The Experts below are selected from a list of 388422 Experts worldwide ranked by ideXlab platform
Abdeltif Amrane - One of the best experts on this subject based on the ideXlab platform.
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combined electrochemical treatment Biological Process for the removal of a commercial herbicide solution u46d
Separation and Purification Technology, 2014Co-Authors: Jean-marie Fontmorin, J. Siguié, Florence Fourcade, Florence Geneste, Didier Floner, Isabelle Soutrel, Abdeltif AmraneAbstract:Abstract The removal of a commercial solution of 2,4-D, U46D®, was carried out by coupling an electrochemical oxidation and a Biological Process involving activated sludge. The similar electrochemical behavior of 2,4-D and U46D® highlighted their oxidation around 1.6 V/SCE and the feasibility of an electrochemical pretreatment. It was based on a home-made flow cell involving bare graphite felt electrode. To propose a consistent mechanism for 2,4-D oxidation, the indirect determination of OH has been performed and the absence of radicals formation during 2,4-D electrolysis was confirmed. Consequently, the proposed pretreatment can be considered as a ‘direct’ electrochemical Process instead of an advanced electrochemical oxidation Process. The impact of the flow rate on the pretreatment showed that 3 mL min −1 was a good compromise between the pretreatment time and the electrolysis efficiency, since it led to an almost total degradation of the pollutant while its mineralization remained limited. At this flow rate and for 500 mg L −1 of 2,4-D, the energy cost was estimated at 5 kW h m −3 . The biodegradability of U46D® solution was not significantly modified after electrolysis, most likely due to the presence of dimethylamine salt in U46D®. Owing to the significant BOD 5 /COD ratio measured, a Biological treatment of the commercial U46D® solution was however considered. The electrochemical pretreatment shortened the duration of the biodegradation. For non-pretreated U46D® (100 mg L −1 2,4-D), mineralization remained limited until 6 days of culture (33.7% DOC removal), and total removal of the DOC was observed after 8 days. For pretreated U46D®, 63.7% decrease until the fifth day of culture was observed but total mineralization was not reached at the end of culture (72.1%). An overall mineralization yield during the coupled Process of 82.1% was therefore reached. The presence of refractory compounds generated during the electrochemical pretreatment in small concentration was therefore shown.
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Combined electrochemical treatment/Biological Process for the removal of a commercial herbicide solution, U46D
Separation and Purification Technology, 2014Co-Authors: Jean-marie Fontmorin, J. Siguié, Florence Fourcade, Florence Geneste, Didier Floner, Isabelle Soutrel, Abdeltif AmraneAbstract:The removal of a commercial solution of 2,4-D, U46D , was carried out by coupling an electrochemical oxidation and a Biological Process involving activated sludge. The similar electrochemical behavior of 2,4-D and U46D highlighted their oxidation around 1.6 V/SCE and the feasibility of an electrochemical pretreatment. It was based on a home-made flow cell involving bare graphite felt electrode. To propose a consistent mechanism for 2,4-D oxidation, the indirect determination of OH has been performed and the absence of radicals formation during 2,4-D electrolysis was confirmed. Consequently, the proposed pretreatment can be considered as a 'direct' electrochemical Process instead of an advanced electrochemical oxidation Process. The impact of the flow rate on the pretreatment showed that 3 mL min 1 was a good compromise between the pretreatment time and the electrolysis efficiency, since it led to an almost total degradation of the pollutant while its mineralization remained limited. At this flow rate and for 500 mg L 1 of 2,4-D, the energy cost was estimated at 5 kWh m 3. The biodegradability of U46D solution was not significantly modified after electrolysis, most likely due to the presence of dimethylamine salt in U46D . Owing to the significant BOD5/COD ratio measured, a Biological treatment of the commercial U46D solution was however considered. The electrochemical pretreatment shortened the duration of the biodegradation. For non-pretreated U46D (100 mg L 1 2,4-D), mineralization remained limited until 6 days of culture (33.7% DOC removal), and total removal of the DOC was observed after 8 days. For pretreated U46D , 63.7% decrease until the fifth day of culture was observed but total mineralization was not reached at the end of culture (72.1%). An overall mineralization yield during the coupled Process of 82.1% was therefore reached. The presence of refractory compounds generated during the electrochemical pretreatment in small concentration was therefore shown
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Tetracycline degradation and mineralization by the coupling of an electro-Fenton pretreatment and a Biological Process
Journal of Chemical Technology and Biotechnology, 2012Co-Authors: Fatiha Ferrag-siagh, Florence Fourcade, Isabelle Soutrel, Hamid Aït-amar, Hayet Djelal, Abdeltif AmraneAbstract:Studies on the degradation and mineralization of tetracycline by means of the electro-Fenton Process are lacking in the available literature. Its relevance as a pre-treatment prior to a Biological Process for the removal of tetracycline was therefore examined.
