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Photo:TomvanCakenberghe/IWMI
www.iwmi.org
Water for a food-secure world
The untapped potential of resource recovery and
re...
Wasted water
Missed
opportunities
• Potential RRR
• Actual RRR
– Unsafe reuse
– Success stories
Outline
Photo:NeilPalmer/IWMI
 Population increase (9 billion in 2050)
 Urbanization (now 50%, in 2050 66%)
Potential for RRR
 Changes in consumption...
 Municipal Wastewater: 330 km3/year
 Nutrients and Organic Carbon:
Resources potentially embedded in the globally produc...
Actual RRR
Source: Sato, et al. 2013 and AQUASTAT 2014
Wastewater treatment capacity
0
5
10
15
20
25
30
35
NumberofTreatmentPlants
Region
Business (e.g., hotel,
airport)
Hospital
Military
School
Municipal/To...
Direct and indirect reuse of untreated
wastewater
…Bright RRR cases
IWMI Approach: 60 case analysis, business models catalogue, feasibility
studies, piloting, up-scaling an...
Agriculture
• Water all year round
• Nutrients and organic matter
• Higher yields
• Closer to cities
• More crops/year
• H...
Business case: Agriquatics, Mirzapur
0.6 ha plug flow duckweed pond Farmed duckweed
Duckweed fertilized fish ponds Harvested fish
Business case: Agriquatics, M...
Wastewater Input: Wastewater from a complex of 3 000 p.e.
Value-added products: Carp Species, co-crops
Public acceptabilit...
99% Water
Valuable resources:
• Organic carbon
• Nitrogen
• Phosphorus
Hazards:
• Pathogens
• Dangerous
Chemicals
www.iwmi.org
Water for a food-secure world
Javier Mateo-Sagasta
Senior Researcher
j.mateo-sagasta@cigar.org
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The untapped potential of resource recovery and reuse: a global overview

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by Javier Mateo-Sagasta
Daegu, Korea, April 14, 2015

Published in: Science
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The untapped potential of resource recovery and reuse: a global overview

  1. 1. Photo:TomvanCakenberghe/IWMI www.iwmi.org Water for a food-secure world The untapped potential of resource recovery and reuse: a global overview Photo:NanaKofiAcquah/IWMI Javier Mateo-Sagasta Daegu, Korea, April 14, 2015
  2. 2. Wasted water Missed opportunities
  3. 3. • Potential RRR • Actual RRR – Unsafe reuse – Success stories Outline Photo:NeilPalmer/IWMI
  4. 4.  Population increase (9 billion in 2050)  Urbanization (now 50%, in 2050 66%) Potential for RRR  Changes in consumption patterns
  5. 5.  Municipal Wastewater: 330 km3/year  Nutrients and Organic Carbon: Resources potentially embedded in the globally produced municipal wastewater N (Tg/yr) P (Tg/yr) C (Tg/yr) 13.2 2.6 52.8 Note 1: Tg = Teragram = 109kg Note 2: assuming a medium strength wastewater with 40mgTN/l, 8mgTP/l and 160 mgTOC/l Potential for RRR Potential for RRR Source: Mateo-Sagasta et al. 2015. Springer  Energy: 46.2 km3 CH4 with a global caloric value of 1,660 109 MJ Note: assuming a medium strength wastewater with 160 mgTOC/l * Assuming 3,500 KWh used/household (World Energy Council 2013)
  6. 6. Actual RRR Source: Sato, et al. 2013 and AQUASTAT 2014 Wastewater treatment capacity
  7. 7. 0 5 10 15 20 25 30 35 NumberofTreatmentPlants Region Business (e.g., hotel, airport) Hospital Military School Municipal/Township Community-level (Source: Murray & Drechsel, 2011) WW treatment plants: how many of them are actually functional?
  8. 8. Direct and indirect reuse of untreated wastewater
  9. 9. …Bright RRR cases IWMI Approach: 60 case analysis, business models catalogue, feasibility studies, piloting, up-scaling and replication plans These and many more!
  10. 10. Agriculture • Water all year round • Nutrients and organic matter • Higher yields • Closer to cities • More crops/year • Higher incomes Cities • Food security • Additional wastewater treatment • Water exchange with agriculture Environment • Lower pollution • Freshwater conservation … RRR successful initiatives thant bring benefits to Photo:NanaKofiAcquah/IWMI
  11. 11. Business case: Agriquatics, Mirzapur
  12. 12. 0.6 ha plug flow duckweed pond Farmed duckweed Duckweed fertilized fish ponds Harvested fish Business case: Agriquatics, Mirzapur
  13. 13. Wastewater Input: Wastewater from a complex of 3 000 p.e. Value-added products: Carp Species, co-crops Public acceptability: High. Constant demand for fish Capital requirements: USD 100 000 plus existing 4 lagoons Labour requirements: 4 persons for 1 hour/day -7 days/week Output: 7.5 tonnes of carps at an average price of USD 3/kg Gain: 4 part time jobs, inexpensive source of fish and cleaner environment Viability indicators: payback period 6 years, gross margin 20% Status of firm: Operational (1989) Major partners: Prism Bangladesh (NGO) / Kumudini Welfare Trust Business case: Agriquatics, Mirzapur
  14. 14. 99% Water Valuable resources: • Organic carbon • Nitrogen • Phosphorus Hazards: • Pathogens • Dangerous Chemicals
  15. 15. www.iwmi.org Water for a food-secure world Javier Mateo-Sagasta Senior Researcher j.mateo-sagasta@cigar.org Thank you for your attention! Photo:GraemeWilliams/IWMI

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