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Microbial Reduction Of So2 And No3 As A Means Of By Product Recovery Disposal From Regenerable Processes For The Desulfurization Of Flue Gas Technical Progress Report June 11 1992 September 11 1992
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Book Synopsis Microbial Reduction of SO2 and NO3 as a Means of By- Product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Technical Progress Report, June 11, 1992--September 11, 1992 by :
Download or read book Microbial Reduction of SO2 and NO3 as a Means of By- Product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Technical Progress Report, June 11, 1992--September 11, 1992 written by and published by . This book was released on 1992 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the work described simultaneous SO2/Nox removal from flue gas based on direct contact of the gas with SRB and T. denitrificans co-cultures or cultures-in-series has been eliminated as a viable process concept at this time. The technical reasons are as follows: (1) NO inhibition of SO2 reduction by D. desulfuricans - Although the NO concentrations used in the experiments described above are somewhat higher than that found in a typical flue gas, it is quite possible that at lower NO concentrations (or partial pressures) the inhibiting effects will simply take longer to become apparent. (2) Nitrate suppression of NO removal - As noted previously, the cultivation of T. denitrificans in a microbial flue gas treatment system (either one or two stages) would require sulfide-limiting conditions. Therefore, the electron acceptor must be in excess, requiring nitrate in the T. denitrificans process culture. As shown in experiments described above, nitrate significantly suppresses the removal of NO from a feed gas making simultaneous SO2/NOx removal impractical by microbial means. (3) O2 inhibition of SO2 and NO reduction - It has been demonstrated that D. desulfuricans working cultures are tolerant of up to 1.7% O2 in the feed gas. However, further increases in the O2 partial pressure in the feed gas resulted in O2 inhibition of SO2 reduction. These inhibiting levels of O2 are comparable to those concentrations found in flue gases (3). Therefore, in any process in which raw flue gas contacts a D. desulfuricans culture marginal stability at best can be expected.
Book Synopsis Microbial Reduction of SO2 and NO3 as a Means of By-product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Technical Progress Report, September 11, 1992--December 11, 1992 by :
Download or read book Microbial Reduction of SO2 and NO3 as a Means of By-product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Technical Progress Report, September 11, 1992--December 11, 1992 written by and published by . This book was released on 1992 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the continual increase in the utilization of high sulfur and high nitrogen containing fossil fuels, the release of airborne pollutants into the environment has become a critical problem. The fuel sulfur is converted to SO2 during combustion. Fuel nitrogen and a fraction of the nitrogen from the combustion air are converted to nitric oxide and nitrogen dioxide, NO3 For the past five years Combustion Engineering (now Asea Brown Boveri or ABB) and, since 1986, the University of Tulsa (TU) have been investigating the oxidation of H2S by the facultatively anaerobic and autotrophic bacterium Thiobacillus denitrificans and have developed a process, concept for the microbial removal of H2S from a gas stream the simultaneous removal of SO2 and NO by D. desulfuricans and T. denitrificans co-cultures and cultures-in-series was demonstrated. These systems could not be sustained due to NO inhibition of D. desulfuricans. However, a preliminary economic analysis has shown that microbial reduction of SO2 to H2S with subsequent conversion to elemental sulfur by the Claus process is both technically and economically feasible if a less expensive carbon and/or energy source can be found. It has also been demonstrated that T. denitrificans can be grown anaerobically on NO(g) as a terminal electron acceptor with reduction to elemental nitrogen. Microbial reduction of NO3 is a viable process concept for the disposal of concentrated streams of NO3 as may be produced by certain regenerable processes for the removal of SO2 and NO3 from flue gas.
Book Synopsis Microbial Reduction of SO2 and NO3 as a Means of By- Product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Technical Progress Report, September 11, 1991--December 11, 1992 by :
Download or read book Microbial Reduction of SO2 and NO3 as a Means of By- Product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Technical Progress Report, September 11, 1991--December 11, 1992 written by and published by . This book was released on 1992 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of the authors̀ work on microbial reduction of flue gases is provided. The work begins with a discussion of efforts preceding the current project, then reviews the progress made in earlier periods of the project and concludes with a report of progress made in the current reporting period, September 11, 1991 to December 11, 1992.
