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Environmental Engineering Lecture 1 Dr. Hasan Hamouda

Environmental Engineering Lecture 1 Dr. Hasan Hamouda. What is Environmental Engineering Science?. We are concerned with the quality and availability of environmental resources and with the waste streams that impact them Science …improve our understanding of natural processes

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Environmental Engineering Lecture 1 Dr. Hasan Hamouda

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  1. Environmental Engineering • Lecture 1 • Dr. Hasan Hamouda

  2. What is Environmental Engineering Science? • We are concerned with the quality and availability of environmental resources and with the waste streams that impact them • Science…improve our understanding of natural processes • Engineering…use this understanding to develop and apply technologies that will maintain or improve environmental quality

  3. What is an engineer? • Problem solver. • Specifically, one who uses science to solve real world problems. • SO, what about an environmental engineer? • Solves environmental problems using scientific tools

  4. Environmental Engineering • Air pollution • Control devices-control unit • Permitting-license • Modeling • Water (surface and groundwater): • Treatment & disinfection • Storage and distribution • Dispersion • Quality • Wastewater • Solid Wastes • Hazardous Wastes • Radioactive Wastes • Integrated Systems • Pollution Prevention • Other – noise and light pollution

  5. WATER QUALITY Engineering • Water treatment - take water from a source and subject it to treatment processes to make the water suitable for its intended use • Waste water treatment - after water is used, it is collected and treated to make it suitable to be returned to the environment

  6. A first Water Quality Engineering Problem • 1854, outbreak of cholera in London • 10,000 deaths • Convinced city official to remove pump handle

  7. Water Treatment Plants Thorton, CO Boulder, CO Polino Pass, CA Assignment1: visit http://www.epa.gov/OGWDW/kids/treat.html and go through the treatment processes on the website, and then draw your own schematic of all the processes.

  8. How the Waste Water Treatment Plant Works

  9. A few problems that we need to solve! • RUN-OFF: Contamination of aquatic environments by fertilizers and pesticides in agricultural runoff • GROUNDWATER CONTAMINATION: Contamination of groundwater resources, especially by hazardous wastes • REUSE: Treating wastewater for reuse

  10. AIR QUALITY Engineering • Apply science and technology to control adverse effects of air pollution on human health and welfare, on other organisms, on materials, or on ecosystems • Most efforts focus on emission sources since once pollutants are emitted into the atmosphere, there are no practical engineering techniques for removing them

  11. Clear Day Hazy Day

  12. Rocky Mountain National Park

  13. Metal foundry refining in early industrial Germany, 1870s

  14. We’ve come a long way baby???

  15. Early 1900s, NY City

  16. Kuwait, August 1990 Kuwait, February 1991

  17. 3 April 2002 Pollution doesn’t have boundaries This dust plume passed over urban areas in China, Korea and Japan, cruised over the Pacific Ocean and eventually made its way to Alaska.

  18. WHY DO WE CARE?? Some air pollutants cause adverse health effects, and we don’t like feeling bad or dying young. Two examples of particle collectors in southern California

  19. Human welfare… Melon leaves damaged by ozone Statue damaged by acid rain Feedlot

  20. A few problems that we need to solve! • ACID RAIN: Deposition of contaminants emitted into the atmosphere that have been converted to acidic species • OZONE HOLE: Depletion of stratospheric ozone by chlorine from CFCs • BIOMASS COMBUSTION: Exposure of women and children to emissions from biomass cook stoves in rural areas in developing countries

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