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Why are rubbish dumps thought to
be a bad thing?
What does recycling mean? Uses of plastics - Statistics
Uses Types of Plastic
PET Polyethylene terephthalate - Fizzy drink
bottles and oven-ready meal trays. HDPE High-density polyethylene - Bottles for milk
and washing-up liquids. PVC Polyvinyl chloride - Food trays, cling film,
bottles for squash, mineral water and
shampoo. LDPE Low density polyethylene - Carrier bags and
bin liners. PP Polypropylene - Margarine tubs,
microwaveable meal trays. PS Polystyrene - Yoghurt pots, foam meat or fish
trays, hamburger boxes and egg cartons,
vending cups, plastic cutlery, protective
packaging for electronic goods and toys. OTHER Any other plastics that do not fall into any of
the above categories. - An example is
melamine, which is often used in plastic
plates and cups. Percentage that can be
recycled About 7% of all household waste is
plastic. Annually, 3 million tonnes of plastic
rubbish are produced.
rubbish 57% of litter found on beaches is plastic. In 2001 only 7% of all plastic was
recycled. Is this the case in your
household? Why recycle plastic?
Why Conservation of non-renewable fossil fuels Conservation
Plastic production uses 8% of the world's oil
production. Reduced consumption of energy.
Reduced Reduced amounts of solid waste going to
landfill. Reduced emissions of carbon-dioxide (CO2),
nitrogen-oxide (NO) and sulphur-dioxide (SO2).
). How are polymers recycled?
How Mechanical recycling of plastics refers to
processes which involve the melting, shredding
or granulation of waste plastics.
or Plastics must be sorted prior to mechanical
recycling. At the moment in the UK most sorting for
mechanical recycling is done by trained staff
who manually sort the plastics into polymer
type and/or colour. More
More Following sorting, the plastic is either
melted down directly and moulded into a
new shape, or melted down after being
shredded into flakes and than processed
into granules called regranulate.
into What can we do?
What An increasing number of local authorities are now providing
plastics collection services. Research by RECOUP has shown
that local authorities can achieve cost-effective high-achieving
plastics collection systems by integrating plastic bottle
collection with other recyclable materials. For example,
Daventry District Council introduced such a system in 1998 and
has been able to increase recycling rates from 12% to nearly
50%. In Adur, West Sussex, and Milton Keynes in Buckinghamshire,
plastic bottles and polystyrene are collected through 'blue box'
schemes, where residents place recyclable materials in a
separate box for sorting by the refuse collectors at the
kerbside. Plastics and other materials are sorted into a
compartmentalised vehicle, then taken to the Materials
Reclamation Facility (MRF) for final sorting before transport to
reprocessing This powerpoint was kindly donated to
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This note was uploaded on 11/09/2011 for the course CHEM 201 taught by Professor Peterson during the Fall '11 term at BYU.
- Fall '11