MUHAMMAD FAHAD ANSARI 12IEEM 14

1. What is
Environmental
Engineering Science?
MUHAMMAD FAHAD ANSARI
12IEEM 14

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 Environmental Engineering?
 Environmental engineers are the technical professionals
who identify and design solutions for environmental
problems.
 Environmental engineers provide safe drinking water,
treat and properly dispose of wastes, maintain air quality,
control water pollution, and remediate sites contaminated
due to spills or improper disposal of hazardous
substances.
 They monitor the quality of the air, water, and land. And,
they develop new and improved means to protect the
environment.

4. What is Environmental Engineering?
 Although many people are concerned about the state
of our environment, environmental engineers are the
people who do things to protect it from damage and
to correct existing problems.
 Environmental engineers possess the scientific and
technical knowledge to identify, design, build, and
operate systems that make modern society possible.
 In addition to being a field for doing, the
environmental engineering field and environmental
engineering education are multi-disciplinary.
 They involve traditional engineering components
such as mathematics, physics, chemistry, and
engineering design.

5. What is Environmental Engineering?
 But environmental engineering education and
practice also includes a range of other
disciplines, such as biology, microbiology,
ecology, public health, geology, meteorology,
economics, political science, and computer
science.
 To address the spectrum of issues facing the
environment, environmental engineers are
broadly educated, as well as technically trained.

6. Where do environmental engineers work?
 Environmental engineers work in many places.
Some of the common ones are:
 engineering consulting firms that design and
construct air and water pollution-control systems,
 industries that need to treat their air or
wastewater discharges,
 private and municipal agencies that supply
drinking water,
 companies that treat and dispose of hazardous
chemicals,
 companies that operate treatment facilities for
municipalities or industries,

7. Where do environmental engineers work?
 government agencies that monitor and regulate
waste discharges,
 universities that teach and conduct research on
environmental control,
 private and government laboratories that
develop the new generations of pollution-control
systems,
 international agencies that transfer knowledge
and technology to the developing world, and
 public-interest groups that advocate
environmental protection.

8. What do environmental engineers know?
 Environmental engineers must have a strong
background in mathematics, physics, and chemistry.
 They learn engineering problem-solving and how to
work in teams to accomplish goals.
 They develop the ability to apply scientific principles
as part of making engineering decisions.
 Environmental engineers are skilled at analysis and
design, and they apply their knowledge to protect the
environment and human health.

9. What do environmental engineers know?
 The breadth and multidisciplinary nature of
environmental issues requires that
environmental engineers expand their skills
beyond the range normally associated with any
single engineering field.
 Depending upon their specific career goals,
environmental engineers gain knowledge and
skills in areas such as chemical technology,
geology, water and atmospheric chemistry,
microbiology, toxicology, hydrology, soil
science, computers, economics, and law.

10. Sources of Energy
Renewable and nonrenewable sources
 Renewable: tidal forces, wind, falling water,
thermal gradient in the ocean, geothermal heat,
solar input, biomass (wood, animal refuse,
vegetable matter, etc.)
 Nonrenewable: fossil fuels (oil, natural gas,
coal), radioactive minerals (uranium and
thorium)

11. Sources of Energy
 The world faces substantial increases in energy
consumption, particularly in less developed
areas Production of energy brings with it
environmental disturbances
Whatever the source, more energy means
more pollution

12.  surface- and ground- water hydrology
 water quality contamination
 municipal water and waste water treatment
 hazardous waste management and
treatment
 air pollution

13. A first Water Quality
Engineering Problem
 1854, outbreak of cholera in London
 10,000 deaths
 John Snow mapped victims addresses
 Convinced city official to remove pump
handle

14. Water Treatment Plants
Boulder, CO

15. How the Waste Water
Treatment Plant Works

16. Waste Water Treatment Plants
San Jose, CA
Portland, OR
Boulder, CO
Seattle, WA

17. 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

18. 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

19. Clear Day
Hazy Day

20. Rocky Mountain National Park

21. Yosemite Valley National Park

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

23. We’ve come a long
way baby???

24. Early
1900s,
NY
City

25. Downtown Los Angeles, December 31, 1993

26. Kuwait, August 1990
Kuwait, February 1991

27. 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.
3 April 2002

28. 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
www.aqmd.gov/news1/50th_photos.htm

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

30. 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
 HAPS: Reduction of hazardous air pollutant
emissions (carcinogens, teratogens, etc.)
 BIOMASS COMBUSTION: Exposure of women and
children to emissions from biomass cook stoves in
rural areas in developing countries

31. Environmental engineering is a great choice for
you and for society. Institute of Environmental
Engineering management Professors & staff
wishes you success.
We are looking forward to seeing you in our
classes and laboratories.
Wish you best of Luck
Thank you