civil engineers: environmental engineering erik r. coats, pe, ph.d. ce 115 november 10, 2005
TRANSCRIPT
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Civil Engineers:Environmental Engineering
Erik R. Coats, PE, Ph.D.
CE 115
November 10, 2005
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What do we do?• Solve problems
– Design infrastructure and systems to remedy “pollution” that is either human-caused or naturally occurring such that exposure does not cause harm
• More specifically:– Potable Water Treatment– Wastewater Treatment– Landfill Design– Hazardous Waste Treatment– Surface Water and Ground Water Quality
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Water Treatment• Produce safe drinking water
• Surface water and ground water
• EPA establishes minimum standards>129 contaminants regulated• Inorganics
• Arsenic at 0.01 mg/L
• Microbial• E. coli• Cryptosporidium: Milwaukee (1993) 400,000 sick;
100 deaths
• Synthetic organics• Man-made contaminants: we then need to remove
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Wilsonville Water Treatment Plant
• Drinking Willamette River water– Industrial, agricultural, and municipal
discharges– Fish deformities– Carcinogens– Teratogens: birth defects
• Solution: advanced physical & chemical treatment technology
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Treatment Process
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River Intake
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Sedimentation
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Ozonation
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Granular Activated Carbon
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Filtration
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Water Supply Planning
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Why Treat Wastewater?• Organics – deplete oxygen
• Nutrients – toxic; deplete oxygen
• Pathogens – human contact
• Temperature?
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Wastewater Treatment• Reclaim water for non-potable and potable
uses– Discharge to surface water– Irrigation– Industrial re-use– Wetlands reclamation
• Reclaim solids– Fertilizer– Plastic?
• http://www.wef.org/apps/gowithflow/theflow.htm
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Rock Creek, OR WWTP
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Moscow, Idaho WWTP
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Influent Wastewater
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More Influent
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Biological Treatment
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Disinfection
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Biosolids Processing
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Final Effluent!
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Colfax, WA WWTP
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Colfax, WA WWTP
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Plastic from Wastewater?
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Landfills – do we deal with trash?
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No - we design the infrastructure
• Waste cells
• Leachate collection
• Storm water management
• Gas collection
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Typical Landfill
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Landfill Liner
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Landfill Closure
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Composting
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Landfill Leachate – control?
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Landfill Bioreactor
• Recycle leachate – enhance biological activity
• Increases waste decomposition rate
• Increase landfill capacity
• Recover gas (methane) for power generation
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Where do we work?
• Consulting
• Industry
• Regulatory
• Environmental groups
• Academics
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Science background?
• Biology
• Microbiology
• Chemistry
• Biochemistry
• Physics
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Thank you!
Questions?