Book Synopsis Microbial Reduction of SO2 and NO3 as a Means of By-product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Technical Progress Report, December 11, 1992--March 11, 1993 by :
Download or read book Microbial Reduction of SO2 and NO3 as a Means of By-product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Technical Progress Report, December 11, 1992--March 11, 1993 written by and published by . This book was released on 1993 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the potential of sulfate reducing bacteria to fix sulfur derived from flue gas desulfurization. The first section reviews the problem, the second section reviews progress of this study to use desulfovibrio desulfuricans for this purpose. The final section related progress during the current reporting period. This latter section describes studies to immobilize the bacteria in co-culture with floc-forming anaerobes, use of sewage sludges in the culture media, and sulfate production from sulfur dioxide.
Book Synopsis Microbial Reduction of SO2 and NO3 as a Means of By-product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Technical Progress Report, March 11, 1993--June 11, 1993 by :
Download or read book Microbial Reduction of SO2 and NO3 as a Means of By-product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Technical Progress Report, March 11, 1993--June 11, 1993 written by and published by . This book was released on 1993 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are two basic approaches to addressing the problem of SO2 and NOx emissions: (1) desulfurize (and denitrogenate) the feedstock prior to or during combustion; or (2) scrub the resultant SO2 and oxides of nitrogen from the boiler flue gases. The flue gas processing alternative has been addressed in this project via microbial reduction of SO2 and NOx by sulfate-reducing bacteria.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microbial Reduction of SO2 and NO3 as a Means of By-product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Final Report by :
Download or read book Microbial Reduction of SO2 and NO3 as a Means of By-product Recovery/disposal from Regenerable Processes for the Desulfurization of Flue Gas. Final Report written by and published by . This book was released on 1994 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this research was to investigate microorganisms capable of fossil fuel flue gas desulfurization and denitrification. The study used municipal sewage sludge as a carbon and energy source for SO2-reducing cultures. The individual tasks developed a consortium of sulfate-reducing bacteria, investigated the design parameters for a continuous process, preformed a cost analysis, and screened sulfate-reducing bacteria. In the investigation of microbial reduction of NOx to nitrogen, tasks included screening denitrifying bacteria for NO and NO2 activity, developing optimum NO-reducing cultures, and investigating design parameters for a continuous system. This final report reviews the work previous to the current project, describes project objectives and the specific work plan, and reports results from the work completed during the previous reporting periods.
Book Synopsis Microbial Reduction of SO2 and NO(subscript X) as a Means of By-product Recovery by :
Download or read book Microbial Reduction of SO2 and NO(subscript X) as a Means of By-product Recovery written by and published by . This book was released on 1993 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the potential of sulfate reducing bacteria to fix sulfur derived from flue gas desulfurization. The first section reviews the problem, the second section reviews progress of this study to use desulfovibrio desulfuricans for this purpose. The final section related progress during the current reporting period. This latter section describes studies to immobilize the bacteria in co-culture with floc-forming anaerobes, use of sewage sludges in the culture media, and sulfate production from sulfur dioxide.
Author :United States. Environmental Protection Agency. Office of Research and Development. Prototype Demonstration Facility Publisher : ISBN 13 : Total Pages :22 pages Book Rating :4.0/5 ( download)
Book Synopsis Wellman-Lord SO2 Recovery Process-flue Gas Desulfurization Plant by : United States. Environmental Protection Agency. Office of Research and Development. Prototype Demonstration Facility
Download or read book Wellman-Lord SO2 Recovery Process-flue Gas Desulfurization Plant written by United States. Environmental Protection Agency. Office of Research and Development. Prototype Demonstration Facility and published by . This book was released on 1977 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1995 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microbial Reduction of SO[sub 2] and NO[sub X] as a Means of By- Product Recovery by :
Download or read book Microbial Reduction of SO[sub 2] and NO[sub X] as a Means of By- Product Recovery written by and published by . This book was released on 1992 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of the author's work on microbial reduction of flue gases is provided. The work begins with a discussion of efforts preceding the current project, then reviews the progress made in earlier periods of the project and concludes with a report of progress made in the current reporting period, September 11, 1991 to December 11, 1992.
