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Chuyang Y Tang - One of the best experts on this subject based on the ideXlab platform.
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a novel Hybrid Process of reverse electrodialysis and reverse osmosis for low energy seawater desalination and brine management
Applied Energy, 2013Co-Authors: Weiyi Li, William B Krantz, E R Cornelissen, J W Post, Arne Verliefde, Chuyang Y TangAbstract:This paper introduces a novel concept for a Hybrid desalination system that combines reverse electrodialysis (RED) and reverse osmosis (RO) Processes. In this Hybrid Process the RED unit harvests the energy in the form of electricity from the salinity gradient between a highly concentrated solution (e.g., seawater or concentrated brine) and a low salinity solution (e.g., biologically treated secondary effluent or impaired water). The RED-treated high salinity solution has a lower salt concentration and serves as the feed solution for the RO unit to reduce the pump work. The concentrated RO brine provides the RED unit a better high salinity source for the energy recovery compared to seawater. In addition, the concentration of the discharged brine can be controlled by the RED unit for improving the water recovery and minimizing the impact on the environment. Different configurations of the Hybrid RED–RO Processes are presented for a comparative study on the basis of mathematical modeling. Specifically, various operating conditions for the RED unit are investigated for better adaptation to the Hybrid system. The variations of the total specific energy consumption and the discharge brine concentration for various Hybrid modes are simulated to verify the conceptual designs. The modeling results indicate that the RED–RO Hybrid Processes could substantially reduce the specific energy consumption and provide a better control of the discharge brine concentration in comparison to conventional seawater desalination RO Processes.
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a novel Hybrid Process of reverse electrodialysis and reverse osmosis for low energy seawater desalination and brine management
Applied Energy, 2013Co-Authors: William B Krantz, J W Post, Arne Verliefde, Emile Cornelissen, Chuyang Y TangAbstract:This paper introduces a novel concept for a Hybrid desalination system that combines reverse electrodialysis (RED) and reverse osmosis (RO) Processes. In this Hybrid Process the RED unit harvests the energy in the form of electricity from the salinity gradient between a highly concentrated solution (e.g., seawater or concentrated brine) and a low salinity solution (e.g., biologically treated secondary effluent or impaired water). The RED-treated high salinity solution has a lower salt concentration and serves as the feed solution for the RO unit to reduce the pump work. The concentrated RO brine provides the RED unit a better high salinity source for the energy recovery compared to seawater. In addition, the concentration of the discharged brine can be controlled by the RED unit for improving the water recovery and minimizing the impact on the environment. Different configurations of the Hybrid RED–RO Processes are presented for a comparative study on the basis of mathematical modeling. Specifically, various operating conditions for the RED unit are investigated for better adaptation to the Hybrid system. The variations of the total specific energy consumption and the discharge brine concentration for various Hybrid modes are simulated to verify the conceptual designs. The modeling results indicate that the RED–RO Hybrid Processes could substantially reduce the specific energy consumption and provide a better control of the discharge brine concentration in comparison to conventional seawater desalination RO Processes.
Arne Verliefde - One of the best experts on this subject based on the ideXlab platform.
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a novel Hybrid Process of reverse electrodialysis and reverse osmosis for low energy seawater desalination and brine management
Applied Energy, 2013Co-Authors: Weiyi Li, William B Krantz, E R Cornelissen, J W Post, Arne Verliefde, Chuyang Y TangAbstract:This paper introduces a novel concept for a Hybrid desalination system that combines reverse electrodialysis (RED) and reverse osmosis (RO) Processes. In this Hybrid Process the RED unit harvests the energy in the form of electricity from the salinity gradient between a highly concentrated solution (e.g., seawater or concentrated brine) and a low salinity solution (e.g., biologically treated secondary effluent or impaired water). The RED-treated high salinity solution has a lower salt concentration and serves as the feed solution for the RO unit to reduce the pump work. The concentrated RO brine provides the RED unit a better high salinity source for the energy recovery compared to seawater. In addition, the concentration of the discharged brine can be controlled by the RED unit for improving the water recovery and minimizing the impact on the environment. Different configurations of the Hybrid RED–RO Processes are presented for a comparative study on the basis of mathematical modeling. Specifically, various operating conditions for the RED unit are investigated for better adaptation to the Hybrid system. The variations of the total specific energy consumption and the discharge brine concentration for various Hybrid modes are simulated to verify the conceptual designs. The modeling results indicate that the RED–RO Hybrid Processes could substantially reduce the specific energy consumption and provide a better control of the discharge brine concentration in comparison to conventional seawater desalination RO Processes.
