Most odor escapes in the exhaust during the waste drying phase in the form of sulfide containing compounds. Odor treatment options have been tested and a combination of water vapor condensation and char adsorption eliminates the fecal odor. Biosorption is also being investigated. One benefit of pyrolysis is that the end product, char, no longer has a fecal odor since the volatile odor causing compounds are driven off due to the high temperatures achieved in the reactor.