The Experts below are selected from a list of 216 Experts worldwide ranked by ideXlab platform
F Lopez - One of the best experts on this subject based on the ideXlab platform.
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use of ozone and or uv in the treatment of effluents from Board Paper industry
Chemosphere, 2005Co-Authors: A M Amat, A Arques, Miguel A Miranda, F LopezAbstract:The aim of this work has been to study the viability of ozone and/or UV in the treatment of cardBoard industry effluents. Several model compounds have been chosen for the experiments: guaicol, eugenol, glucose, acetate and butyrate. Significant differences in the ozonisation rates are observed between phenolic products coming from lignin (eugenol and guaiacol) and aliphatic compounds. Reactions fit in all cases a pseudo-first order kinetics and are influenced by the pH of the solution. Real effluents have also been tested, and the COD decrease has been found to depend on the fatty acids/phenols ratio. Finally, respirometric studies have shown an increase in the BODst in effluents subjected to a mild oxidation, while under stronger conditions a BODst decrease is observed.
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Use of ozone and/or UV in the treatment of effluents from Board Paper industry.
Chemosphere, 2005Co-Authors: A M Amat, A Arques, Miguel A Miranda, F LopezAbstract:The aim of this work has been to study the viability of ozone and/or UV in the treatment of cardBoard industry effluents. Several model compounds have been chosen for the experiments: guaicol, eugenol, glucose, acetate and butyrate. Significant differences in the ozonisation rates are observed between phenolic products coming from lignin (eugenol and guaiacol) and aliphatic compounds. Reactions fit in all cases a pseudo-first order kinetics and are influenced by the pH of the solution. Real effluents have also been tested, and the COD decrease has been found to depend on the fatty acids/phenols ratio. Finally, respirometric studies have shown an increase in the BODst in effluents subjected to a mild oxidation, while under stronger conditions a BODst decrease is observed.
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Solar photo-catalysis to remove Paper mill wastewater pollutants
Solar Energy, 2005Co-Authors: A M Amat, A Arques, F Lopez, Miguel A MirandaAbstract:Abstract Solar degradation of effluents in Board Paper industries has been studied using different photo-catalysts: Fenton reagent and TiO 2 . p -Toluenesulfonic acid was chosen as a model compound for sulfonated pollutants already present in the incoming waters. The abatement of a 0.005 M solution of this pollutant after 6 h was found to be 47% for photo-Fenton and 27% for TiO 2 (pseudo-first-order rate constants 0.002 and 0.001 min −1 , respectively). Eugenol and guaiacol were chosen as models for lignin degradation products. They were efficiently degraded by both photo-catalysts, and reaction rates were higher for eugenol (0.0024 min −1 ) than for guaiacol (0.0018 min −1 ). A solution of sodium acetate, sodium butyrate and d -glucose was chosen to study the effect of photo-catalysis towards volatile fatty acids and saccharides arising from starch degradation. In this case a clearly worse performance was observed: only 20% degradation was observed after 7 h of treatment. When the real wastewater was treated with photo-catalytic methods, the best performance was obtained in closed circuits, when the COD values were higher. This fact can be explained by taking into account that closure of the circuits results in an accumulation of reluctant phenolic pollutants, while starch derivatives are continuously degraded by microorganisms in the circuits; as phenolic compounds are more easily degraded by photo-catalytic means, these methods are suitable for closed circuits. Finally, changes in the BOD st were determined by means of active sludges respirometry. A noticeable BOD st increase (30–50%) was observed in all cases, attributable to chemical oxidation of biodegradable species.
Miguel A Miranda - One of the best experts on this subject based on the ideXlab platform.
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use of ozone and or uv in the treatment of effluents from Board Paper industry
Chemosphere, 2005Co-Authors: A M Amat, A Arques, Miguel A Miranda, F LopezAbstract:The aim of this work has been to study the viability of ozone and/or UV in the treatment of cardBoard industry effluents. Several model compounds have been chosen for the experiments: guaicol, eugenol, glucose, acetate and butyrate. Significant differences in the ozonisation rates are observed between phenolic products coming from lignin (eugenol and guaiacol) and aliphatic compounds. Reactions fit in all cases a pseudo-first order kinetics and are influenced by the pH of the solution. Real effluents have also been tested, and the COD decrease has been found to depend on the fatty acids/phenols ratio. Finally, respirometric studies have shown an increase in the BODst in effluents subjected to a mild oxidation, while under stronger conditions a BODst decrease is observed.
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Use of ozone and/or UV in the treatment of effluents from Board Paper industry.
Chemosphere, 2005Co-Authors: A M Amat, A Arques, Miguel A Miranda, F LopezAbstract:The aim of this work has been to study the viability of ozone and/or UV in the treatment of cardBoard industry effluents. Several model compounds have been chosen for the experiments: guaicol, eugenol, glucose, acetate and butyrate. Significant differences in the ozonisation rates are observed between phenolic products coming from lignin (eugenol and guaiacol) and aliphatic compounds. Reactions fit in all cases a pseudo-first order kinetics and are influenced by the pH of the solution. Real effluents have also been tested, and the COD decrease has been found to depend on the fatty acids/phenols ratio. Finally, respirometric studies have shown an increase in the BODst in effluents subjected to a mild oxidation, while under stronger conditions a BODst decrease is observed.