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a novel Hybrid Process of reverse electrodialysis and reverse osmosis for low energy seawater desalination and brine management
Applied Energy, 2013Co-Authors: William B Krantz, J W Post, Arne Verliefde, Emile Cornelissen, Chuyang Y TangAbstract:This paper introduces a novel concept for a Hybrid desalination system that combines reverse electrodialysis (RED) and reverse osmosis (RO) Processes. In this Hybrid Process the RED unit harvests the energy in the form of electricity from the salinity gradient between a highly concentrated solution (e.g., seawater or concentrated brine) and a low salinity solution (e.g., biologically treated secondary effluent or impaired water). The RED-treated high salinity solution has a lower salt concentration and serves as the feed solution for the RO unit to reduce the pump work. The concentrated RO brine provides the RED unit a better high salinity source for the energy recovery compared to seawater. In addition, the concentration of the discharged brine can be controlled by the RED unit for improving the water recovery and minimizing the impact on the environment. Different configurations of the Hybrid RED–RO Processes are presented for a comparative study on the basis of mathematical modeling. Specifically, various operating conditions for the RED unit are investigated for better adaptation to the Hybrid system. The variations of the total specific energy consumption and the discharge brine concentration for various Hybrid modes are simulated to verify the conceptual designs. The modeling results indicate that the RED–RO Hybrid Processes could substantially reduce the specific energy consumption and provide a better control of the discharge brine concentration in comparison to conventional seawater desalination RO Processes.
Baoyu Gao - One of the best experts on this subject based on the ideXlab platform.
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impacts of organic coagulant aid on purification performance and membrane fouling of coagulation ultrafiltration Hybrid Process with different al based coagulants
Desalination, 2015Co-Authors: Qinyan Yue, Baoyu GaoAbstract:Effects of polydimethyldiallylammonium chloride (PD) on coagulation behaviors of different Al-based coagulants were investigated in coagulation-ultrafiltration (C-UF) Hybrid Process, regarding the impurity removal efficiency, floc properties and membrane foulings. Floc characteristics, including floc size, compact degree, strength and re-growth ability were studied using a laser diffraction particle sizing device. Resistance analyses were implemented to explore the membrane fouling mechanisms. The results indicated that PD aid could increase the purification efficiency of C-UF, especially at low coagulant doses. PD-alum/PD-PACl contributed to large flocs, while alum-PD/PACl-PD gave rise to flocs with high R-f and D-f values. The results of ultrafiltration experiments showed that conventional coagulant, i.e,, alum led to a flux reduction of 52%; while the reductions for alum-PD and PD-alum were 53% and 34%, respectively. The flux reductions for PACl, PACl-PD and PD-PACl were 60%, 57% and 39%. Flux declines became more severe when the coagulated suspensions were exposed to increased shears and the suspensions coagulated by aluminum plus PD resulted in the least reductions in fluxes. (C) 2014 Elsevier B.V. All rights reserved.
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effect of shear conditions on floc properties and membrane fouling in coagulation ultrafiltration Hybrid Process the significance of alb species
Journal of Membrane Science, 2012Co-Authors: Baoyu GaoAbstract:Abstract Impacts of increased shear during coagulation on ultrafiltration permeate flux in coagulation–ultrafiltration (C–UF) Hybrid Process were investigated in this study. Three Al-based coagulants, alum, PACl and PACl–Al b , were applied to explore the role of Al b species in the C–UF Process. Floc characteristics, including floc size, strength, re-formation ability and fractal structure under different coagulation conditions, were studied using a laser diffraction particle sizing device. Additionally, resistance analyses were conducted to investigate the membrane fouling mechanisms. The results indicated that alum generated the largest flocs with loosely bonded structures before breakage, which were, however, the weakest and with poor re-growth abilities. PACl–Al b contributed to the strongest flocs with the best re-growth abilities and the highest compact degree. The results of ultrafiltration experiments showed that for conventional coagulation without breakage, alum led to a flux reduction of 34%, while the reduction for PACl and PACl–Al b was 39% and 49% respectively. However, under the increasing breaking shears, the adsorption and cake layer resistances for alum coagulation increased and fluxes were markedly aggravated; PACl–Al b coagulation effluent displayed the least resistances and flux variations. An extension in breakage time led to much severer flux decline than short breakage period. PACl–Al b led to the smallest changes in flux declines.
