Shear extrusion to treat fecal waste (viscous heating effect on deactivation of helminth eggs) To develop a small-scale device in which an auger forces feces and other solid wastes device through a die that results in high temperatures and pressure that dewaters the waste and destroys microorganisms.
We have built and tested a laboratory scale device that can heat fecal and simulant materials up to 190C by friction generated between a rotating inner core and a fixed outer core. Current efforts focus on reclamation of water vaporized from the waste.
Mission
Our focus has been on sanitization of solid waste for subsequent safe use, handling and transportation. The energy input into the solids is by mechanical forces that results in the mass self heating by friction. The temperature rise is sufficient to allow water to leave as steam for condensation and reuse.Answer questions about the project
Filter / Tags
Product design and engineeringGlobalTreatment of wastewater or greywaterTreatment of faecal sludgeFaecal sludge treatment processesFundamental research and engineeringBill & Melinda Gates FoundationUniversity, education or research institution
Related Countries
South AfricaUnited States
Project location
