The last week of December saw a major milestone, as our first batch of feces was dried solely by the combustion of previously-dried feces on the current Beta system set-up in our lab at RTI!
Our feces combustor, engineered by our partners at Colorado State University, is shown running semi-automated; National Instruments’ LabVIEW controls the pressure differential through the system and displays/records temperature data as “fuel” (dried human feces) is manually metered into the combustion chamber using two ball valves as an air-lock.
The heat from combustion is used to dry the human feces applied to the cast-iron automated rotating plate inside the dryer apparatus.
Next, we begin working toward a fully-automated, fully-closed loop in which feces is dried, scraped and ground, then metered into the combustion chamber for burning.
One of the core responsibilities of RTI’s system, now under development, is to separate liquid waste from solid waste. Once separated, the solid waste is then convectively dried and delivered to a combustion system. The waste heat from the combustion system is converted to electricity using thermoelectric modules which, in turn, power the entire toilet.
We are happy to announce the that our alpha system, currently housed on CEPT campus in Ahmedabad, has produced real dried poop pellets and successfully completed a full burn, incinerating them!
This is quite the milestone for our project and we couldn’t be happier for reaching it!