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Urban nutrient recovery
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UNESCO-IHE: water education institute
160 Staff (54% Academic, 46% Non-academic)
250 Guest Faculty
4 Academic Programmes / 14 specializations:
- Water Sciences and Engineering - Environmental Sciences - Municipal Water and Infrastructure - Water Management
70 PhD fellows
200 MSc graduates annuallymainlymid-career professionals fromdeveloping countries; on a scholarship from Dutch government
400 Short Course participants annually
> 200 Publications / year
> 100 Projects / year
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Nutrient recovery from urban waste
Sources:
Human excreta
Grey water
Rainwater
Solid Waste
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Nutrient recovery from urban waste
Sources:
Human excreta
Grey water
Rainwater
Solid Waste
Urine:
N+P+K = fertilizer
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Nutrient recovery from urban waste
Sources:
Human excreta
Grey water
Rainwater
Solid Waste
Urine:
N+P+K = fertilizer
Faeces:
Great compostingvalue after drying
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Nutrient recovery from urban waste
Sources:
Human excreta
Grey water
Rainwater
Solid Waste
Irrigation, flushing
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Nutrient recovery from urban waste
Sources:
Human excreta
Grey water
Rainwater
Solid Waste
Irrigation; drinking water
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Nutrient recovery from urban waste
Sources:
Human excreta
Grey water
Rainwater
Solid Waste
Irrigation; drinking water
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Nutrient recovery from urban waste
Sources:
Human excreta
Grey water
Rainwater
Solid Waste Recyclables: economic value
Organics: compostable
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Nutrient recovery from urban waste
Sources:
Human excreta
Grey water
Rainwater
Solid Waste Recyclables: economic value
Organics: compostable
Digestion in a bioreactor
to make biogas
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Sketch of biodigester replacing a septic tank. Wastewater as well as kitchen and garden waste enter the digester and are broken down to
biogas and fertile water.
The advantages: No more emptying of septic tank. Reuse of all water in the garden. Less cost on cooking energy.
Source: Ecosan Online Course, Elisabeth von Muench, UNESCO-IHE
Feeding material:
- Wastewater
- Kitchen waste
- Garden waste
Household Energy from Sanitation
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Digesting waste: producing biogas
Constructing biogas plants:
New enterprises
New to develop enterprises: Operation & Maintenance!
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INTEGRATED approach!
http://www.wsp.org/
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http://www.duncanmarasanitation.blogspot.com/
No substitute for knowledge
The real IYS2008 challenge is how to get this
knowledge to those that really matter
Key to success?
Look for sustainability criteria: socially acceptable
technically appropriate
economically viable
not contributing to environmental degradation
or depletion of the resource base
protect and promote human health institutionally appropriate
Training of involved professionals
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