1024LectureFile19a

1024LectureFile19a - Managing Solid Waste How do we get rid...

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1 Managing Solid Waste •How do we get rid of stuff? –Dumps, landfills and incineration. –In its current form (re-use). •Trash it. •Use it again. –In a new form (recycling/composting).
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2 Mo, 7th, Figure 15.1, Page 362. Mo, 7th, Figure 15.2, Page 362. Mo, 7th, Figure 15.3, Page 363. Where do the Wastes Come From? •And what do they consist of? US sources of solid waste
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3 Mo, 7th, Figure 15.8, Page 366. Mo, 7th, Figure 15.15, Page 372. What Have we Been Doing? •And what do other countries do? US solid waste management
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4 Solid Waste Disposal (1) •Originally, just hauled away. –Dropped in a convenient, semi-remote location. –Hence the term “dump”. http://www.un.org/av/photo/gaza/197602.jpg http://www.moab-utah.com/photo/gallery8.html
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5 Solid Waste Disposal (2) •Over time sanitary landfills evolved. –Gradually increasing regulations. –Old dumps and early landfills still around. PTH, 4th, Figure 15.5, Page 421.
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6 Modern Sanitary Landfills (1) •Driving concept: Waste isolation. –What’s inside in and what’s outside out. PTH, 4th, Figure 15.11, Page 425. •Construction: –Impermeable seals below and above.
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7 Modern Sanitary Landfills (2) •Operation: –Daily deposits buried with soil. •Leachate (“trash juice”) removed and treated. PTH, 4th, Figure 15.4, Page 420. PTH, 4th, Figure 15.3, Page 419. PTH, 4th, Figure 15.3, Page 419. –Creates cellular structure. –Monitor groundwater.
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Landfill Problems (1) •Waste isolation prevents decomposition. –Waste will never disappear. –Old buried newspapers are legible. PTH, 4th, Figure 15.8, Page 424.
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1024LectureFile19a - Managing Solid Waste How do we get rid...

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