Book Synopsis Microbial Reduction of SO2 and NOsub X as a Means of By-product Recovery by :
Download or read book Microbial Reduction of SO2 and NOsub X as a Means of By-product Recovery written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Byproduct Recovery written by and published by . This book was released on 1997 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 170 wet scrubber systems applied, to 72,000 MW of U.S., coal-fired, utility boilers are in operation or under construction. In these systems, the sulfur dioxide removed from the boiler flue gas is permanently bound to a sorbent material, such as lime or limestone. The sulfated sorbent must be disposed of as a waste product or, in some cases, sold as a byproduct (e.g. gypsum). Due to the abundance and low cost of naturally occurring gypsum, and the costs associated with producing an industrial quality product, less than 7% of these scrubbers are configured to produce usable gypsum (and only 1% of all units actually sell the byproduct). The disposal of solid waste from each of these scrubbers requires a landfill area of approximately 200 to 400 acres. In the U.S., a total of 19 million tons of disposable FGD byproduct are produced, transported and disposed of in landfills annually. The use of regenerable sorbent technologies has the potential to reduce or eliminate solid waste production, transportation and disposal. In a regenerable sorbent system, the sulfur dioxide in the boiler flue gas is removed by the sorbent in an adsorber. The S02s subsequently released, in higher concentration, in a regenerator. All regenerable systems produce an off-gas stream from the regenerator that must be processed further in order to obtain a salable byproduct, such as elemental sulfur, sulfuric acid or liquid S02.
Download or read book Advanced Product Recovery written by and published by . This book was released on 1996 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 170 wet scrubber systems applied to 72,000 MW of US, coal-fired, utility boilers are in operation or under construction. In these systems, the sulfur dioxide removed form the boiler flue gas is permanently bound to a sorbent material, such as lime or limestone. The sulfated sorbent must be disposed of as a waste product or, in some cases, sold as a byproduct (e.g. gypsum). The use of regenerable sorbent technologies has the potential to reduce or eliminate solid waste production, transportation and disposal. Arthur D. Little, Inc., together with its industry and commercialization advisor, Engelhard Corporation, and its university partner, Tufts, plans to develop and scale-up an advanced, byproduct recovery technology that is a direct, catalytic process for reducing sulfur dioxide to elemental sulfur. The principal objective of the Phase 1 program is to identify and evaluate the performance of a catalyst which is robust and flexible with regard to choice of reducing gas. In order to achieve this goal, they have planned a structured program including: market/process/cost/evaluation; lab-scale catalyst preparation/optimization studies; lab-scale, bulk/supported catalyst kinetic studies; bench-scale catalyst/process studies; and utility review. This catalytic process reduces SO2 over a fluorite-type oxide (such as ceria and zirconia). The catalytic activity can be significantly promoted by active transition metals, such as copper. This type of mixed metal oxide catalyst has stable activity, high selectivity for sulfur production, and is resistant to water and carbon dioxide poisoning.
Download or read book Advanced Byproduct Recovery written by and published by . This book was released on 1996 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 170 wet scrubber systems applied, to 72,000 MW of U.S., coal-fired, utility boilers are in operation or under construction. In these systems, the sulfur dioxide removed from the boiler flue gas is permanently bound to a sorbent material, such as lime or limestone. The sulfated sorbent must be disposed of as a waste product or, in some cases, sold as a byproduct (e.g. gypsum). Due to the abundance and low cost of naturally occurring gypsum, and the costs associated with producing an industrial quality product, less than 7% of these scrubbers are configured to produce usable gypsum (and only 1% of all units actually sell the byproduct). The disposal of solid waste from each of these scrubbers requires a landfill area of approximately 200 to 400 acres. In the U.S., a total of 19 million tons of disposable FGD byproduct are produced, transported and disposed of in landfills annually. The use of regenerable sorbent technologies has the potential to reduce or eliminate solid waste production, transportation and disposal. In a regenerable sorbent system, the sulfur dioxide in the boiler flue gas is removed by the sorbent in an adsorber. The S02s subsequently released, in higher concentration, in a regenerator. All regenerable systems produce an off-gas stream from the regenerator that must be processed further in order to obtain a salable byproduct, such as elemental sulfur, sulfuric acid or liquid S02.
Book Synopsis Combined SO2/NO3 Reduction Technology by :
Download or read book Combined SO2/NO3 Reduction Technology written by and published by . This book was released on 1992 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enactment of the Clean Air Act Amendments and passage of state legislation leading to more stringent nitrogen oxides (NO3 regulations have fueled research and development efforts on technologies for the combined control of sulfur dioxide (SO2) and NO3 The integrated removal of both SO2 and NO3 in a single system can offer significant advantages over the use of several separate processes, including such factors as reduced system complexity, better operability, and lower costs. This paper reviews the status of a number of integrated flue-gas-cleanup (FGC) systems that have reached a significant stage of development, focusing on post-combustion processes that have been tested or are ready for testing at the pilot scale or larger. A brief process description, a summary of the development status and performance achieved to date, pending commercialization issues, and process economics (when available) are given for each technology.
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