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Solar photo-catalysis to remove Paper mill wastewater pollutants
Solar Energy, 2005Co-Authors: A M Amat, A Arques, F Lopez, Miguel A MirandaAbstract:Abstract Solar degradation of effluents in Board Paper industries has been studied using different photo-catalysts: Fenton reagent and TiO 2 . p -Toluenesulfonic acid was chosen as a model compound for sulfonated pollutants already present in the incoming waters. The abatement of a 0.005 M solution of this pollutant after 6 h was found to be 47% for photo-Fenton and 27% for TiO 2 (pseudo-first-order rate constants 0.002 and 0.001 min −1 , respectively). Eugenol and guaiacol were chosen as models for lignin degradation products. They were efficiently degraded by both photo-catalysts, and reaction rates were higher for eugenol (0.0024 min −1 ) than for guaiacol (0.0018 min −1 ). A solution of sodium acetate, sodium butyrate and d -glucose was chosen to study the effect of photo-catalysis towards volatile fatty acids and saccharides arising from starch degradation. In this case a clearly worse performance was observed: only 20% degradation was observed after 7 h of treatment. When the real wastewater was treated with photo-catalytic methods, the best performance was obtained in closed circuits, when the COD values were higher. This fact can be explained by taking into account that closure of the circuits results in an accumulation of reluctant phenolic pollutants, while starch derivatives are continuously degraded by microorganisms in the circuits; as phenolic compounds are more easily degraded by photo-catalytic means, these methods are suitable for closed circuits. Finally, changes in the BOD st were determined by means of active sludges respirometry. A noticeable BOD st increase (30–50%) was observed in all cases, attributable to chemical oxidation of biodegradable species.
A M Amat - One of the best experts on this subject based on the ideXlab platform.
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use of ozone and or uv in the treatment of effluents from Board Paper industry
Chemosphere, 2005Co-Authors: A M Amat, A Arques, Miguel A Miranda, F LopezAbstract:The aim of this work has been to study the viability of ozone and/or UV in the treatment of cardBoard industry effluents. Several model compounds have been chosen for the experiments: guaicol, eugenol, glucose, acetate and butyrate. Significant differences in the ozonisation rates are observed between phenolic products coming from lignin (eugenol and guaiacol) and aliphatic compounds. Reactions fit in all cases a pseudo-first order kinetics and are influenced by the pH of the solution. Real effluents have also been tested, and the COD decrease has been found to depend on the fatty acids/phenols ratio. Finally, respirometric studies have shown an increase in the BODst in effluents subjected to a mild oxidation, while under stronger conditions a BODst decrease is observed.
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Use of ozone and/or UV in the treatment of effluents from Board Paper industry.
Chemosphere, 2005Co-Authors: A M Amat, A Arques, Miguel A Miranda, F LopezAbstract:The aim of this work has been to study the viability of ozone and/or UV in the treatment of cardBoard industry effluents. Several model compounds have been chosen for the experiments: guaicol, eugenol, glucose, acetate and butyrate. Significant differences in the ozonisation rates are observed between phenolic products coming from lignin (eugenol and guaiacol) and aliphatic compounds. Reactions fit in all cases a pseudo-first order kinetics and are influenced by the pH of the solution. Real effluents have also been tested, and the COD decrease has been found to depend on the fatty acids/phenols ratio. Finally, respirometric studies have shown an increase in the BODst in effluents subjected to a mild oxidation, while under stronger conditions a BODst decrease is observed.
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Solar photo-catalysis to remove Paper mill wastewater pollutants
Solar Energy, 2005Co-Authors: A M Amat, A Arques, F Lopez, Miguel A MirandaAbstract:Abstract Solar degradation of effluents in Board Paper industries has been studied using different photo-catalysts: Fenton reagent and TiO 2 . p -Toluenesulfonic acid was chosen as a model compound for sulfonated pollutants already present in the incoming waters. The abatement of a 0.005 M solution of this pollutant after 6 h was found to be 47% for photo-Fenton and 27% for TiO 2 (pseudo-first-order rate constants 0.002 and 0.001 min −1 , respectively). Eugenol and guaiacol were chosen as models for lignin degradation products. They were efficiently degraded by both photo-catalysts, and reaction rates were higher for eugenol (0.0024 min −1 ) than for guaiacol (0.0018 min −1 ). A solution of sodium acetate, sodium butyrate and d -glucose was chosen to study the effect of photo-catalysis towards volatile fatty acids and saccharides arising from starch degradation. In this case a clearly worse performance was observed: only 20% degradation was observed after 7 h of treatment. When the real wastewater was treated with photo-catalytic methods, the best performance was obtained in closed circuits, when the COD values were higher. This fact can be explained by taking into account that closure of the circuits results in an accumulation of reluctant phenolic pollutants, while starch derivatives are continuously degraded by microorganisms in the circuits; as phenolic compounds are more easily degraded by photo-catalytic means, these methods are suitable for closed circuits. Finally, changes in the BOD st were determined by means of active sludges respirometry. A noticeable BOD st increase (30–50%) was observed in all cases, attributable to chemical oxidation of biodegradable species.