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influences of polysilicic acid in al13 species on floc properties and membrane fouling in coagulation ultrafiltration Hybrid Process
Chemical Engineering Journal, 2012Co-Authors: Baoyu Gao, Yan Wang, Qin Zhang, Qinyan YueAbstract:Abstract Effect of polysilicic acid (pSi) on pre-formed Al 13 polycation ([Al 13 O 4 (OH) 24 (H 2 O) 12 ] 7+ ) was investigated regarding the coagulation efficiency, floc properties and subsequent impact on membrane fouling in coagulation–ultrafiltration (C–UF) Hybrid Process. Also, the effect of pSi on the commonly used coagulant, polyaluminum chloride (PACl) was studied for comparison. Characteristics of aggregates pre-coagulated by different coagulants were investigated using a laser diffraction particle sizing device. And membrane fouling was investigated using a dead-end batch ultrafiltration unit. The results of this study indicated that the introduction of pSi into pre-hydrolyzed Al coagulants could obviously increase the coagulation efficiency, especially when the Si/Al ratio was 0.05. Al 13 produced stronger flocs than PACl, while pSi enhanced the floc strength factors for both Al 13 and PACl. However, Al 13 –Si and PACl–Si led to smaller recovery factors ( R f ) of aggregates than Al 13 and PACl. Additionally, the flocs formed by Al 13 presented compacter degree ( D f = 2.34) than those formed by PACl ( D f = 2.22); while both Al 13 –Si and PACl–Si gave rise to much loosely constructed flocs with similar D f values of 2.15 and 2.12, respectively. The results of ultrafiltration experiments implied that Al 13 produced less membrane fouling than PACl. Incorporation of pSi into Al coagulants could significantly alleviate the cake layer and adsorption resistance and thus the membrane fouling. The effects of Al 13 –Si and PACl–Si on flux declines and filtration resistances were similar.
William B Krantz - One of the best experts on this subject based on the ideXlab platform.
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a novel Hybrid Process of reverse electrodialysis and reverse osmosis for low energy seawater desalination and brine management
Applied Energy, 2013Co-Authors: Weiyi Li, William B Krantz, E R Cornelissen, J W Post, Arne Verliefde, Chuyang Y TangAbstract:This paper introduces a novel concept for a Hybrid desalination system that combines reverse electrodialysis (RED) and reverse osmosis (RO) Processes. In this Hybrid Process the RED unit harvests the energy in the form of electricity from the salinity gradient between a highly concentrated solution (e.g., seawater or concentrated brine) and a low salinity solution (e.g., biologically treated secondary effluent or impaired water). The RED-treated high salinity solution has a lower salt concentration and serves as the feed solution for the RO unit to reduce the pump work. The concentrated RO brine provides the RED unit a better high salinity source for the energy recovery compared to seawater. In addition, the concentration of the discharged brine can be controlled by the RED unit for improving the water recovery and minimizing the impact on the environment. Different configurations of the Hybrid RED–RO Processes are presented for a comparative study on the basis of mathematical modeling. Specifically, various operating conditions for the RED unit are investigated for better adaptation to the Hybrid system. The variations of the total specific energy consumption and the discharge brine concentration for various Hybrid modes are simulated to verify the conceptual designs. The modeling results indicate that the RED–RO Hybrid Processes could substantially reduce the specific energy consumption and provide a better control of the discharge brine concentration in comparison to conventional seawater desalination RO Processes.
