GW 52 – Glass
This waste streams constitutes many different types of glass including: bottles, jars, flat/sheet glass, laboratory glass, mirrors, windshields and window glass, crystal and opaque drinking glasses, heat-resistant ovenware (e.g. Pyrex and Visionware) and light bulbs. It is estimated that glass comprise 4.5% of the municipal waste stream (www.consol.co.za). Waste characterization studies indicate that glass comprise between 5% and 17% (Table 6) of domestic waste.
Data on glass largely relates to recycling. The data provided in IWMPs for individual cities and municipalities are primarily estimates. However, national data is reported by the Packaging Council of South Africa and the Glass Recycling Company (Table 11). Despite being 100% recyclable, approximately 32% of all non-returnable glass containers produced annually was retrieved for recycling in South Africa in 2010 (www.consol.co.za).
Currently the Glass Packaging Industry, Consol Glass and Nampak Glass, produces glass estimated in the region of one million tons per annum. Of this less than 25% of the glass containers produced in South Africa is recovered and recycled. Figure 2 shows the historical glass recycling trend over the past 16 years.
Table : Provincial Waste Glass (Cullet) Recoveries (1 July 2010 to 30 June 2011) (The Glass Recycling Company, 2011)
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