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13 comments

Biodegradable May Not Be Best

Posted July 06, 2011 3:24 PM

Biodegradable plastic packaging and products are typically considered an environmental good, until one reads new research from North Carolina State University. Disposable utensils and other items composed of biodegradable polymers break down too quickly when landfilled, releasing methane at a rapid rate. Some operators capture and use the methane, but most don't. Should packaging/product designers rethink material selection and end-of-life management considerations?

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#1

Re: Biodegradable May Not Be Best

07/07/2011 3:37 AM

D'uh?
Releasing methane too quickly? What, like making too much proffit or buying too much beer?
Del

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#2

Re: Biodegradable May Not Be Best

07/07/2011 8:19 AM

Sounds like an advantage to me. Cap the landfill and harvest the gas. Might need smaller, simpler, cheaper gas compression systems. No fracking needed. Easier than trying to capture methane from flatulent cows!

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#3

Re: Biodegradable May Not Be Best

07/07/2011 9:41 AM

Landfills are being designed to handle this, for christ sake. Its a problem that can be mitigated....I like that word. And not act as though you run around like a bunch of chickens with your head cut off. Crying the sky is falling.

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#4

Re: Biodegradable May Not Be Best

07/07/2011 1:50 PM

Simple, for the author full of it, er, full of fear.

Eat from homemade stone dishes, with homemade wooden forks and knives. Thereby you achieve carbon neutrality, your own methane emissions excluded.

I suggest, you capture your methane emissions for better use. That is in sych with the level of your thinking.

How gets such a nitwit on an "Engineering Website"??

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#13
In reply to #4

Re: Biodegradable May Not Be Best

08/27/2011 6:23 PM

I'm designing fuel cells that will fit in your underwear. So far I've been able to recharge my cellphone on 1/2 lb of broccoli.

My next endeavor will be to install fuel cells in the seats of the local movie theater. I've calculated that if the concession stand focus on selling hot dogs and cheese nacho combos I will be able to power the projector and sound system with 30 per cent capacity. At 78 per cent the AC.

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#5

Re: Biodegradable May Not Be Best

07/07/2011 2:06 PM

Wow.. whatever the landfill conditions are, they sure are not approximated by your backyard compost pile. I was duped into buying these 'biodegradable' plastic compost bags, and used them for about a year until I realized they were not breaking down at a reasonable rate whatsoever. Shreds of the offending material can still be found in the garden three years later. Paper bags, which are in the "slow" category according to the author, are gone by the time you turn the compost in spring.

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#6
In reply to #5

Re: Biodegradable May Not Be Best

07/07/2011 2:19 PM

Ah, you don't understand... the way to get plastic to degrade is to put something important, or something you don't want to spill into it.
You can bet the next time you pick it up, it will dissintegrate in you hands spilling the contents onto your feet.
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#7
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Re: Biodegradable May Not Be Best

07/07/2011 9:23 PM

Indeed, the classic "forever' plastic bags reliably shatter in the cold here during winter, and are not nearly as durable as the biodegradable type. And thank goodness for cloth grocery bags, it seems a small miracle to get home from the store with everything intact instead of a bunch of stretched, holed, basically useless bags.

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#8

Re: Biodegradable May Not Be Best

07/07/2011 9:50 PM

Since methane is so much more destructive to our environment than carbon dioxide, let's save the earth by lighting our farts instead of just letting them rip. I can envision a new growth sector with solar-powered after-burners for cows. I bet THAT would stampede the herd!

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#9
In reply to #8

Re: Biodegradable May Not Be Best

07/07/2011 10:14 PM

I can envision a new growth sector with solar-powered after-burners for cows.

There was a government funded study done on the methane production of cows.

as far as fart lighting......

http://www.youtube.com/watch?v=ddUotyR3WEA

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#10

Re: Biodegradable May Not Be Best

07/11/2011 2:56 PM

Not really seeing a downside to the current paradigm. Don't "fix" what's not broken.

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#11

Re: Biodegradable May Not Be Best

07/18/2011 3:45 AM

I dont know why they are putting a plastic that converts to methane gas ,a new energy source, into a landfill where it cant be converted to energy.

My question was:Could Someone that has the authority to head sustainable energy experiments make an attempt to force Rainwater by using recycled Plastic wrap as a makeshift greenhouse Roof over Forested parcels of land like tree lines etc.. or use the clear plastic Tarps as makeshift Greenhouse roofs over large groups of Trees possibly creating a temporary Americanized version of a Rain Forest just until the over Heated atmosphere cools down a little more.

With the goal being to Produce Moisture underneath the tarps keep the Ground watered and fresh chlorophyl alive inside it, even though the Rain is not falling from the sky long enough at this time.and later if successful, doing this in order to Water the Orchards ,the Grain Crops and the Pine Forests as well.ds

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#12

Re: Biodegradable May Not Be Best

08/10/2011 6:11 PM

As a sailor,I go to sea & look into the deep;when the sun is right I can see the flecks of degraded plastic.Plastic particles are not as immediately lethal to sea-life as sheets of plastic;but they get into a 'soup'.The fish,whales & dolfins live in this 'soup'.

Plastic is with us forever,we're learning the problems:compromises abound.

Weather tis nobler to make/use durable/reusable -or-single use rapid disintergrate plastic,presumably there is justification for both.Ultimately they turn to dust & it's the chemical residue to consider after the physical hazards for wildlife has passed.

"Satisfaction of one's curiosity is one of the greatest sources of happiness in life". [Linus Pauling]

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