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Stéphane Déchelotte - One of the best experts on this subject based on the ideXlab platform.
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Recovery comparisons--hot nitrogen Vs steam regeneration of toxic Dichloromethane from activated carbon beds in oil sands process.
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Pascaline Pré, Sylvain Giraudet, Laurent Le Coq, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of Dichloromethane from activated carbon bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of Dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of Dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of Dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of Dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of Dichloromethane.
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Recovery comparisons—Hot nitrogen Vs steam regeneration of toxic Dichloromethane from activated carbon beds in oil sands process
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of Dichloromethane from activated carbon bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of Dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of Dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of Dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of Dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of Dichloromethane.
Shivaji G Ramalingam - One of the best experts on this subject based on the ideXlab platform.
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Recovery comparisons--hot nitrogen Vs steam regeneration of toxic Dichloromethane from activated carbon beds in oil sands process.
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Pascaline Pré, Sylvain Giraudet, Laurent Le Coq, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of Dichloromethane from activated carbon bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of Dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of Dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of Dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of Dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of Dichloromethane.
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Recovery comparisons—Hot nitrogen Vs steam regeneration of toxic Dichloromethane from activated carbon beds in oil sands process
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of Dichloromethane from activated carbon bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of Dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of Dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of Dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of Dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of Dichloromethane.
Dick B. Janssen - One of the best experts on this subject based on the ideXlab platform.
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Metabolism of mono- and dihalogenated C1 and C2 compounds by Xanthobacter autotrophicus growing on 1,2-dichloroethane
Biodegradation, 2007Co-Authors: M Torz, Piet Wietzes, Venko Beschkov, Dick B. JanssenAbstract:The conversion of and toxic effects exerted by several mono- and dihalogenated C1 and C2 compounds on cultures of Xanthobacter autotrophicus GJ10 growing on 1,2-dichloroethane were investigated. Bromochloromethane, dibromomethane and 1-bromo-2-chloroethane were utilized by strain GJ10 in batch culture as a cosubstrate and sole carbon source. The rate of degradation of dihalomethanes by whole cells was lower than that of 1,2-dichloroethane, but a significant increase of the rate of dihalomethane biodegradation was observed when methanol or ethanol were added as a cosubstrate. Products of the degradation of several tested compounds by haloalkane dehalogenase were analyzed and a new metabolic pathway based on hydrolytic conversion to formaldehyde was proposed for the dihalomethanes. Strain GJ10 growing on 1,2-dichloroethane converted 2-fluoroethanol and 1-chloro-2-fluoroethane to 2-fluoroacetate, which was tolerated up to a concentration of 2.5 mM. On the basis of the results from batch cultures an inert (Dichloromethane), a growth-supporting (dibromomethane) and a toxic (1,2-dibromoethane) compound were selected for testing their effects on a continuous culture of strain GJ10 growing on 1,2-dichloroethane. The compounds were added as pulses to a steady-state chemostat and the response of the culture was followed. The effects varied from a temporary decrease in cell density for dibromomethane to severe toxicity and culture washout with 1,2-dibromoethane. Our results extend the spectrum of halogenated C1 and C2 compounds that are known to be degraded by strain GJ10 and provide information on toxic effects and transformation of compounds not serving as a carbon source for this bacterium.
