This Post Contains few Videos to help you understand the Process of Glass Recycling to Produce Sand.
Based on the Business Insider Video, Two college students founded one of Louisiana’s only glass recycling companies. They’re turning glass into sand and using it for coastal restoration.
Learn How Sand Made From Crushed Glass is helping in Rebuilding Louisiana’s Shrinking Coast.
What is Glass Recycling ?
Glass recycling is the processing of waste glass into usable products. Glass that is crushed or imploded and ready to be remelted is called cullet.There are two types of cullet: internal and external.
- Internal cullet is composed of defective products detected and rejected by a quality control process during the industrial process of glass manufacturing, transition phases of product changes (such as thickness and colour changes) and production offcuts.
- External cullet is waste glass that has been collected or reprocessed with the purpose of recycling. External cullet (which can be pre- or post-consumer) is classified as waste.
Different Colours of Recycled Glass
The word “cullet”, when used in the context of end-of-waste, will always refer to external cullet. To be recycled, glass waste needs to be purified and cleaned of contamination. Then, depending on the end use and local processing capabilities, it might also have to be separated into different sizes and colours.
Many recyclers collect different colours of glass separately since glass retains its colour after recycling. The most common colours used for consumer containers are clear (flint) glass, green glass, and brown (amber) glass.
Learning Video on Recycling and crushing Waste Glass and Bottles to Sand for Reuse or Recycling.
“This complete glass crushing and recycling line takes glass bottles and crushes them down to the desired size through a jaw crusher and hammer mill” – MBMLLC
Glass is Ideal for Recycling
It is so since none of the material is degraded by normal use. Many collection points have separate bins for clear (flint), green and brown (amber). Glass re-processors intending to make new glass containers require separation by colour, because glass tends to retain its colour after recycling.
If the recycled glass is not going to be made into more glass, or if the glass re-processor uses newer optical sorting equipment, separation by colour at the collection point may not be required. Heat-resistant glass, such as Pyrex or borosilicate glass, must not be part of the glass recycling stream, because even a small piece of such material will alter the viscosity of the fluid in the furnace at remelt.