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Microbial Stabilization Of Sulfur Laden Sorbents Quarterly Technical Report March 1 1993 May 31 1993
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Book Synopsis Microbial Stabilization of Sulfur-laden Sorbents. [Quarterly] Technical Report, March 1, 1993--May 31, 1993 by :
Download or read book Microbial Stabilization of Sulfur-laden Sorbents. [Quarterly] Technical Report, March 1, 1993--May 31, 1993 written by and published by . This book was released on 1993 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clean coal technologies that involve limestone for in situ sulfur capture generate lime/limestone products laden with sulfur at various oxidation states. If sulfur is completely stabilized as sulfate, the spent sorbent is ready for commercial utilization as gypsum. However, the presence of reduced sulfur species requires additional processing. Thermal oxidation of reduced sulfur frequently results in undesirable release of SO2. Microbial oxidation might provide an inexpensive and effective alternative. Sorbents laden with reduced forms of sulfur such as sulfide or sulfite can serve as growth substrates for sulfur-oxidizing bacteria, which convert all sulfur to sulfate. The goals of this project are the following: (1) to optimize conditions for sulfate generation from sulfide, thiosulfate, and sulfite; (2) to test and optimize the effectiveness of microbial processing on spent sorbents from flue gas desulfurization, coal gasification, and fluidized bed combustion; (3) to search for hyperalkalinophilic thiobacilli, which would be effective up to pH 11. This quarter, temperature, nitrogen, and phosphate requirements for sulfate generation on thiosulfate were optimized with respect to two named strains and two promising isolates. Spent sorbents from three different power plants were tested for sulfite and thiosulfate contents, in preparation for bioprocessing.
Book Synopsis Rosenkräntzlein, bestehend in 9 Vatter unser und 9 Ave Maria, 9 Täg, oder 9 Mittwochen nach einander zu Ehren des H. Cajetani Tienne andächtig zu sprechen by :
Download or read book Rosenkräntzlein, bestehend in 9 Vatter unser und 9 Ave Maria, 9 Täg, oder 9 Mittwochen nach einander zu Ehren des H. Cajetani Tienne andächtig zu sprechen written by and published by . This book was released on 1800 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Stabilization of Sulfur-laden Sorbents. Final Technical Report, September 1, 1992--August 31, 1993 by :
Download or read book Microbial Stabilization of Sulfur-laden Sorbents. Final Technical Report, September 1, 1992--August 31, 1993 written by and published by . This book was released on 1993 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 spent sorbent is ready for commercial utilization as gypsum. However, the presence of reduced sulfur species requires additional processing. Thermal oxidation of reduced sulfur can result in undesirable release of SO2. Microbial oxidation might provide an inexpensive and effective alternative. Sorbents laden with reduced forms of sulfur such as sulfide or sulfite can serve as growth substrates for sulfur-oxidizing bacteria, which convert all sulfur to sulfate. The goals of this project are the following: (1) to optimize conditions for sulfate generation from sulfide, thiosulfate, and sulfite; (2) to test and optimize the effectiveness of microbial processing on spent sorbents from flue gas desulfurization, coal gasification, and fluidized bed combustion; (3) to search for hyperalkalinophilic thiobacilli, which would be effective up to pH 11.
Book Synopsis Microbial Stabilization of Sulfur-laden Sorbents. Technical Report, 1 December 1993--28 February 1994 by :
Download or read book Microbial Stabilization of Sulfur-laden Sorbents. Technical Report, 1 December 1993--28 February 1994 written by and published by . This book was released on 1994 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 SO2. 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.
Book Synopsis Microbial Stabilization of Sulfur-laden Sorbents. Technical Report, March 1, 1994--May 31, 1994 by :
Download or read book Microbial Stabilization of Sulfur-laden Sorbents. Technical Report, March 1, 1994--May 31, 1994 written by and published by . This book was released on 1994 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 spent sorbent is ready for commercial utilization as gypsum. However, the presence of reduced sulfur species requires additional processing. Thermal oxidation of reduced sulfur can result in undesirable release of SO2. 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 work continued with the solid phase of a spent slurry from an inhibited scrubber. The material was primarily CaSO3·1/2H2O. The authors did not detect growth of any bacterial strain in salts medium with the solid phase as the source of sulfur. However, unlike strains of Thiobacillus neapolitanus, the isolate TQ, was not inhibited by the solid phase. Evidence suggests that this organism grows slowly on low concentrations of sulfite.
