a landfill? • What are the benefits of using a sanitary landfill? • What are your general thoughts on the differences between the sanitary landfill and the old style landfill?

  12. Questions to Answer • Why is it important to prevent leachate from getting into the groundwater? • What types of substances could leach into the groundwater from a landfill? • How has the technology of the sanitary landfill impacted society?

More Related