Carbon monoxide as an electron donor for the biological reduction of sulphate

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Several strains of Gram-negative and Gram-positive sulphate-reducing bacteria (SRB) are able to use carbon monoxide (CO) as a carbon source and electron donor for biological sulphate reduction. These strains exhibit variable resistance to CO toxicity. The most resistant SRB can grow and use CO as an electron donor at concentrations up to 100%, whereas others are already severely inhibited at CO concentrations as low as 1-2%. Here, the utilization, inhibition characteristics, and enzymology of CO metabolism as well as the current state of genomics of CO-oxidizing SRB are reviewed. Carboxydotrophic sulphate-reducing bacteria can be applied for biological sulphate reduction with synthesis gas (a mixture of hydrogen and carbon monoxide) as an electron donor. Copyright © 2010 Sofiya N. Parshina et al.




Parshina, S. N., Sipma, J., Henstra, A. M., & Stams, A. J. M. (2010). Carbon monoxide as an electron donor for the biological reduction of sulphate. International Journal of Microbiology.

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