The U.S.-based company Sedron Technologies (formerly Janicki Bioenergy) presented in 2014 a prototype using combustion. Their process is a sewage sludge treatment system that produces drinking water and electrical energy as end products from sewage sludge. Manufactured by Sedron Technologies, the proof of concept model was funded by the Bill and Melinda Gates Foundation. The S100 prototype model can produce 10,800 liters of drinking water per day and 100 kW net electricity.  A larger model under development, the S200, is designed to handle the waste from 100,000 people, produce 86,000 liters of drinking water per day and 250 kW net output electricity.  These systems are designed to provide a "self-sustaining bioenergy" process.
The treatment process first involves boiling (or thermally drying) the sewage sludge, during which water vapor is boiled off and recovered. A dry sludge is left behind which is then combusted as fuel to heat a boiler. This boiler produces steam and the heat necessary for the boiling process. The steam is then used to generate electrical energy. Some of this electrical energy is used for the final water reverse osmosis purification stages to produce safe drinking water, and to power ancillary pumps, fans and motors. The process immediately uses the solid fuel it produces, and therefore the process does not make a solid fuel product as an end product.
A pilot project of Sedron Technologies' omni processor was installed in Dakar, Senegal, in 2015 and can now treat the fecal sludge of 50,000-100,000 people.