Book Synopsis Microbial Stabilization of Sulfur-landen Sorbents ; Technical Report, September 1--November 30, 1993 by :
Download or read book Microbial Stabilization of Sulfur-landen Sorbents ; Technical Report, September 1--November 30, 1993 written by and published by . This book was released on 1993 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 spent sorbent is ready for commercial utilization as gypsum. However, the presence of reduced sulfur species requires additional processing. Thermal oxidation of reduced sulfur can result in undesirable release of SO2. 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 determining the combined effects of dibasic acids (DBA) and Ca{sup +2} concentration on several strains of neutrophilic thiobacilli, including Thiobacillus neapolitanus ATCC 23639 and ATCC 23641, and an isolate, TQ1, which was obtained from a commercial sulfur dioxide scrubber that utilizes DBA.
Book Synopsis Microbial Stabilization of Sulfur-laden Sorbents. Technical Report, December 1, 1992--February 29, 1993 by :
Download or read book Microbial Stabilization of Sulfur-laden Sorbents. Technical Report, December 1, 1992--February 29, 1993 written by and published by . This book was released on 1993 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clean coal technologies that involve limestone for in situ sulfur capture generate lime/limestone products laden with sulfur at various oxidation states. If sulfur is completely stabilized as sulfate, the spent sorbent is ready for commercial utilization as gypsum. However, the presence of reduced sulfur species requires additional processing. Thermal oxidation of reduced sulfur frequently results in undesirable release of SO2. Microbial oxidation may provide an inexpensive and effective alternative. Sorbents laden with reduced forms of sulfur such as sulfide or sulfite can serve as growth substrates for sulfur-oxidizing bacteria, which convert all sulfur to sulfate. The goals of this project are to optimize conditions for sulfate generation from sulfide and sulfite on prepared lime/limestone mixtures; to test and optimize the effectiveness of microbial processing on spent sorbents from coal gasification, in-duct sorbent injection, and fluidized bed combustion; and to search for hyperalkalinophilic thiobacilli, which would be effective up to pH 11. We report here progress toward controlling the pH of culture media, and determining the highest pH at which several environmental isolates and named strains could initiate sulfur oxidation.
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 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stabilization of Spent Sorbents from Coal Gasification. [Quarterly] Technical Report, March 1--May 31, 1993 by :
Download or read book Stabilization of Spent Sorbents from Coal Gasification. [Quarterly] Technical Report, March 1--May 31, 1993 written by and published by . This book was released on 1993 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this investigation is to determine the kinetics of reactions involving partially sulfided dolomite and oxygen, which is needed for the design of the reactor system for the stabilization of sulfide-containing solid wastes from gasification of high sulfur coals. During this quarter, samples of the partially sulfided dolomite were reacted with oxygen in the fluidized-bed reactor at different operating conditions. The test parameters included the effects of solid residence time, sorbent particle size, and reaction pressure. The reacted solids were analyzed to determine the extent of CaS conversion to CASO4. The results of these tests indicate that the rate of sulfation reaction increases with decreasing sorbent particle diameter and increasing pressure. Classical gas/solid reaction models, including the shrinking core model, the uniform conversion model, and the grainy pellet model, were applied to the experimental data of CaS sulfation. However, none of these models appears to be capable of predicting the measured CaS conversion with acceptable accuracy, indicating that these classical models should be modified to obtain better agreement between experimental and theoretical results.
