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Wastewater As a Resource
African Water Week
May 27, 2014 Dakar, Senegal
Dr. Seneshaw Tsegaye
Assistant Professor
Patel Col...
Urban Policy & Governance
Social Resiliency and Health
Communicating Science in
Sustainable Communities
Urban Planning and...
In many countries of sub-Saharan Africa
sanitation coverage is below 50 percent
Public health
Wastewater
as a burden
Waste...
Sanitation can’t be looked separately:
Integration is a key
Source: CSIRO
Surface water
Demand
management
Leakage
manageme...
Copyright © 2009 International
Water Association
0%
20%
40%
60%
80%
100%
BOD5 Nitrogen Phosphorus Potassium
Percent
Laundr...
Copyright © 2009 International
Water Association
0%
20%
40%
60%
80%
100%
BOD5 Nitrogen Phosphorus Potassium
Percent
Laundr...
Billions
Less Developed Regions
More Developed Regions
Full-scale struvite production facility
West Boise Canada (Pharmer ...
Great ideas to recover
nutrient from water cycle, Durban
Fecal sludge into safe fertilizer: LaDePa machine
Entrepreneurs see the potential
India, Malawi…..
Collection, transport, treatment and reuse-system (GTZ,2009)
Copyright © 2009 International
Water Association
0%
20%
40%
60%
80%
100%
BOD5 Nitrogen Phosphorus Potassium
Percent
Laundr...
Business oriented solution,
Naivasha, Kenya
Business oriented solution: Lavatory and wastewater
treatment plant with insta...
NSWC, Kampala (Uganda): NAKIVUBO WASTE WATER TREATMENT PLANT CONSTRUCTION
AfDB Loan - treatment:
• 45,000 m3/day waste wat...
New Business Model for Water
Utilities- Hamburg Water Cycle
Business opportunities:
• Potential to recover and sell energy...
Heat exchanger in sewers
MITIGATION
Harvesting heat from sewers
Dalian-Xinghai (China) : Environment-friendly heating and ...
Copyright © 2009 International
Water Association
0%
20%
40%
60%
80%
100%
BOD5 Nitrogen Phosphorus Potassium
Percent
Laundr...
Copyright © 2009 International
Water Association
0%
20%
40%
60%
80%
100%
BOD5 Nitrogen Phosphorus Potassium
Percent
Laundr...
Fresh Water Supply
Waste Water
Small Water
Consuming
Industry
Fresh Water Source
Waste Water from
Durban City
Reuse of Wat...
Harvesting for agriculture
• 400M m3 treated wastewater used for agriculture in Beijing in
2010 (reduce peri-urban poverty...
We need to move away from
traditional thinking
Driver for water management
should be beneficiation –maximize
value added
W...
Seneshaw Tsegaye
seneshaw@mail.usf.edu
Thank You
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Wastewater as a Resource, by Dr. Seneshaw Tsegaye

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Presentation made by Dr. Seneshaw Tsegaye at Africa Water Week, 27 May 2014, in Dakar, Senegal.

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Transcript of "Wastewater as a Resource, by Dr. Seneshaw Tsegaye"

