Technology of Recycling

1
Technology of Recycling
By Susy Kindred
Source http//www.main.org/nuna/welcome_to.html
2
Energy Balance

• Energy required to make products from recycled
  materials
• vs.
• Energy required to make products from virgin
  material
• Factors sources, collection of recyclables,
  virgin materials, process equipment

3
Why this doesnt work

• Recyclables change hands many times
• Recycling is done by private companies
• Everyone does it differently

4
What I did instead

• Estimate of energy required to collect
  recyclables nationwide

5
Source ttp//www.concordnet.org/cpw/recycle/html/
drivers.html
6
Paper

• Collected
• De-inked
• - Slush
• - Detergent
• Addition of new materials
• Bleached
• Dried
• Ironed
• Rolled

Source http//www.carneyswaste.com/images/recycle
_paper_web.jpg
7
Plastic

• Collected
• Separated
• Grind
• Clean
• Remold

Number Code Polymer
1 PET Polyethylene Terepththalate
2 HDPE High Density Polyethylene
3 PVC Polyvinyl Chloride
4 LDPE Low Density Polyethylene
5 PP Polypropylene
6 PS Polystyrene
7 Other
http//www.basscoast.vic.gov.au/files/685_recyclin
g20plastic.jpg
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Glass

• Collected
• Separated by color
• Crushed
• Cleaned
• Used as cullet
• Or remolded

Source http//www.lotfi.net/recycle/Img0018.JPG
9
Metals

• Collected
• Separated into aluminum and steel
• Aluminum Steel Steel sells
• Shredded Flattened at 0.10/lb
• Cleaned De-tinned Tin sells
• Melted Drained at 4.413/lb
• Ingots or sheets Rinsed
• Baled

10
Recycle Anyway?

• Paper is the number one trash in landfills
• Plastic is made from petroleum
• Glass is easy to recycle but even easier to reuse
• Metals are valuable ores
• Environment?

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Improvements

• REDUCE
• REUSE
• THEN RECYCLE

Source http//www.swansea.gov.uk/index.cfm?articl
eid9442