Microbial reduction of SO sub 2 and NO sub x as a means of by-product recovery/disposal from regenerable processes for the desulfurization of flue gas
For the past five years Combustion Engineering (CE) and, since 1986, the University of Tulsa (TU) have been investigating the oxidation of H{sub 2}S by the facultatively anaerobic and autotrophic bacterium Thiobacillus denitrificans and have developed a process concept for the microbial removal of H{sub 2}S from a gas stream. In 1987/88 we demonstrated that the sulfate reducing bacterium, Desulfovibrio desulfuricans, can be grown anaerobically in mixed, septic cultures using SO{sub 2} and glucose. The simultaneous removal of SO{sub 2} and NO by D. desulfuricans and T. denitrifications co-cultures and cultures in series was demonstrated but is not feasible at this time. Microbial reduction of SO{sub 2} is a viable process concept for by-product recovery from desulfurization. In addition it has also been demonstrated that T. denitrificans can be grown anaerobically on NO(g). Therefore, microbial reduction of NO{sub x} is a viable process concept for the disposal of concentrated streams of NO{sub x} as may be produced by certain regenerable processes for the removal of SO{sub 2} and NO{sub x} from flue gas. Current progress includes work on a number of batch experiments using D. desulfuricans working cultures using municipal sludge as a carbon and energy source. It was found that the addition of yeast extract stimulates H{sub 2}S production. 19 refs., 4 figs., 15 tabs.
- Research Organization:
- Tulsa Univ., OK (USA). Center for Environmental Research and Technology
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FG22-90PC90096
- OSTI ID:
- 6240862
- Report Number(s):
- DOE/PC/90096-1; ON: DE91008406
- Country of Publication:
- United States
- Language:
- English
Similar Records
Simultaneous combined microbial removal of sulfur dioxide and nitric oxide from a gas stream
(1) Microbial removal of SO sub 2 and NO sub x from flue gas; (2) Microbial by-product recovery from regenerable processes for the simultaneous removal of SO sub 2 and NO sub x from flue gas
Related Subjects
20 FOSSIL-FUELED POWER PLANTS
59 BASIC BIOLOGICAL SCIENCES
FLUE GAS
DENITRIFICATION
DESULFURIZATION
HYDROGEN SULFIDES
YIELDS
NITROGEN OXIDES
REDUCTION
SULFUR DIOXIDE
BACTERIA
BIOCHEMICAL REACTION KINETICS
BIOREACTORS
BY-PRODUCTS
CARBON DIOXIDE
CULTURE MEDIA
FLOCCULATION
HOT GAS CLEANUP
HYDROGEN
MATERIALS RECOVERY
PROGRESS REPORT
SEWAGE SLUDGE
STOICHIOMETRY
SULFATE-REDUCING BACTERIA
YEASTS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DOCUMENT TYPES
ELEMENTS
EUMYCOTA
FUNGI
GASEOUS WASTES
HYDROGEN COMPOUNDS
KINETICS
MANAGEMENT
MICROORGANISMS
NITROGEN COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLANTS
PRECIPITATION
PROCESSING
PURIFICATION
REACTION KINETICS
RECOVERY
SEPARATION PROCESSES
SEWAGE
SLUDGES
SULFIDES
SULFUR COMPOUNDS
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
550700 - Microbiology