GIZ - Deutsche Gesellschaft für internationale Zusammenarbeit

GTZ is now GIZ - Deutsche Gesellschaft für Internationale Zusammenarbeit

Since 1 January 2011, GIZ has brought together under one roof the long-standing expertise of DED, GTZ and Inwent. For further information, go to www.giz.de.

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Themes > Sustainable infrastructure > Water > Sustainable sanitation - ecosan > Further information > Frequently Asked Questions

Contact person

For further information please contact:
Dr. Elisabeth von Münch
Tel: +49 6196 79-4221
Fax: +49 6196 79-804221
Email: ecosan@giz.de

Frequently Asked Questions (FAQs)

Questions about ecosan definition

  1. What does "ecosan" stand for and what is the principle behind it?
  2. What does "sanitation" comprise?
  3. What is the definition of an "ecosan" toilet?
  4. Is ecosan the same as "dry sanitation"?

Questions about the theory of ecosan

  1. Does ecosan always use urine diversion?
  2. What are the purposes of separating urine and faeces (urine diversion)?
  3. Are ecosan systems cheaper than conventional sanitation systems?
  4. What is the rate of return of an investment in sanitation?

Questions about urine-diversion dehydration toilets (UDDTs)

  1. What is urine diversion (UD) and urine diversion dehydration (UDD)?
  2. Where can I find design drawings for UDD toilets?
  3. Are UDD toilets also used in Muslim countries where water plays a special role in personal hygiene?

Practical questions about ecosan projects

  1. Are there any ecosan projects in my country?
  2. Do waterless urinals smell more than conventional water-flushed urinals?
  3. How much nitrogen and phosphorus (plant-available macronutrients) is contained in excreta?

Questions about the ecosan project in the GIZ Headquarter Building 1 in Eschborn, Germany

  1. Why does GIZ have waterless urinals and urine-diversion flush toilets in its Building 1?
  2. How do the urine-diversion flush toilets work?
  3. Is the collected urine being reused at the moment?
  4. Is it cost-effective to build several pipe networks for the separate collection of wastewater streams?


Contact person

For further information please contact:
Dr. Elisabeth von Münch
Tel: +49 6196 79-4221
Fax: +49 6196 79-804221
Email: ecosan@giz.de
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