The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Min Qiu - One of the best experts on this subject based on the ideXlab platform.
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Energy Consumption Optimization of High Sulfur Natural Gas Purification Plant Based on Back Propagation Neural Network and Genetic Algorithms
Energy Procedia, 2017Co-Authors: Min QiuAbstract:Abstract In order to effectively reduce the energy consumption of high sulfur natural gas Purification process, in this paper, optimization model based on the genetic algorithm (GA) was developed. The natural gas Purification process steady state model was established by using process simulation software ProMax. 8 key operating parameters of the Purification system were determined by the process simulation model and energy consumption analysis. To reduce the calculation time and to solve the no convergence problems in the process simulation model, the BP (Back Propagation) neural network model was applied to train and test the simulated data. Then the BP model was incorporated into Genetic Algorithms to develop the energy consumption optimization model. A case study was performed in a high-sulfur natural gas Purification Plant with the capacity of 300×10 4 Nm 3 /d. And the results demonstrate that the energy consumption of the Purification Plant was reduced by 12.7%.
K. T. Shenoy - One of the best experts on this subject based on the ideXlab platform.
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Recovery of Hf and Zr from slurry waste of zirconium Purification Plant using solvent extraction
Hydrometallurgy, 2016Co-Authors: G. Pandey, A. U. Renjith, J M Joshi, S. Mukhopadhyay, K. T. ShenoyAbstract:Hafnium is a very important valuable metal with numerous applications in electronics, refractory and nuclear industry. Its source is the secondary waste streams of zirconium Purification Plant. The waste raffinate stream generated from Zr extraction Plant contains about 4 kg of Hf per ton of zircon sand processed. The conventional solvent extraction process with Tri Butyl Phosphate (TBP) as extractant is not suitable to recover Hf value lost in this low acidic lean stream. Presence of high concentration of silica, about 2 g/L poses additional challenge for application in solvent economic continuous contactors. A novel alkyl phosphine oxide based ligand having high separation factor for Zr over Hf, Mixed Alkyl Phosphine Oxide (MAPO) has been synthesised indigenously which is applicable for this lean stream. Batch equilibrium data were generated for this novel solvent to optimise the process conditions for application in continuous contactor. The developed process was successfully applied in five stage mixer settler set up in counter current mode with MAPO in mixed diluents as extractant, zirconium nitrate as the scrubbing agent and oxalic acid as the strippant. Recycle of extractant, scrub and strippant with concentration make up has been attempted to increase metal concentration in product stream and to reduce Plant waste volume. The work has been successful in achieving not only complete extraction of the Hf value from the Plant stream but also recovery of the metal as a concentrated solution ~ 10 g/L with 95% purity which was efficiently converted to oxide. The Zr value is also recovered from the waste stream completely during stripping. Studies were also conducted on the characteristics of silica present in the waste stream and a technique comprising of flocculation followed by ultrafiltration was applied to make the slurry feed solid-free to achieve trouble free operation. The present studies show the potential of the developed process for application to Zr Purification Plant for recovery of the Hf as well as the Zr value from its raffinate waste.
L A Bereschenko - One of the best experts on this subject based on the ideXlab platform.
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molecular characterization of the bacterial communities in the different compartments of a full scale reverse osmosis water Purification Plant
Applied and Environmental Microbiology, 2008Co-Authors: L A Bereschenko, G H J Heilig, M M Nederlof, M C M Van Loosdrecht, Alfons J M Stams, Gertjan EuverinkAbstract:The origin, structure, and composition of biofilms in various compartments of an industrial full-scale reverse-osmosis (RO) membrane water Purification Plant were analyzed by molecular biological methods. Samples were taken when the RO installation suffered from a substantial pressure drop and decreased production. The bacterial community of the RO membrane biofilm was clearly different from the bacterial community present at other locations in the RO Plant, indicating the development of a specialized bacterial community on the RO membranes. The typical freshwater phylotypes in the RO membrane biofilm (i.e., Proteobacteria, Cytophaga-Flexibacter-Bacteroides group, and Firmicutes) were also present in the water sample fed to the Plant, suggesting a feed water origin. However, the relative abundances of the different species in the mature biofilm were different from those in the feed water, indicating that the biofilm was actively formed on the RO membrane sheets and was not the result of a concentration of bacteria present in the feed water. The majority of the microorganisms (59% of the total number of clones) in the biofilm were related to the class Proteobacteria, with a dominance of Sphingomonas spp. (27% of all clones). Members of the genus Sphingomonas seem to be responsible for the biofouling of the membranes in the RO installation.
