Woodbridge Island Glass Bank

Jan 09 2019

Glass Recycling on Woodbridge Island

Posted in Woodbridge Island News

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Did you know that Woodbridge Island has an ‘igloo’ for glass recycling?
Our glass bank is the large green container for collecting our community’s recyclable glass. This container is used as a recycling point for the community of Woodbridge island to deposit waste glass for recycling.

The glass bank is an initiative of the Trustees of our body corporate to encourage residents to engage in responsible recycling behaviour by separating waste and becoming involved in the collection of used glass.

Glass recycling is the process whereby you return glass bottles and jars to the manufacturers via the container which is collected when full. The manufacturers then melt the glass container to make brand new glass items.

Glass is Natural

Glass is created by melting minerals together at high temperatures. Silica, a form of sand, is the main ingredient and is combined with soda ash and limestone melted in a furnace at high temperatures. Other materials and minerals can be added to produce different colours.

Nature can make glass, when the high temperature of lightning striking silica sand. These ‘lightning-made’ glass tubes or ‘fulgurites’ are formed when, within about a second, lightning with a temperature of at least 1,800 °C melts the silica and fuses the grains of sand together.

Archaeologists have found evidence of man-made glass dating back to 4,000BC in the form of coatings on stone beads. At around 1 500BC the Egyptians are found to have made the first glass bottles in a state we would recognise today.

Glass is made from natural substances, and can be coloured using natural oxides for colourants.

  • Amber Glass is produced by adding together iron, sulphur, and carbon.
  • Green Glass is made by adding non-toxic Chrome Oxide.
  • Blue glass is created by adding cobalt oxide.

Glass containers are preferred as they can handle vacuum or high-pressure sealing. Being impermeable, air-tight, and transparent safeguards the contents against moisture and oxygen, protecting food and beverages from spoiling and bacterial contamination. Glass is also inert, so the contents never tastes like glass.

Glass Recycling Has Many Benefits

  • Recycling conserves our natural resources.
  • Glass can be recycled repeatedly without ever losing its clarity or purity.
  • Recycling glass saves scarce landfill space.
  • Every 1 ton of glass recycled prevents the quarrying of 1.2 tons of raw materials. (Making new glass from recycled glass uses far less energy than using raw materials.)
  • Recycling reduces our carbon footprint.
  • Glass is one of the few 100% recyclable packaging materials.

Recycling is one of the easiest ways for you to have a positive impact on the world in which we live.

Glass Recycling Saves Energy

The energy saving from recycling just one bottle will power one of the following:

  • A computer for 25 minutes
  • A colour TV for 20 minutes
  • A washing machine for 10 minutes

If the average household recycled all their glass in a year, enough energy would be saved to power:

  • A computer for 5 days
  • A colour TV for nearly 4.5 days
  • A washing machine for 2.5 days

Glass recycling reduces greenhouse gas emissions, through reducing the release of CO2 into the atmosphere, helping to minimise climate change. Every ton of new bottles and jars made using recycled glass rather than raw materials prevents the emission of 670 kg of CO2.

If the residents of Woodbridge Island were to fill and recycle 1 container per week, (i.e. over the course of a year we recycle 52 glass containers) this community alone will save 5,201 watts of energy!

Enough energy per week to:

  • Light a compact florescent bulb for: 7 hours, 8 minutes
  • Light a standard 60 watt light bulb for: 1 hour, 40 minutes
  • Operate a computer for: 20 minutes
  • Operate a TV for: 13 minutes, 20 seconds

Or over the year we would:

  • Light a compact florescent bulb for: 15 days, 11 hours
  • Light a standard 60 watt light bulb for: 3 days, 14 hours
  • Operate a computer for: 17 hours, 20 minutes
  • Operate a TV for: 11 hours, 33 minutes

Glass recycling is so simple
Start recycling today to make a difference.

Fun Fact: Bottles and jars manufactured in South Africa contain at least 40% recycled content, one of the highest percentages for packaging in South Africa.


  • 15 Winton Crescent, Woodbridge Island

  • +27 (0)21 552 2489 or +27 (0)82 8920 760

  • louise@a-zholidayhomes.co.za