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a novel Hybrid Process of reverse electrodialysis and reverse osmosis for low energy seawater desalination and brine management
Applied Energy, 2013Co-Authors: William B Krantz, J W Post, Arne Verliefde, Emile Cornelissen, Chuyang Y TangAbstract:This paper introduces a novel concept for a Hybrid desalination system that combines reverse electrodialysis (RED) and reverse osmosis (RO) Processes. In this Hybrid Process the RED unit harvests the energy in the form of electricity from the salinity gradient between a highly concentrated solution (e.g., seawater or concentrated brine) and a low salinity solution (e.g., biologically treated secondary effluent or impaired water). The RED-treated high salinity solution has a lower salt concentration and serves as the feed solution for the RO unit to reduce the pump work. The concentrated RO brine provides the RED unit a better high salinity source for the energy recovery compared to seawater. In addition, the concentration of the discharged brine can be controlled by the RED unit for improving the water recovery and minimizing the impact on the environment. Different configurations of the Hybrid RED–RO Processes are presented for a comparative study on the basis of mathematical modeling. Specifically, various operating conditions for the RED unit are investigated for better adaptation to the Hybrid system. The variations of the total specific energy consumption and the discharge brine concentration for various Hybrid modes are simulated to verify the conceptual designs. The modeling results indicate that the RED–RO Hybrid Processes could substantially reduce the specific energy consumption and provide a better control of the discharge brine concentration in comparison to conventional seawater desalination RO Processes.
J W Post - One of the best experts on this subject based on the ideXlab platform.
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a novel Hybrid Process of reverse electrodialysis and reverse osmosis for low energy seawater desalination and brine management
Applied Energy, 2013Co-Authors: Weiyi Li, William B Krantz, E R Cornelissen, J W Post, Arne Verliefde, Chuyang Y TangAbstract:This paper introduces a novel concept for a Hybrid desalination system that combines reverse electrodialysis (RED) and reverse osmosis (RO) Processes. In this Hybrid Process the RED unit harvests the energy in the form of electricity from the salinity gradient between a highly concentrated solution (e.g., seawater or concentrated brine) and a low salinity solution (e.g., biologically treated secondary effluent or impaired water). The RED-treated high salinity solution has a lower salt concentration and serves as the feed solution for the RO unit to reduce the pump work. The concentrated RO brine provides the RED unit a better high salinity source for the energy recovery compared to seawater. In addition, the concentration of the discharged brine can be controlled by the RED unit for improving the water recovery and minimizing the impact on the environment. Different configurations of the Hybrid RED–RO Processes are presented for a comparative study on the basis of mathematical modeling. Specifically, various operating conditions for the RED unit are investigated for better adaptation to the Hybrid system. The variations of the total specific energy consumption and the discharge brine concentration for various Hybrid modes are simulated to verify the conceptual designs. The modeling results indicate that the RED–RO Hybrid Processes could substantially reduce the specific energy consumption and provide a better control of the discharge brine concentration in comparison to conventional seawater desalination RO Processes.
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a novel Hybrid Process of reverse electrodialysis and reverse osmosis for low energy seawater desalination and brine management
Applied Energy, 2013Co-Authors: William B Krantz, J W Post, Arne Verliefde, Emile Cornelissen, Chuyang Y TangAbstract:This paper introduces a novel concept for a Hybrid desalination system that combines reverse electrodialysis (RED) and reverse osmosis (RO) Processes. In this Hybrid Process the RED unit harvests the energy in the form of electricity from the salinity gradient between a highly concentrated solution (e.g., seawater or concentrated brine) and a low salinity solution (e.g., biologically treated secondary effluent or impaired water). The RED-treated high salinity solution has a lower salt concentration and serves as the feed solution for the RO unit to reduce the pump work. The concentrated RO brine provides the RED unit a better high salinity source for the energy recovery compared to seawater. In addition, the concentration of the discharged brine can be controlled by the RED unit for improving the water recovery and minimizing the impact on the environment. Different configurations of the Hybrid RED–RO Processes are presented for a comparative study on the basis of mathematical modeling. Specifically, various operating conditions for the RED unit are investigated for better adaptation to the Hybrid system. The variations of the total specific energy consumption and the discharge brine concentration for various Hybrid modes are simulated to verify the conceptual designs. The modeling results indicate that the RED–RO Hybrid Processes could substantially reduce the specific energy consumption and provide a better control of the discharge brine concentration in comparison to conventional seawater desalination RO Processes.
