AI Article Synopsis
- Hydrogen sulfide is a major problem in biogas production, causing toxicity and corrosion, and originates from agricultural and industrial waste.
- Biological desulfurization is favored over chemical methods due to its lower cost and lack of harmful byproducts.
- The process relies on sulfur-oxidizing bacteria, which utilize oxygen or oxidized nitrogen compounds to remove sulfides from gases or liquids.
Article Abstract
Hydrogen sulfide is widely known as the most undesirable component of biogas that caused not only serious sensoric and toxic problems, but also corrosion of concrete and steel structures. Many agricultural and industrial waste used in biogas production, may contain a large amount of substances that serve as direct precursors to the formation of sulfide sulfur-sources of hydrogen sulfide in the biogas. Biological desulfurization methods are currently promoted to abiotic methods because they are less expensive and do not produce undesirable materials which must be disposed of. The final products of oxidation of sulfides are no longer hazardous. Biological removal of sulfide from a liquid or gaseous phase is based on the activity of sulfur-oxidizing bacteria. They need an oxidizing agent such as an acceptor of electrons released during the oxidation of sulfides-atmospheric oxygen or oxidized forms of nitrogen. Different genera of sulfur-oxidizing bacteria and their technological application are discussed.
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| http://dx.doi.org/10.1016/j.biotechadv.2015.02.007 | DOI Listing |
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