* The material on this page was adapted from[[Image: Tilley, E. et al. (2008)compendium. jpg|thumb|right|130px|[http://www.eawag.ch/organisation/abteilungen/sandec/publikationen/compendium/index_EN Download the Eawag 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 Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
[[ImageThe material on this page was adapted from:compendiumTilley, E. et al. (2008).jpg|thumb|right|130px|[http://www.eawag.ch/organisation/abteilungen/sandec/publikationen/compendium/index_EN Download the Eawag 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 Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