A Arques - One of the best experts on this subject based on the ideXlab platform.
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use of ozone and or uv in the treatment of effluents from Board Paper industry
Chemosphere, 2005Co-Authors: A M Amat, A Arques, Miguel A Miranda, F LopezAbstract:The aim of this work has been to study the viability of ozone and/or UV in the treatment of cardBoard industry effluents. Several model compounds have been chosen for the experiments: guaicol, eugenol, glucose, acetate and butyrate. Significant differences in the ozonisation rates are observed between phenolic products coming from lignin (eugenol and guaiacol) and aliphatic compounds. Reactions fit in all cases a pseudo-first order kinetics and are influenced by the pH of the solution. Real effluents have also been tested, and the COD decrease has been found to depend on the fatty acids/phenols ratio. Finally, respirometric studies have shown an increase in the BODst in effluents subjected to a mild oxidation, while under stronger conditions a BODst decrease is observed.
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Use of ozone and/or UV in the treatment of effluents from Board Paper industry.
Chemosphere, 2005Co-Authors: A M Amat, A Arques, Miguel A Miranda, F LopezAbstract:The aim of this work has been to study the viability of ozone and/or UV in the treatment of cardBoard industry effluents. Several model compounds have been chosen for the experiments: guaicol, eugenol, glucose, acetate and butyrate. Significant differences in the ozonisation rates are observed between phenolic products coming from lignin (eugenol and guaiacol) and aliphatic compounds. Reactions fit in all cases a pseudo-first order kinetics and are influenced by the pH of the solution. Real effluents have also been tested, and the COD decrease has been found to depend on the fatty acids/phenols ratio. Finally, respirometric studies have shown an increase in the BODst in effluents subjected to a mild oxidation, while under stronger conditions a BODst decrease is observed.
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Solar photo-catalysis to remove Paper mill wastewater pollutants
Solar Energy, 2005Co-Authors: A M Amat, A Arques, F Lopez, Miguel A MirandaAbstract:Abstract Solar degradation of effluents in Board Paper industries has been studied using different photo-catalysts: Fenton reagent and TiO 2 . p -Toluenesulfonic acid was chosen as a model compound for sulfonated pollutants already present in the incoming waters. The abatement of a 0.005 M solution of this pollutant after 6 h was found to be 47% for photo-Fenton and 27% for TiO 2 (pseudo-first-order rate constants 0.002 and 0.001 min −1 , respectively). Eugenol and guaiacol were chosen as models for lignin degradation products. They were efficiently degraded by both photo-catalysts, and reaction rates were higher for eugenol (0.0024 min −1 ) than for guaiacol (0.0018 min −1 ). A solution of sodium acetate, sodium butyrate and d -glucose was chosen to study the effect of photo-catalysis towards volatile fatty acids and saccharides arising from starch degradation. In this case a clearly worse performance was observed: only 20% degradation was observed after 7 h of treatment. When the real wastewater was treated with photo-catalytic methods, the best performance was obtained in closed circuits, when the COD values were higher. This fact can be explained by taking into account that closure of the circuits results in an accumulation of reluctant phenolic pollutants, while starch derivatives are continuously degraded by microorganisms in the circuits; as phenolic compounds are more easily degraded by photo-catalytic means, these methods are suitable for closed circuits. Finally, changes in the BOD st were determined by means of active sludges respirometry. A noticeable BOD st increase (30–50%) was observed in all cases, attributable to chemical oxidation of biodegradable species.
Abdul Raziq M. Askalany - One of the best experts on this subject based on the ideXlab platform.
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Pollution prevention pays off in a Board Paper mill
Journal of Cleaner Production, 2008Co-Authors: Sohair I. Abou-elela, Fayza A. Nasr, Hanan S. Ibrahim, Nagwa M. Badr, Abdul Raziq M. AskalanyAbstract:Abstract Environmental problems caused by recycling wasted Paper at a Board Paper mill provide the material of this study. Two scenarios have been investigated: The first being the treatment of the end-of-pipe, and the second being the control and management of pollution problems through the application of in-plant control and pollution prevention measures. Comparison between the two alternatives, based on a cost-benefit analysis and compliance with National Environmental Laws was done. From this study it was apparent that the implementation of the pollution prevention measures such as the recovery of fiber, reduction of fresh water consumption, and optimization of white water usage proved to be very cost effective. All the implemented solutions have short payback periods and resulted in great savings compared with the treatment of the end-of-pipe.