26. Water
•
Providing access to clean water is one of
the grand challenges for engineering, as
outlined by NAE in 2008
•
1.1 billion people worldwide lack access to
clean water; that’s 1/6th of the total
population
•
Water is not evenly distributed; some areas
have more freshwater, while some have
water scarcity
•
For e.g. Canada has more than it needs,
while middle east has severe shortage
•
Water challenges are also tied together with
energy challenges, and so it’s important to
maintain a sustainable water-energy nexus
28. Imagine how many accidents we would have if…
• Follow this sign to go
to Phoenix on I-10
• You will also find a
connection to
Wickenburg at AZ-60
• This route takes you to the
Sky Harbor airport on 143N
• Make sure you are not on
this lane if you don’t need to
go to the airport
• This exit takes you
to Broadway Rd
• But you will also be
able to go to 52nd
St if you need
36. Outline of today’s talk
•
•
•
•
•
•
Introduction
Literature Review
Materials and Methods
- Method 1
- Method 2
- Method 3
Results and Discussion
- Topic 1
- Topic 2
- Topic 3
Conclusions
Acknowledgments
37. Outline of today’s talk
•
•
•
•
•
•
Introduction
Literature Review
Materials and Methods
- Method 1
- Method 2
- Method 3
Results and Discussion
- Topic 1
- Topic 2
- Topic 3
Conclusions
Acknowledgments
38. Topics to be covered today...
1
Microbial fuel cells
for wastewater
treatment
39. Topics to be covered today...
1
Microbial fuel cells
for wastewater
treatment
2
Electrochemical
analyses of
anode-respiring
bacteria
40. Topics to be covered today...
1
Microbial fuel cells
for wastewater
treatment
2
Electrochemical
analyses of
anode-respiring
bacteria
3
OH- transport
limitations in
Pt/C cathodes
41.
42. “
1. Energy
2. Water
3. Food
4. Environment
5. Poverty
6. Terrorism & war
7. Disease
8. Education
9. Democracy
10.Population
Richard Smalley
45. Wastewater treatment is energy intensive
0.6 kWh/m3 of WW
Activated Sludge
Digester Heating/Mixing
Influent Pumping
Disinfection
Sludge Handling
Other
McCarty et al., ES&T, 2011
52. New revelations on respiratory behavior of
Geobacter sulfurreducens grown on electrodes
Sudeep C. Popat | Swette Center for Environmental Biotechnology | scp@asu.edu
53. Use schematics and animations... but wisely!
Liquid
Cathode
CS OHO2
CL
Diffusion Layer e-
j = nF(D/L)(Δ∆C)
54. Use schematics and animations... but wisely!
Liquid
Cathode
CS OHO2
CL
Diffusion Layer e-
j = nF(D/L)(Δ∆C)
For j = 10 A/m2,
Δ∆C = 0.1 M
55. Use schematics and animations... but wisely!
Liquid
Cathode
1.23 V
CS
OHO2
CL
Diffusion Layer e-
Nernst
Equation
j = nF(D/L)(Δ∆C)
For j = 10 A/m2,
Δ∆C = 0.1 M
60 mV
per pH unit
0.39 V
0
pH
14
56. Use schematics and animations... but wisely!
Liquid
Cathode
1.23 V
CS
OH-
j = nF(D/L)(Δ∆C)
O2
For j = 10 A/m2,
Δ∆C = 0.1 M
CL
Liquid
60 mV
per pH unit
0.39 V
Diffusion Layer e-
0
Cathode
0.1 M
Case 1:
Liquid pH 7
Nernst
Equation
10-7 M
Diffusion Layer
pH
14
57. Use schematics and animations... but wisely!
Liquid
Cathode
1.23 V
CS
OH-
j = nF(D/L)(Δ∆C)
O2
For j = 10 A/m2,
Δ∆C = 0.1 M
CL
Liquid
60 mV
per pH unit
0.39 V
Diffusion Layer e-
0
Cathode
0.1 M
Case 1:
Liquid pH 7
Nernst
Equation
pH 13
10-7 M
Diffusion Layer
pH
14
58. Use schematics and animations... but wisely!
Liquid
Cathode
1.23 V
CS
OH-
j = nF(D/L)(Δ∆C)
O2
For j = 10 A/m2,
Δ∆C = 0.1 M
CL
Liquid
60 mV
per pH unit
0.39 V
Diffusion Layer e-
0
Cathode
Liquid
0.1 M
Case 1:
Liquid pH 7
Nernst
Equation
pH 13
10-7 M
Diffusion Layer
0.1 M
pH
14
Cathode
0.2 M
Case 2:
Liquid pH 13
Diffusion Layer
59. Use schematics and animations... but wisely!
Liquid
Cathode
1.23 V
CS
OH-
j = nF(D/L)(Δ∆C)
O2
For j = 10 A/m2,
Δ∆C = 0.1 M
CL
Liquid
60 mV
per pH unit
0.39 V
Diffusion Layer e-
0
Cathode
Liquid
0.1 M
Case 1:
Liquid pH 7
Nernst
Equation
pH 13
10-7 M
Diffusion Layer
0.1 M
Case 2:
Liquid pH 13
pH
14
Cathode
0.2 M
pH
13.1
Diffusion Layer
60. “
The best design gets out of the way of
between the viewer’s brain and the
content.
”
- Edward Tufte
61. Do not use templates that waste a lot of space
62. Do not use templates that waste a lot of space
120. Sudeep C. Popat
Swette Center for Environmental Biotechnology
Biodesign Institute at Arizona State University
scp@asu.edu
121. Photo credits
Al Gore presenting photo - Paramount Classics
Steve Jobs presenting photo - Apple, Inc.
Planning photo - St. Lucie County, FL
Steve Jobs iPhone photo - Apple, Inc.
Anaerobic food web schematic - Angenent et al., Trends Biotechnol., 2004
Designer photo - Globe University
Walt Disney photo - The Walt Disney Company
Africa water pollution photo - E Staub/CDC
Richard Smalley photo - redOrbit
Phosphorus mining photo - Alexandra Pugachevsky
Mumbai air pollution photo - Romana Chapman/Indian Insights
Biosolids photo - Mid West Biosystems
Choose Vegetarianism billboard - Mercy for Animals
Method products photo - Method Products, pbc
Don’t Panic graphic - Buena Vista Pictures
Dance rehearsal photo - Noord Nederlandse
Al Gore photo - Paramount Classics
Richard Feynman photo - American Institute of Physics
Sir Ken Robinson photo - Ryan Lash/TED
Lots of books photo - Jess Mountifield
Todd Reubold photo - University of Minnesota
Nancy Duarte photo - Poptech
Jay Lehr photo - US Soy Bean Export Council
Michael Alley photo - Penn State
Susan McConnell photo - Stanford University
Jony Ive photo - Apple, Inc.
Several other images - Stock photos