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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