Biological techniques for the removal of gaseous pollutants such as hydrogen sulfide
(H2S) have proved to be effective, environmentally friendly, and economically
viable. However, when high concentrations of H2S are treated, the process is
severely restricted by the oxygen deficit in the liquid phase. The oxygen transfer
efficiency provided by a membrane diffuser is evaluated under typical pressure
and salinity conditions used for the biological treatment of H2S in biogas. The
optimal operating parameters for enhanced oxygen transfer were determined.
The addition of pure oxygen with a membrane diffuser to increase the oxygen
transfer rate and the use of a nonaqueous phase to improve oxygen transfer in a
bioscrubber system are also evaluated.
CitationRodriguez, G. [et al.]. Optimization of oxygen transfer through membrane diffusers for biological sweetening of biogas. "Chemical engineering and technology", 2013, vol. 36, núm. 3, p. 513-518.
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