* The material on this page was adapted from: Tilley, E. et al. (2008). [http://www.eawag.ch/organisation/abteilungen/sandec/publikationen/compendium/index_EN Compendium of Sanitation Systems and Technologies], published by [http://www.eawag.ch/organisation/abteilungen/sandec/index_EN Sandec], the Department of Water and Sanitation in Developing Countries of [http://www. eawag.ch/index_EN Eawag: The ], the Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
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