Jean-marie Fontmorin - One of the best experts on this subject based on the ideXlab platform.
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combined electrochemical treatment Biological Process for the removal of a commercial herbicide solution u46d
Separation and Purification Technology, 2014Co-Authors: Jean-marie Fontmorin, J. Siguié, Florence Fourcade, Florence Geneste, Didier Floner, Isabelle Soutrel, Abdeltif AmraneAbstract:Abstract The removal of a commercial solution of 2,4-D, U46D®, was carried out by coupling an electrochemical oxidation and a Biological Process involving activated sludge. The similar electrochemical behavior of 2,4-D and U46D® highlighted their oxidation around 1.6 V/SCE and the feasibility of an electrochemical pretreatment. It was based on a home-made flow cell involving bare graphite felt electrode. To propose a consistent mechanism for 2,4-D oxidation, the indirect determination of OH has been performed and the absence of radicals formation during 2,4-D electrolysis was confirmed. Consequently, the proposed pretreatment can be considered as a ‘direct’ electrochemical Process instead of an advanced electrochemical oxidation Process. The impact of the flow rate on the pretreatment showed that 3 mL min −1 was a good compromise between the pretreatment time and the electrolysis efficiency, since it led to an almost total degradation of the pollutant while its mineralization remained limited. At this flow rate and for 500 mg L −1 of 2,4-D, the energy cost was estimated at 5 kW h m −3 . The biodegradability of U46D® solution was not significantly modified after electrolysis, most likely due to the presence of dimethylamine salt in U46D®. Owing to the significant BOD 5 /COD ratio measured, a Biological treatment of the commercial U46D® solution was however considered. The electrochemical pretreatment shortened the duration of the biodegradation. For non-pretreated U46D® (100 mg L −1 2,4-D), mineralization remained limited until 6 days of culture (33.7% DOC removal), and total removal of the DOC was observed after 8 days. For pretreated U46D®, 63.7% decrease until the fifth day of culture was observed but total mineralization was not reached at the end of culture (72.1%). An overall mineralization yield during the coupled Process of 82.1% was therefore reached. The presence of refractory compounds generated during the electrochemical pretreatment in small concentration was therefore shown.
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Combined electrochemical treatment/Biological Process for the removal of a commercial herbicide solution, U46D
Separation and Purification Technology, 2014Co-Authors: Jean-marie Fontmorin, J. Siguié, Florence Fourcade, Florence Geneste, Didier Floner, Isabelle Soutrel, Abdeltif AmraneAbstract:The removal of a commercial solution of 2,4-D, U46D , was carried out by coupling an electrochemical oxidation and a Biological Process involving activated sludge. The similar electrochemical behavior of 2,4-D and U46D highlighted their oxidation around 1.6 V/SCE and the feasibility of an electrochemical pretreatment. It was based on a home-made flow cell involving bare graphite felt electrode. To propose a consistent mechanism for 2,4-D oxidation, the indirect determination of OH has been performed and the absence of radicals formation during 2,4-D electrolysis was confirmed. Consequently, the proposed pretreatment can be considered as a 'direct' electrochemical Process instead of an advanced electrochemical oxidation Process. The impact of the flow rate on the pretreatment showed that 3 mL min 1 was a good compromise between the pretreatment time and the electrolysis efficiency, since it led to an almost total degradation of the pollutant while its mineralization remained limited. At this flow rate and for 500 mg L 1 of 2,4-D, the energy cost was estimated at 5 kWh m 3. The biodegradability of U46D solution was not significantly modified after electrolysis, most likely due to the presence of dimethylamine salt in U46D . Owing to the significant BOD5/COD ratio measured, a Biological treatment of the commercial U46D solution was however considered. The electrochemical pretreatment shortened the duration of the biodegradation. For non-pretreated U46D (100 mg L 1 2,4-D), mineralization remained limited until 6 days of culture (33.7% DOC removal), and total removal of the DOC was observed after 8 days. For pretreated U46D , 63.7% decrease until the fifth day of culture was observed but total mineralization was not reached at the end of culture (72.1%). An overall mineralization yield during the coupled Process of 82.1% was therefore reached. The presence of refractory compounds generated during the electrochemical pretreatment in small concentration was therefore shown
Gamisans Noguera Javier - One of the best experts on this subject based on the ideXlab platform.
