Earth_122_Ch18_notes[1]

Earth_122_Ch18_notes[1] - Introduction to Environmental...

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3/20/2009 1 Introduction to Environmental Science Introduction to Environmental Science: 18. Solid, Toxic and Hazardous Waste Earth 122 Prof. Walter A. Illman Solid, Toxic and Hazardous Waste We have no knowledge, so we have stuff; but stuff without knowledge is never enough. Greg Brown
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3/20/2009 2 Objectives Identify the major components of the waste stream and describe how wastes have been and are being disposed of in North America and around the world. Explain the differences between dumps, sanitary landfills and modern secure landfills. Summarize the benefits, problems, and potential for recycling and reusing wastes. Objectives Analyze some alternatives for reducing the waste we generate. Understand what hazardous and toxic wastes are and how we dispose them. Evaluate the options for hazardous waste management management. Outline some ways we can destroy or permanently store hazardous wastes.
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3/20/2009 3 Outline Solid Waste Waste Disposal Methods Shrinking the Waste Stream Hazardous and Toxic Wastes Options for Hazardous Waste Management SOLID WASTE According to EPA, U.S. produces 11 billion tons of solid waste annually solid waste annually. About half is agricultural waste. More than one third is mining related. Industrial Waste 400 million metric tons. Hazardous/Toxic 60 million metric tons. Municipal Waste 200 million metric tons. Two thirds of a ton per person. Waste Stream –a term that describes the steady flow of varied waste that we produce, from domestic garbage and yard wastes to industrial, commercial, and construction refuse.
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3/20/2009 4 Domestic Waste Sources WASTE DISPOSAL METHODS Open Dumps O ltd d till th Open, unregulated dumps are still the predominant method of waste disposal in developing countries. Most developed countries forbid open dumping. Estimated 200 million liters of motor oil are poured into the sewers or soak into the ground each year in the U.S. .
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Earth_122_Ch18_notes[1] - Introduction to Environmental...

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