Shear extrusion to treat fecal waste (viscous heating effect on deactivation of helminth eggs)
2011 - 2014 • Oklahoma State University Foundation, University of Missouri, Kansas City
Purpose
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.
Activities
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.
Countries of activity
Location of main activity
Objectives
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.
Filter tags
Bill & Melinda Gates Foundation Faecal sludge treatment processes Fundamental research and engineering Global North America Product design and engineering Sub-Saharan Africa Treatment of faecal sludge Treatment of wastewater or greywater University, education or research institution
Links
Uploaded by:
Trevor Surridge (tmsinnovation)
