RESUMO
Extreme acidophilic (pH ~ 0.25) microorganisms have been studied and applied to treat volatile sulfur emissions like carbon disulfide. These microorganisms provide opportunities for biomass control and recycling of sulfuric acid using extremely low pH operating conditions as shown in 70 L bench-scale bioreactors. Applying the extreme acidophilic bacteria in full-scale bioreactors treating carbon disulfide in combination with hydrogen sulfide emissions from industrial processes like the viscose industry was shown to be effective with average total sulfur removal efficiency above 90%.
Assuntos
Acidithiobacillus/metabolismo , Poluentes Atmosféricos/metabolismo , Reatores Biológicos/microbiologia , Dissulfeto de Carbono/metabolismo , Sulfeto de Hidrogênio/metabolismo , Poluição do Ar/prevenção & controle , Biodegradação Ambiental , Biomassa , Gases/metabolismo , Concentração de Íons de Hidrogênio , Oxirredução , Eliminação de Resíduos LíquidosRESUMO
This contribution reviews the mass transfer aspects of biotechnological processes for gas treatment, with an emphasis on the underlying principles and technical feasible methods for mass transfer enhancements. Understanding of the mass transfer behavior in bioreactors for gas treatment will result in improved reactor designs, reactor operation, and modeling tools, which are important to maximize efficiency and minimize costs. Various methods are discussed that show the potential for a more effective treatment of compounds with poor water solubility.