Gertjan Euverink - One of the best experts on this subject based on the ideXlab platform.
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molecular characterization of the bacterial communities in the different compartments of a full scale reverse osmosis water Purification Plant
Applied and Environmental Microbiology, 2008Co-Authors: L A Bereschenko, G H J Heilig, M M Nederlof, M C M Van Loosdrecht, Alfons J M Stams, Gertjan EuverinkAbstract:The origin, structure, and composition of biofilms in various compartments of an industrial full-scale reverse-osmosis (RO) membrane water Purification Plant were analyzed by molecular biological methods. Samples were taken when the RO installation suffered from a substantial pressure drop and decreased production. The bacterial community of the RO membrane biofilm was clearly different from the bacterial community present at other locations in the RO Plant, indicating the development of a specialized bacterial community on the RO membranes. The typical freshwater phylotypes in the RO membrane biofilm (i.e., Proteobacteria, Cytophaga-Flexibacter-Bacteroides group, and Firmicutes) were also present in the water sample fed to the Plant, suggesting a feed water origin. However, the relative abundances of the different species in the mature biofilm were different from those in the feed water, indicating that the biofilm was actively formed on the RO membrane sheets and was not the result of a concentration of bacteria present in the feed water. The majority of the microorganisms (59% of the total number of clones) in the biofilm were related to the class Proteobacteria, with a dominance of Sphingomonas spp. (27% of all clones). Members of the genus Sphingomonas seem to be responsible for the biofouling of the membranes in the RO installation.
G. Pandey - One of the best experts on this subject based on the ideXlab platform.
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Recovery of Hf and Zr from slurry waste of zirconium Purification Plant using solvent extraction
Hydrometallurgy, 2016Co-Authors: G. Pandey, A. U. Renjith, J M Joshi, S. Mukhopadhyay, K. T. ShenoyAbstract:Hafnium is a very important valuable metal with numerous applications in electronics, refractory and nuclear industry. Its source is the secondary waste streams of zirconium Purification Plant. The waste raffinate stream generated from Zr extraction Plant contains about 4 kg of Hf per ton of zircon sand processed. The conventional solvent extraction process with Tri Butyl Phosphate (TBP) as extractant is not suitable to recover Hf value lost in this low acidic lean stream. Presence of high concentration of silica, about 2 g/L poses additional challenge for application in solvent economic continuous contactors. A novel alkyl phosphine oxide based ligand having high separation factor for Zr over Hf, Mixed Alkyl Phosphine Oxide (MAPO) has been synthesised indigenously which is applicable for this lean stream. Batch equilibrium data were generated for this novel solvent to optimise the process conditions for application in continuous contactor. The developed process was successfully applied in five stage mixer settler set up in counter current mode with MAPO in mixed diluents as extractant, zirconium nitrate as the scrubbing agent and oxalic acid as the strippant. Recycle of extractant, scrub and strippant with concentration make up has been attempted to increase metal concentration in product stream and to reduce Plant waste volume. The work has been successful in achieving not only complete extraction of the Hf value from the Plant stream but also recovery of the metal as a concentrated solution ~ 10 g/L with 95% purity which was efficiently converted to oxide. The Zr value is also recovered from the waste stream completely during stripping. Studies were also conducted on the characteristics of silica present in the waste stream and a technique comprising of flocculation followed by ultrafiltration was applied to make the slurry feed solid-free to achieve trouble free operation. The present studies show the potential of the developed process for application to Zr Purification Plant for recovery of the Hf as well as the Zr value from its raffinate waste.