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Optimization of SO2 and NOx sequential wet absorption in a two-stage bioscrubber for elemental sulfur valorisation
2019Co-Authors: Guimerà Villalba Xavier, Dorado Castaño, Antonio David, Bonsfills Pedrós Anna, Gabriel Buguña David, Gamisans Noguera JavierAbstract:Removal of SO2 and NOX from flue gases has become an important issue in air pollution control. A two-stage bioscrubber based on a sequential wet absorption of SO2 and NOx followed by a two-stage Biological Process has been proposed in order to valorise SO2 and NOx by elemental sulphur production. Biological Process characterization established a maximum sulfate loading rate (5 kg S·m-3·d-1) and an optimal COD/S ratio (5.4 g O2·g S-1) in order to maximize elemental sulfur production and to avoid Biological Process limitations. Absorption of SO2 and NOx species is highly dependent on the absorption effluents compositions. In this sense, the success of the two-stage bioscrubber Process lies in an optimal sequential transfer of pollutants to the liquid. Differences in the solubility of pollutants enable the individual absorption of pollutants in two in-series scrubbers operated under different pH and residence time conditions. In addition, the use of secondary effluents from the reduction-oxidation Biological Process as absorbent was demonstrated as a key parameter to improve the efficiency and reduce operating costs.Peer Reviewe
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Optimization of SO2 and NOx sequential wet absorption in a two-stage bioscrubber for elemental sulfur valorisation
2019Co-Authors: Guimerà Villalba Xavier, Dorado Castaño, Antonio David, Bonsfills Pedrós Anna, Gabriel Buguña David, Gamisans Noguera JavierAbstract:Removal of SO2 and NOX from flue gases has become an important issue in air pollution control. A two-stage bioscrubber based on a sequential wet absorption of SO2 and NOx followed by a two-stage Biological Process has been proposed in order to valorise SO2 and NOx by elemental sulphur production. Biological Process characterization established a maximum sulfate loading rate (5 kg S·m-3·d-1) and an optimal COD/S ratio (5.4 g O2·g S-1) in order to maximize elemental sulfur production and to avoid Biological Process limitations. Absorption of SO2 and NOx species is highly dependent on the absorption effluents compositions. In this sense, the success of the two-stage bioscrubber Process lies in an optimal sequential transfer of pollutants to the liquid. Differences in the solubility of pollutants enable the individual absorption of pollutants in two in-series scrubbers operated under different pH and residence time conditions. In addition, the use of secondary effluents from the reduction-oxidation Biological Process as absorbent was demonstrated as a key parameter to improve the efficiency and reduce operating costs.Peer ReviewedPostprint (published version
Florence Fourcade - One of the best experts on this subject based on the ideXlab platform.