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Dichloromethane utilization in a packed-bed reactor in the presence of various electron acceptors
Water Research, 2000Co-Authors: J. H. De Best, Dick B. Janssen, J Ultee, A Hage, Hj Doddema, W. HarderAbstract:Abstract Dichloromethane, added as sole source of carbon and energy, was utilized by microorganisms in a packed-bed reactor under carbon dioxide-, sulfate-, nitrate- and nitrite-reducing conditions. Only in the presence of nitrite (4 mM) was the transformation of Dichloromethane partly inhibited. The maximum transformation rate for Dichloromethane under carbon dioxide reducing conditions was 1.25 kg m −3 d −1 . Carbon dioxide, acetate and formate were detected as (intermediate) products of Dichloromethane transformation in the reactor, indicating that it was a fermentative process. Both acetate and formate, when formed, were further utilized. The type of microorganisms that utilized formate and acetate depended on the electron acceptor present in the reactor. When carbon dioxide was the only electron acceptor available, acetate and formate were utilized by methanogens as indicated by methane production. When sulfate, nitrate or nitrite were present in the reactor, acetate and formate were utilized by sulfate-, nitrate- or nitrite-reducing microorganisms, respectively. Inhibition of methanogens with 2-bromoethane sulfonic acid or of sulfate reduction with molybdate had no effect on the utilization of Dichloromethane in enrichment cultures from the reactor. Also the presence of nitrate or nitrite was not necessary for the transformation of Dichloromethane. These results suggested that neither methanogens nor sulfate-, nitrate- and nitrite-reducers were involved in the transformation of Dichloromethane but that these organisms only utilized acetate and formate, the products of Dichloromethane fermentation in the reactor.
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transformation kinetics of chlorinated ethenes by methylosinus trichosporium ob3b and detection of unstable epoxides by on line gas chromatography
Applied and Environmental Microbiology, 1996Co-Authors: Vlie J Van Hylckama, W De Koning, Dick B. JanssenAbstract:A rapid and accurate method for the determination of transformation kinetics of volatile organic substrates was developed. Concentrations were monitored by on-line gas chromatographic analysis of the headspace of well-mixed incubation mixtures. With this method, the kinetics of transformation of a number of C(inf1) and C(inf2) halogenated alkanes and alkenes by Methylosinus trichosporium OB3b expressing particulate methane monooxygenase or soluble methane monooxygenase (sMMO) were studied. Apparent specific first-order rate constants for cells expressing sMMO decreased in the order of Dichloromethane, vinyl chloride, cis-1,2-dichloroethene, trans-1,2-dichloroethene, 1,1-dichloroethene, trichloroethene, chloroform, and 1,2-dichloroethane. During the degradation of trichloroethene, cis-1,2-dichloroethene, trans-1,2-dichloroethene, and vinyl chloride, the formation of the corresponding epoxides was observed. The epoxide of vinyl chloride and the epoxide of trichloroethene, which temporarily accumulated in the medium, were chemically degraded according to first-order kinetics, with half-lives of 78 and 21 s, respectively. Cells expressing sMMO actively degraded the epoxide of cis-1,2-dichloroethene but not the epoxide of trans-1,2-dichloroethene. Methane and acetylene inhibited degradation of the epoxide of cis-1,2-dichloroethene, indicating that sMMO was involved.
Pierre Le Cloirec - One of the best experts on this subject based on the ideXlab platform.
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Recovery comparisons--hot nitrogen Vs steam regeneration of toxic Dichloromethane from activated carbon beds in oil sands process.
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Pascaline Pré, Sylvain Giraudet, Laurent Le Coq, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of Dichloromethane from activated carbon bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of Dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of Dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of Dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of Dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of Dichloromethane.
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Recovery comparisons—Hot nitrogen Vs steam regeneration of toxic Dichloromethane from activated carbon beds in oil sands process
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of Dichloromethane from activated carbon bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of Dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of Dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of Dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of Dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of Dichloromethane.
Olivier Baudouin - One of the best experts on this subject based on the ideXlab platform.
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Recovery comparisons--hot nitrogen Vs steam regeneration of toxic Dichloromethane from activated carbon beds in oil sands process.
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Pascaline Pré, Sylvain Giraudet, Laurent Le Coq, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of Dichloromethane from activated carbon bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of Dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of Dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of Dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of Dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of Dichloromethane.
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Recovery comparisons—Hot nitrogen Vs steam regeneration of toxic Dichloromethane from activated carbon beds in oil sands process
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of Dichloromethane from activated carbon bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of Dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of Dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of Dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of Dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of Dichloromethane.
