Glass wasted from household consists mainly of beverage bottles, preserving jars or broken tumblers. A plastic or metal box, a bucket or even a stronger carrier bag can perfectly serve for storing wasted glass in your household. Keep the sorted glass waste in your boxroom or cellar before carrying it away to the collection container.
What‘s Going on with Glass Waste?
Sorting in Households
28.93 kg of glass will sort out an average Czech household per year
Containers for Glass Sorting
87,128 of containersfor glass sorting can be found in the Czech Republic in total
Glass waste is usually collected in a special bell-shaped container. As against ordinary containers provided with wheels and a lid and emptied by tipping, this bell-shaped container has to be first lifted above the open body of a lorry and then its bottom should be opened to discharge the glass in the vehicle body. In certain areas there are containers divided vertically into two chambers painted in green and white. The chambers are used for separate collection of coloured glass and colourless glass in the green chamber and the white chamber, respectively.
more than 133,000 tons of glass waste is collected from the towns and villages of the CZ every year
The method used for glass waste collection will depend on the particular collection service supplier and employed containers. In case the bell-shaped vessels are used, a lorry with an open body should be used for collection. These vehicles offer an advantage, if their body can be divided with a partition allowing coloured and colourless glass to be placed each in the separated part of the body. Glass waste is usually collected in the premises of the collection firm or in other tranship yard to be then transported to the special final sorting line. As the final sorting of glass waste before its future use puts high demands on process quality, there is a few glass sorting plants in the Czech Republic only. That is why glass waste should be often transported to a long distance, either by a lorry or by train.
Final Sorting Line
more than 410 tons of glass are subjected to final sorting every day
The final sorting lines for glass waste operate independently or may form a part of a glassworks. They should remove completely and thoroughly any foreign material that must not go in the process of recycling in order the entire lot of glass products to be protected from deterioration. At the first stage larger admixtures, typically ceramics and porcelain, metals and other solids are removed manually. Then the glass is crushed and dressed in the system of conveyors and oscillating screens. Finally it is finished to the required high purity employing opto-electronic sensors. Presence of impurities would cause dramatic impairment of the properties of new glass products. Commonly occurring pitfalls that can be easily handled by the final sorting line include labels and metal parts.
75 % of glass waste are recycled and reused in the Czech Republic every year
The use of sorted glass waste brings not only very significant energy savings for glassworks but this product of recycling also replaces primary raw materials. Subject to employed technology the batch can consist of as much as 60 – 80 % of sorted glass waste. Cullet, comprising a part of the batch, will be melted, together with other batch components, at a temperature of about 800-1400 °C, before being converted into new products. The process of glass recycling offers a great advantage in that it can be repeated to infinity.
up to 100 % of recycled glass can be included in a new glass product
The sorted glass is used, most frequently, for the production of container glass, i.e. bottles for mineral water, alcoholic beverages and beer and for other glass articles as well. Sorted glass waste is further used for production of heat insulating materials, such as glass wool and cellular glass, or as a special admixture to special types of concrete and abrasive materials.