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combined electrochemical treatment Biological Process for the removal of a commercial herbicide solution u46d
Separation and Purification Technology, 2014Co-Authors: Jean-marie Fontmorin, J. Siguié, Florence Fourcade, Florence Geneste, Didier Floner, Isabelle Soutrel, Abdeltif AmraneAbstract:Abstract The removal of a commercial solution of 2,4-D, U46D®, was carried out by coupling an electrochemical oxidation and a Biological Process involving activated sludge. The similar electrochemical behavior of 2,4-D and U46D® highlighted their oxidation around 1.6 V/SCE and the feasibility of an electrochemical pretreatment. It was based on a home-made flow cell involving bare graphite felt electrode. To propose a consistent mechanism for 2,4-D oxidation, the indirect determination of OH has been performed and the absence of radicals formation during 2,4-D electrolysis was confirmed. Consequently, the proposed pretreatment can be considered as a ‘direct’ electrochemical Process instead of an advanced electrochemical oxidation Process. The impact of the flow rate on the pretreatment showed that 3 mL min −1 was a good compromise between the pretreatment time and the electrolysis efficiency, since it led to an almost total degradation of the pollutant while its mineralization remained limited. At this flow rate and for 500 mg L −1 of 2,4-D, the energy cost was estimated at 5 kW h m −3 . The biodegradability of U46D® solution was not significantly modified after electrolysis, most likely due to the presence of dimethylamine salt in U46D®. Owing to the significant BOD 5 /COD ratio measured, a Biological treatment of the commercial U46D® solution was however considered. The electrochemical pretreatment shortened the duration of the biodegradation. For non-pretreated U46D® (100 mg L −1 2,4-D), mineralization remained limited until 6 days of culture (33.7% DOC removal), and total removal of the DOC was observed after 8 days. For pretreated U46D®, 63.7% decrease until the fifth day of culture was observed but total mineralization was not reached at the end of culture (72.1%). An overall mineralization yield during the coupled Process of 82.1% was therefore reached. The presence of refractory compounds generated during the electrochemical pretreatment in small concentration was therefore shown.
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Combined electrochemical treatment/Biological Process for the removal of a commercial herbicide solution, U46D
Separation and Purification Technology, 2014Co-Authors: Jean-marie Fontmorin, J. Siguié, Florence Fourcade, Florence Geneste, Didier Floner, Isabelle Soutrel, Abdeltif AmraneAbstract:The removal of a commercial solution of 2,4-D, U46D , was carried out by coupling an electrochemical oxidation and a Biological Process involving activated sludge. The similar electrochemical behavior of 2,4-D and U46D highlighted their oxidation around 1.6 V/SCE and the feasibility of an electrochemical pretreatment. It was based on a home-made flow cell involving bare graphite felt electrode. To propose a consistent mechanism for 2,4-D oxidation, the indirect determination of OH has been performed and the absence of radicals formation during 2,4-D electrolysis was confirmed. Consequently, the proposed pretreatment can be considered as a 'direct' electrochemical Process instead of an advanced electrochemical oxidation Process. The impact of the flow rate on the pretreatment showed that 3 mL min 1 was a good compromise between the pretreatment time and the electrolysis efficiency, since it led to an almost total degradation of the pollutant while its mineralization remained limited. At this flow rate and for 500 mg L 1 of 2,4-D, the energy cost was estimated at 5 kWh m 3. The biodegradability of U46D solution was not significantly modified after electrolysis, most likely due to the presence of dimethylamine salt in U46D . Owing to the significant BOD5/COD ratio measured, a Biological treatment of the commercial U46D solution was however considered. The electrochemical pretreatment shortened the duration of the biodegradation. For non-pretreated U46D (100 mg L 1 2,4-D), mineralization remained limited until 6 days of culture (33.7% DOC removal), and total removal of the DOC was observed after 8 days. For pretreated U46D , 63.7% decrease until the fifth day of culture was observed but total mineralization was not reached at the end of culture (72.1%). An overall mineralization yield during the coupled Process of 82.1% was therefore reached. The presence of refractory compounds generated during the electrochemical pretreatment in small concentration was therefore shown
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Tetracycline degradation and mineralization by the coupling of an electro-Fenton pretreatment and a Biological Process
Journal of Chemical Technology and Biotechnology, 2012Co-Authors: Fatiha Ferrag-siagh, Florence Fourcade, Isabelle Soutrel, Hamid Aït-amar, Hayet Djelal, Abdeltif AmraneAbstract:Studies on the degradation and mineralization of tetracycline by means of the electro-Fenton Process are lacking in the available literature. Its relevance as a pre-treatment prior to a Biological Process for the removal of tetracycline was therefore examined.
Isabelle Soutrel - One of the best experts on this subject based on the ideXlab platform.
