During gasification, various pollutants may be produced depending on the make-up of the waste feedstock. The feedstock can vary by plant from biomass, household waste (RDF, or even hazardous waste. The pollutants involved with these processes include sub-micron particulate matter, tars, ammonia, metals, dioxins and furans, and acid gases.


One of the primary challenges is cleaning the pollutants in the syngas to a level that is tolerated by the gas fermentation process. One of the advantages of the gas fermentation technology is that it is more flexible in terms of the purity of the syngas than the FT process.