solid waste disposal
DESCRIPTION
Solid Waste Disposal. How do we get rid of garbage?. Open dumping (ground or water) Landfill Incineration Recycling. Increasing Desirability. Open Dumping. Advantages. Disadvantages. Water + Soil Pollution Health Hazard Hurts Animals UGLY!. Convenient Cheap. Landfill. Advantages. - PowerPoint PPT PresentationTRANSCRIPT
Solid Waste Disposal
How do we get rid of garbage?• Open dumping (ground or water)• Landfill• Incineration• Recycling
Increasing Desirability
Open Dumping
Advantages• Convenient• Cheap
Disadvantages• Water + Soil Pollution• Health Hazard• Hurts Animals• UGLY!
Landfill
Advantages
• Efficient way to deal with large volume
• Filled land can be used…• Can create energy
– CH4 produced can be burned– Carbon-offsets @ Knott
Disadvantages
• People don’t want to live near them
• Transport of waste• Maintenance• Poor decomposition rate• Possible leaching into water
systems• Produces Methane
Incineration
Advantages• Reduces Volume• Minimal Space• Stable Residue• Energy Source?
Disadvantages• Expensive• Can Cause Release of
Pollutants (Dioxins)• Requires Energy• CO2 + NO2…
Special Case: Nuclear WasteIssues:• Low level= hospitals…• High level (small amounts)=
spent fuel. Metal rods contain ceramics + radioactive isotopes
• Stays active (lethal, actually) for 1000s of years
• Transportation to long term facility
• Terrorism danger
How we are dealing with it• Low level=
landfill/incineration• High level= Stored @ the
site in pools and then concrete bunkers
• Future = burying at Yucca Mountain, NV?
• Trying to develop a recycling method. Reprocessing already active in UK + Francehttp://www.whatisnuclear.com/articles/waste.html
http://www.nei.org/keyissues/nuclearwastedisposal/
Recycling
Advantages• Less Waste• Less Pollution (than creating
new materials)• Less Energy Use (than
creating new materials)
Disadvantages• Expensive (transport,
sorting, cleaning, repurposing)
Recycling- Paper
• Sorted• Washed• Slurry• Re-pressed
Recycling- Metals (mainly Al and Fe)
• Sorted• Melted• Reused• Bam
Recycling- Glass• Sorted• Washed• Crushed• Melted• Molded• (can be recycled
multiple times)
Recycling- Plastic
• Sorted• Degraded with heat/hydrogenation/cracking• Repolymerized• Reformed
Link to ppt
from Alyssa Here!
Zero Waste Family