Pour-flush toilets with biogas plant at DSK Training Institute, Gujarat, India - Draft - Case study of sustainable sanitation projects WAFLER, M., HEEB, J. and OLT, C. (2009): Pour-flush toilets with biogas plant at DSK Training Institute, Gujarat, India - Draft - Case study of sustainable sanitation projects. Basel (Switzerland): seecon gmbh. URL [Accessed: 17.06.2018] PDF