A Better Toilet

For A Cleaner World

Solid Waste Drying and Sizing with Helical Auger

by | Aug 24, 2013 | 1 comment

The first stage of the solid waste processing module consists of an auger-based dryer/conveyer unit.

The auger is a helical screw device designed to move and dry the feces before converting it into solid fuel for combustion. Heat from the combustion process accelerates drying, while mechanical apertures along the auger length generate burnable sized pellets of uniform size. This video shows some preliminary sizing experiments performed using miso paste as a surrogate. Uniform sizing facilitates combustion and optimum energy conversion on the back end of the solid waste processing module.

1 Comment

  1. Brian Stoner

    This video highlights the importance of sizing the feces at a stage in the auger where it will keep its shape and continue to dry in discrete pellets. If it is cut and sized too soon, it will mash together with other pellets. Controlling the size of the dried feces will aid in the optimization of the combustion stage that follows.


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