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 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Attrition-resistant Zinc Titanate Sorbent for Sulfur. [Quarterly] Technical Report, March 1, 1993--May 31, 1993 by :
Download or read book An Attrition-resistant Zinc Titanate Sorbent for Sulfur. [Quarterly] Technical Report, March 1, 1993--May 31, 1993 written by and published by . This book was released on 1993 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the continuing search for good sorbent materials to remove sulfur from hot, coal-derived gases, zinc titanate sorbents have shown great promise. The objective of this project is to extend the work of prior investigators by developing improvements in the compressive strength and, therefore, the cycle life of these sorbents without a significant loss in chemical reactivity. During the third quarter, the preparation and properties of sorbents with a nominal composition of 50% Zn2TiO4 and 50% TiO2 were studied. In differential thermogravimetric tests of reactivity, specimens sintered at 850 and 900°C both gave two identical sulfidation-regeneration cycles. Specimens sintered at lower temperatures showed evidence of degradation during the second cycle. Materials of this composition had lower crush strengths than for the composition 75% Zn2TiO4 -- 25% TiO2 reported earlier, but higher values than reported by other investigators. Future work will include the preparation and properties of a lot of material with a coarser structure and larger pores, and microscopic studies on all three lots of material.
Book Synopsis Historical Painting Techniques, Materials, and Studio Practice by : Arie Wallert
Download or read book Historical Painting Techniques, Materials, and Studio Practice written by Arie Wallert and published by Getty Publications. This book was released on 1995-08-24 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridging the fields of conservation, art history, and museum curating, this volume contains the principal papers from an international symposium titled "Historical Painting Techniques, Materials, and Studio Practice" at the University of Leiden in Amsterdam, Netherlands, from June 26 to 29, 1995. The symposium—designed for art historians, conservators, conservation scientists, and museum curators worldwide—was organized by the Department of Art History at the University of Leiden and the Art History Department of the Central Research Laboratory for Objects of Art and Science in Amsterdam. Twenty-five contributors representing museums and conservation institutions throughout the world provide recent research on historical painting techniques, including wall painting and polychrome sculpture. Topics cover the latest art historical research and scientific analyses of original techniques and materials, as well as historical sources, such as medieval treatises and descriptions of painting techniques in historical literature. Chapters include the painting methods of Rembrandt and Vermeer, Dutch 17th-century landscape painting, wall paintings in English churches, Chinese paintings on paper and canvas, and Tibetan thangkas. Color plates and black-and-white photographs illustrate works from the Middle Ages to the 20th century.
Book Synopsis The Conservation of Cave 85 at the Mogao Grottoes, Dunhuang by : Neville Agnew
Download or read book The Conservation of Cave 85 at the Mogao Grottoes, Dunhuang written by Neville Agnew and published by Getty Publications. This book was released on 2014-02-01 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mogao Grottoes, a World Heritage Site in northwestern China, are located along the ancient caravan routes—collectively known as the Silk Road—that once linked China with the West. Founded by a Buddhist monk in the late fourth century, Mogao flourished over the following millennium, as monks, local rulers, and travelers commissioned hundreds of cave temples cut into a mile-long rock cliff and adorned them with vibrant murals. More than 490 decorated grottoes remain, containing thousands of sculptures and some 45,000 square meters of wall paintings, making Mogao one of the world’s most significant sites of Buddhist art. In 1997 the Getty Conservation Institute, which had been working with the Dunhuang Academy since 1989, began a case study using the Late–Tang dynasty Cave 85 to develop a methodology that would stabilize the deteriorating wall paintings. This abundantly illustrated volume is the definitive report on the project, which was completed in 2010.
Book Synopsis Ozone and Other Photochemical Oxidants by :
Download or read book Ozone and Other Photochemical Oxidants written by and published by National Academies. This book was released on 1977-01-01 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ocean Economy in 2030 written by OECD and published by OECD Publishing. This book was released on 2016-04-27 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report explores the growth prospects for the ocean economy, its capacity for future employment creation and innovation, and its role in addressing global challenges. Special attention is devoted to the emerging ocean-based industries.
Book Synopsis Controlling Disinfection By-products and Microbial Contaminants in Drinking Water by : Robert M. Clark
Download or read book Controlling Disinfection By-products and Microbial Contaminants in Drinking Water written by Robert M. Clark and published by DIANE Publishing. This book was released on 2001 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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