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

Technical Report · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6240862

Sublette, K L

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

Related Subjects

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59 BASIC BIOLOGICAL SCIENCES
BACTERIA
BIOCHEMICAL REACTION KINETICS
BIOREACTORS
BY-PRODUCTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CULTURE MEDIA
DENITRIFICATION
DESULFURIZATION
DOCUMENT TYPES
ELEMENTS
EUMYCOTA
FLOCCULATION
FLUE GAS
FUNGI
GASEOUS WASTES
HOT GAS CLEANUP
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
KINETICS
MANAGEMENT
MATERIALS RECOVERY
MICROORGANISMS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLANTS
PRECIPITATION
PROCESSING
PROGRESS REPORT
PURIFICATION
REACTION KINETICS
RECOVERY
REDUCTION
SEPARATION PROCESSES
SEWAGE
SEWAGE SLUDGE
SLUDGES
STOICHIOMETRY
SULFATE-REDUCING BACTERIA
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
YEASTS
YIELDS