  1. 1. Wastewater As a Resource African Water Week May 27, 2014 Dakar, Senegal Dr. Seneshaw Tsegaye Assistant Professor Patel College of Global Sustainability UNIVERSITY OF SOUTH FLORIDA
  2. 2. Urban Policy & Governance Social Resiliency and Health Communicating Science in Sustainable Communities Urban Planning and Design Energy Systems Urban Water Urban Transport Patel College of Global Sustainability - Academic Areas
  3. 3. In many countries of sub-Saharan Africa sanitation coverage is below 50 percent Public health Wastewater as a burden Wastewater as a resource ?
  4. 4. Sanitation can’t be looked separately: Integration is a key Source: CSIRO Surface water Demand management Leakage management Stormwater/ Rainwater Used water recycling Greywater reuse Cascading water use Desalination Groundwater Energy & nutrient
  5. 5. Copyright © 2009 International Water Association 0% 20% 40% 60% 80% 100% BOD5 Nitrogen Phosphorus Potassium Percent Laundry/Bath Kitchen Feces Urine Uncontaminated Organic Matter Nutrients We need a new perspective on sanitation - Beneficiation
  6. 6. Copyright © 2009 International Water Association 0% 20% 40% 60% 80% 100% BOD5 Nitrogen Phosphorus Potassium Percent Laundry/Bath Kitchen Feces Urine Nutrients Think about Harvesting Nutrients from Wastewater
  7. 7. Billions Less Developed Regions More Developed Regions Full-scale struvite production facility West Boise Canada (Pharmer Engineering) Struvite as commercial fertilizer www.pharmereng.com 2013 (Ostara) Great ideas to recover nutrient from water cycle
  8. 8. Great ideas to recover nutrient from water cycle, Durban Fecal sludge into safe fertilizer: LaDePa machine
  9. 9. Entrepreneurs see the potential India, Malawi….. Collection, transport, treatment and reuse-system (GTZ,2009)
  10. 10. Copyright © 2009 International Water Association 0% 20% 40% 60% 80% 100% BOD5 Nitrogen Phosphorus Potassium Percent Laundry/Bath Kitchen Feces Urine Organic Matter We need a new perspective on sanitation - Beneficiation
  11. 11. Business oriented solution, Naivasha, Kenya Business oriented solution: Lavatory and wastewater treatment plant with installed biogas generation facility Public Toilet & Shower Cafe (Biogas for cooking)
  12. 12. NSWC, Kampala (Uganda): NAKIVUBO WASTE WATER TREATMENT PLANT CONSTRUCTION AfDB Loan - treatment: • 45,000 m3/day waste water • 15,200 kg/day BOD Energy production: Biogas holding tank: 2,900 m3 Combined biogas and heat power station: 2 x 280 kWh Source: NSWC / AfDB 2010 Thermal energy from groundwater MITIGATION Harvesting to provide greater security
  13. 13. New Business Model for Water Utilities- Hamburg Water Cycle Business opportunities: • Potential to recover and sell energy • Potential to recover and sell nutrients • Position of utility on the market as operator of decentralized treatment systems on district and household scale • Exporting technology and expertise to quick growing Asian cities • International consultancy Decentralized system with source separation/ Vacuum sanitation CHP
  14. 14. Heat exchanger in sewers MITIGATION Harvesting heat from sewers Dalian-Xinghai (China) : Environment-friendly heating and cooling
  15. 15. Copyright © 2009 International Water Association 0% 20% 40% 60% 80% 100% BOD5 Nitrogen Phosphorus Potassium Percent Laundry/Bath Kitchen Feces Urine Organic Matter Nutrients We need a new perspective on sanitation - Beneficiation
  16. 16. Copyright © 2009 International Water Association 0% 20% 40% 60% 80% 100% BOD5 Nitrogen Phosphorus Potassium Percent Laundry/Bath Kitchen Feces Urine Think about Reusing/Recycling H2O
  17. 17. Fresh Water Supply Waste Water Small Water Consuming Industry Fresh Water Source Waste Water from Durban City Reuse of Water [Reduction in Wastewater discharge @10%] [7% (47.50 Ml/d) of City’s Current Demand ] [Ehekwini Water Services: Build on PPP Concept] Entrepreneurs see the harvesting potential, Durban
  18. 18. Harvesting for agriculture • 400M m3 treated wastewater used for agriculture in Beijing in 2010 (reduce peri-urban poverty and improve food security)
  19. 19. We need to move away from traditional thinking Driver for water management should be beneficiation –maximize value added We need to harness the opportunities and make it work for all
  20. 20. Seneshaw Tsegaye seneshaw@mail.usf.edu Thank You
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