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Low -Cost Plant Nutrients and Organic Matter Recovery from Human Urine in Terra Preta Sanitation Supported by: Deutscher Akademischer Austauschdienst (DAAD) and Arba Minch University 07-01-2010 to 10-31-2013 , Ralf Otterpohl |
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Combined Lactic Acid Fermentation and Vermi-humification Processes for Safe and More Efficient Recycling of Human Excreta in Terra Preta Sanitation Supported by: BMBF 10-01-2010 to 09-30-2013 , Ralf Otterpohl |
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Development of a continuous single chamber vermicomposting toilet with urine diversion for on-site application Supported by: TUHH Institut für Abwasserwirtschaft und Gewässerschutz 07-01-2006 to 07-01-2009 , Ralf Otterpohl |