Microbial stabilization of sulfur-laden sorbents. Technical report, 1 December 1993--28 February 1994
- Illinois State Univ., Normal, IL (United States)
Clean coal technologies that involve limestone for sulfur capture generate lime/limestone products laden with sulfur at various oxidation states. If sulfur is completely stabilized as sulfate, the spend sorbent is ready for commercial utilization as gypsum. However, the presence of reduced sulfur species required additional processing. Thermal oxidation of reduced sulfur can result in undesirable release of SO{sub 2}. Microbial oxidation might provide an inexpensive and effective alternative. Sorbents laden with reduced forms of sulfur such as sulfide, sulfite, or various polythionate species serve as growth substrates for sulfur-oxidizing bacteria, which have the potential to convert all sulfur to sulfate. This quarter, efforts focused on treating the aqueous phase of a waste sorbent obtained from an inhibited wet scrubbing process. Although two named strains, Thiobacillus neapolitanus ATCC 23639 and ATCC 23641, failed; the isolate TQ1 rapidly oxidized thiosalts, producing sulfate. The Virtis Fermentor arrived, so that experiments with TQ1 have been scaled up to 1.5 liters with temperature, aeration, and pH control.
- Research Organization:
- Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FC22-92PC92521
- OSTI ID:
- 10158572
- Report Number(s):
- DOE/PC/92521-T140; ON: DE94012567; BR: AV0100000/AV0102000; TRN: AHC29412%%70
- Resource Relation:
- Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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