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Becky Kriger

7 Misconceptions About Plastic and Plastic Recycling - 0 views

  • Plastics that go into a curbside recycling bin get recycled. Not necessarily.
  • In fact, none of the recovered plastic containers from Berkeley are being made into containers again but into new secondary products such as textiles, parking lot bumpers, or plastic lumber – all unrecyclable products. This does not reduce the use of virgin materials in plastic packaging.
  • Curbside collection will reduce the amount of plastic landfilled. Not necessarily. If establishing collection makes plastic packages seem more environmentally friendly, people may feel comfortable buying more.
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  • Since only a fraction of certain types of plastic could realistically be captured by a curbside program, the net impact of initiating curbside collection could be an increase in the amount of plastic landfilled. The Berkeley pilot program showed no reduction of plastic being sent to the landfill in the areas where the curbside collection was in operation.
  • A chasing arrows symbol means a plastic container is recyclable. The arrows are meaningless. Every plastic container is marked with the chasing arrows symbol. The only information in the symbol is the number inside the arrows, which indicates the general class of resin used to make the container.
  • Packaging resins are made from petroleum refineries’ waste. Plastic resins are made from non-renewable natural resources that could be used for a variety of other applications or conserved. Most packaging plastics are made from the same natural gas used in homes to heat water and cook.
  • Using plastic containers conserves energy. When the equation includes the energy used to synthesize the plastic resin, making plastic containers uses as much energy as making glass containers from virgin materials, and much more than making glass containers from recycled materials. Using refillables is the most energy conservative.
  • Our choice is limited to recycling or wasting. Source reduction is preferable for many types of plastic and isn’t difficult. Opportunities include using refillable containers, buying in bulk, buying things that don’t need much packaging, and buying things in recyclable and recycled packages
  • Plastic packaging has economic, health, and environmental costs and benefits.
  • Plastic container producers do not use any recycled plastic in their packaging. Recycled content laws could reduce the use of virgin resin for packaging. Unfortunately, the virgin&endash;plastics industry has resisted such cooperation by strongly opposing recycled -content legislation, and has defeated or weakened consumer efforts to institute stronger laws.
  • Processing used plastics often costs more than virgin plastic. As plastic producers increase production and reduce prices on virgin plastics, the markets for used plastic are diminishing. PET recyclers cannot compete with the virgin resin flooding the market.
  • 1. Reduce the useSource reduction Retailers and consumers can select products that use little or no packaging. Select packaging materials that are recycled into new packaging - such as glass and paper.
  • 2. Reuse containersSince refillable plastic containers can be reused about 25 times, container reuse can lead to a substantial reduction in the demand for disposable plastic, and reduced use of materials and energy
  • 3. Require producers to take back resins
  • Make reprocessing easier by limiting the number of container types and shapes, using only one type of resin in each container, making collapsible containers, eliminating pigments, using water-dispersible adhesives for labels, and phasing out associated metals such as aluminum seals.
  • 4. Legislatively require recycled content Requiring that all containers be composed of a percentage of post-consumer material reduces the amount of virgin material consumed.
  • 5. Standardize labeling and inform the public The chasing arrows symbol on plastics is an example of an ambiguous and misleading label. Significantly different standardized labels for "recycled," "recyclable," and "made of plastic type X" must be developed.
Becky Kriger

On oil and plastic - 0 views

  • Manufacturers take simple hydrocarbons from whatever source material they're using -- commonly crude oil, but also natural gas, corn, and other biomass -- and turn them into polymers
  • In the case of crude oil, they do this by heating it to more than 750 degrees Fahrenheit, then separating its components. The polymers usually travel onward in life in the form of pellets, ending up at one plastic factory or another to be molded into familiar shapes
  • Polyethylene (HDPE or LDPE) is the soft one you likely encounter most, in milk jugs, shampoo bottles, plastic bags, and so forth. Polystyrene (PS) is the hard plastic that makes casings for computers and other appliances
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  • call Styrofoam. Polypropylene (PP) is used in dishwasher-safe containers
  • You'll often find polyethylene terephthalate (PET) in soda bottles, and it is sometimes recycled into fleece, upholstery fabrics, and other useful materials. And then of course there's polyvinyl chloride (PVC)
  • about 4 percent of the world's annual oil production of some 84.5 million barrels per day is used as feedstock for plastic, and another 4 percent or so provides the energy to transform the feedstock into handy plastic.
  • drilling. Recycling, however, does cut into energy use. According to the U.S. EPA, manufacturing new plastic from recycled plastic requires two-thirds of the energy used in virgin plastic manufacture. I have more numbers, too: one ton of recycled plastic saves 685 gallons of oil.
Becky Kriger

Turning Plastics Back to Oil - 0 views

  • Key to GRC's process is a machine that uses 1200 different frequencies within the microwave range, which act on specific hydrocarbon materials. As the material is zapped at the appropriate wavelength, part of the hydrocarbons that make up the plastic and rubber in the material are broken down into diesel oil and combustible gas.
  • "Anything that has a hydrocarbon base will be affected by our process," says Jerry Meddick, director of business development at GRC, based in New Jersey. "We release those hydrocarbon molecules from the material and it then becomes gas and oil."
  • Whatever does not have a hydrocarbon base is left behind, minus any water it contained as this gets evaporated in the microwave.
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  • Take a piece of copper wiring," says Meddick. "It is encased in plastic - a kind of hydrocarbon material. We release all the hydrocarbons, which strips the casing off the wire." Not only does the process produce fuel in the form of oil and gas, it also makes it easier to extract the copper wire for recycling.
  • Autofluff is the stuff that is left over after a car has been shredded and the steel extracted. It contains plastics, rubber, wood, paper, fabrics, glass, sand, dirt, and various bits of metal. GRC says its Hawk-10 can extract enough oil and gas from the left-over fluff to run the Hawk-10 itself and a number of other machines used by Gershow.
  • Because it makes extracting reusable metal more efficient and evaporates water from autofluff, the Hawk-10 should also reduce the amount of end material that needs to be deposited in landfill sites.
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