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combined electrochemical treatment Biological Process for the removal of a commercial herbicide solution u46d
Separation and Purification Technology, 2014Co-Authors: Jean-marie Fontmorin, J. Siguié, Florence Fourcade, Florence Geneste, Didier Floner, Isabelle Soutrel, Abdeltif AmraneAbstract:Abstract The removal of a commercial solution of 2,4-D, U46D®, was carried out by coupling an electrochemical oxidation and a Biological Process involving activated sludge. The similar electrochemical behavior of 2,4-D and U46D® highlighted their oxidation around 1.6 V/SCE and the feasibility of an electrochemical pretreatment. It was based on a home-made flow cell involving bare graphite felt electrode. To propose a consistent mechanism for 2,4-D oxidation, the indirect determination of OH has been performed and the absence of radicals formation during 2,4-D electrolysis was confirmed. Consequently, the proposed pretreatment can be considered as a ‘direct’ electrochemical Process instead of an advanced electrochemical oxidation Process. The impact of the flow rate on the pretreatment showed that 3 mL min −1 was a good compromise between the pretreatment time and the electrolysis efficiency, since it led to an almost total degradation of the pollutant while its mineralization remained limited. At this flow rate and for 500 mg L −1 of 2,4-D, the energy cost was estimated at 5 kW h m −3 . The biodegradability of U46D® solution was not significantly modified after electrolysis, most likely due to the presence of dimethylamine salt in U46D®. Owing to the significant BOD 5 /COD ratio measured, a Biological treatment of the commercial U46D® solution was however considered. The electrochemical pretreatment shortened the duration of the biodegradation. For non-pretreated U46D® (100 mg L −1 2,4-D), mineralization remained limited until 6 days of culture (33.7% DOC removal), and total removal of the DOC was observed after 8 days. For pretreated U46D®, 63.7% decrease until the fifth day of culture was observed but total mineralization was not reached at the end of culture (72.1%). An overall mineralization yield during the coupled Process of 82.1% was therefore reached. The presence of refractory compounds generated during the electrochemical pretreatment in small concentration was therefore shown.
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Combined electrochemical treatment/Biological Process for the removal of a commercial herbicide solution, U46D
Separation and Purification Technology, 2014Co-Authors: Jean-marie Fontmorin, J. Siguié, Florence Fourcade, Florence Geneste, Didier Floner, Isabelle Soutrel, Abdeltif AmraneAbstract:The removal of a commercial solution of 2,4-D, U46D , was carried out by coupling an electrochemical oxidation and a Biological Process involving activated sludge. The similar electrochemical behavior of 2,4-D and U46D highlighted their oxidation around 1.6 V/SCE and the feasibility of an electrochemical pretreatment. It was based on a home-made flow cell involving bare graphite felt electrode. To propose a consistent mechanism for 2,4-D oxidation, the indirect determination of OH has been performed and the absence of radicals formation during 2,4-D electrolysis was confirmed. Consequently, the proposed pretreatment can be considered as a 'direct' electrochemical Process instead of an advanced electrochemical oxidation Process. The impact of the flow rate on the pretreatment showed that 3 mL min 1 was a good compromise between the pretreatment time and the electrolysis efficiency, since it led to an almost total degradation of the pollutant while its mineralization remained limited. At this flow rate and for 500 mg L 1 of 2,4-D, the energy cost was estimated at 5 kWh m 3. The biodegradability of U46D solution was not significantly modified after electrolysis, most likely due to the presence of dimethylamine salt in U46D . Owing to the significant BOD5/COD ratio measured, a Biological treatment of the commercial U46D solution was however considered. The electrochemical pretreatment shortened the duration of the biodegradation. For non-pretreated U46D (100 mg L 1 2,4-D), mineralization remained limited until 6 days of culture (33.7% DOC removal), and total removal of the DOC was observed after 8 days. For pretreated U46D , 63.7% decrease until the fifth day of culture was observed but total mineralization was not reached at the end of culture (72.1%). An overall mineralization yield during the coupled Process of 82.1% was therefore reached. The presence of refractory compounds generated during the electrochemical pretreatment in small concentration was therefore shown
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Tetracycline degradation and mineralization by the coupling of an electro-Fenton pretreatment and a Biological Process
Journal of Chemical Technology and Biotechnology, 2012Co-Authors: Fatiha Ferrag-siagh, Florence Fourcade, Isabelle Soutrel, Hamid Aït-amar, Hayet Djelal, Abdeltif AmraneAbstract:Studies on the degradation and mineralization of tetracycline by means of the electro-Fenton Process are lacking in the available literature. Its relevance as a pre-treatment prior to a Biological Process for the removal of tetracycline was therefore examined.