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sevitz on hazardous waste disposal

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1 Hazardou s Waste Hazardou s Waste Jonathan Sevitz Environmental Business Strategies (Pty) Ltd  [email protected] Water Research Commission 2 Waste Waste –  – where does it go? where does it go? To the “dump”, or “Sanitary Landfill” Daily sand cover (for litter, odour) No burning Channel rain water away Groundwater monitoring How much waste? Ave 1 kg / person /day Where is the largest Landfill in the world? New York….FRESH KILLS landfill  NY – 36 20 0 ton s/ da y = Up to 13.2 M tons/yr 2,200 acres, 3 x the size of Central Park. At full capacity estimated height was 154m. If it had been allowed to get any taller, it would have interfered with air traffic. 3 What can you do about waste? What can you do about waste? Waste…a waste of materials and money and other resources Buy materials Process materials Dispose of waste materials If hazardous waste generated – increased risk 4 The Waste Hierarchy The Waste Hierarchy prevention minimisation reuse recycle energy recovery treatment disposal Zero wast e – is it achieva ble? 5 What about Hazardous Waste? What about Hazardous Waste? Hazardous Waste Landfill Why to a hazardous landfill - what are the problems with waste? Organic matter + wate r + anaerobic conditions = organic acids CO 2 dissolved in rain water = carbonic acid Acid leaches out organics and inorganics (e.g. toxic heavy metals) = Non-degradable highly toxic leachate Therefore need HDPE liner Other problems with landfills Space Odour (NIMBY!) Flammable gases (methane) Groundwater contamination 6

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