Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Biodegradable Plastics

For a school project. (Mr. Liranzo 1st period 6th grade Science)
by

Bryan Rodin

on 6 October 2011

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Biodegradable Plastics

Biodegradable plastics Ha! Ha! Ha! Ha! Ha! Oh, Please.
Don't be immature! THIS IS A
SERIOUS MATTER!!! Alright. Now that we've gotten that out of the way, LET'S GET ON WITH THE SHOW! Break It Down! What makes plastics decompose The reason that typical plastics don't decompose is because their long polymer molecules are too large and closely packed together for decomposers to break them down. If you study this image closely, you'll see that the vast majority of this landfill is plastic. DID YOU KNOW...
Plastic takes nearly 1,000 years to decompose in a landfill. It's so sad. It can all be recycled. What Is
Biodegradable Plastic? Biodegradable plastic is plastic that can be broken down by decomposer organisms. Well then, what are decomposer organisms? So what can we do about it? We Grow corn. Could this innocent vegetable be the key to this mystery? The plastic that you and me are used to is called polyethyline terephthatlate (PET), but is crowding our landfills fast, and we know it. What is the answer to all of our troubles? Corn. CORN?!?! Humph. Yeah right.
What part could that stuff possibly have in making biodegradable plastic? You should know that I don't like skeptics. Sorry. Let's give you the lowdown on biodegradable plastic! The Lowdown! They are things like:
Worms
Moles
Fungi
Maggots
Bacteria (Gross!) So What do we do with all this Corn? Turning kernels into polylactic acid. 2 1 3 4 5 6 7 8 9 10 11 12 Shuck the corn stalks. Remove the kernels from the stalks. Mill the kernels. Extract the dextrose
(sugar) from the kernels. Ferment the dextrose. Collect the lactic acid (the by-product of step 5). Convert the lactic acid to lactide. Link the lactide into long chains (polymers). Shape the polymers into the final product. Use, use, and reuse! Compost! Bask in your environmental ingenuity! Did You Know:
Biodegradable plastic Made from corn (Polylactic Acid) Takes 90 days to decompose in the right environment? The Good, the bad, and the yummy Pros and cons of biodegradable plastic. PRO CON Can be composted. Is made from renewable resources Requires 65% less energy to produce, Produces 68% less greenhouse gases Contains no toxins. Waste management will need to adjust methods. Increases moisture and acid levels in compost environment. Consumer can't compost at home. People won't bother to separate PET from biodegradable plastic. Why are we using so much plastic in the first place? If not handled properly, it won't decompose. Use something besides food! Corn harvesting helps speed up soil erosion. ? Acknowledgements Thanks. Mr. Liranzo Larry Rodin Ellen Rodin www.associatedcontent.com For assigning me this project. For proof reading my report. For making sure I stay on task. For being my source for information.
Full transcript