Journal of water process engineering最新文献_第6页

Intelligent parameter optimization of sealed airbag vessels with preventing water hammer in cascaded pressurized water transmission system: Based on MOPSO algorithm

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jwpe.2024.106915

Ran Li , Yanqiang Gao , Baiyi Jiang , Mou Lv , Hang Li

For long-distance water transmission projects utilizing cascade pressurized pump stations in mountainous regions, the configuration and optimization of water hammer protection equipment are indispensable. In practical engineering applications, the setup of water hammer protection equipment is not solely determined by the pipeline's ultimate pressure. Hence, a comprehensive evaluation of safety and cost factors should be conducted, while ensuring that the pipeline's carrying capacity is not exceeded. This paper opts for sealed airbag vessels as the water hammer protection equipment, aiming to optimize water transmission safety and equipment procurement costs. Utilizing the Bentley Hammer v10.08 and MATLAB R2023 software platforms, and incorporating the Latin Hypercube Sampling (LHS) method decomposed by Cholesky, stepwise regression analysis, Multi-objective Particle Swarm Optimization (MOPSO) algorithm, and fuzzy membership normalization evaluation method, a conceptual analysis module is developed. This module simulates the sampling of the optimization variables within the constraints to obtain a high-quality set of expected samples. A high-precision objective function formulation was derived by fitting the data with higher dispersion. A comprehensive evaluation of several Pareto optimal solutions was performed to identify a high-reliability water hammer protection scheme for the entire pipeline. It indicates that the optimal selection of water hammer protection equipment reduces transient positive pressure head and transient negative pressure head by 37.66 % and 63.74 % respectively, compared to the system without protection equipment. And compared to the equipment purchase cost before optimization, it can save 28.37 %. This research will provide theoretical guidance for rational selection of sealed airbag air vessels.

{"title":"Intelligent parameter optimization of sealed airbag vessels with preventing water hammer in cascaded pressurized water transmission system: Based on MOPSO algorithm","authors":"Ran Li , Yanqiang Gao , Baiyi Jiang , Mou Lv , Hang Li","doi":"10.1016/j.jwpe.2024.106915","DOIUrl":"10.1016/j.jwpe.2024.106915","url":null,"abstract":"<div><div>For long-distance water transmission projects utilizing cascade pressurized pump stations in mountainous regions, the configuration and optimization of water hammer protection equipment are indispensable. In practical engineering applications, the setup of water hammer protection equipment is not solely determined by the pipeline's ultimate pressure. Hence, a comprehensive evaluation of safety and cost factors should be conducted, while ensuring that the pipeline's carrying capacity is not exceeded. This paper opts for sealed airbag vessels as the water hammer protection equipment, aiming to optimize water transmission safety and equipment procurement costs. Utilizing the Bentley Hammer v10.08 and MATLAB R2023 software platforms, and incorporating the Latin Hypercube Sampling (LHS) method decomposed by Cholesky, stepwise regression analysis, Multi-objective Particle Swarm Optimization (MOPSO) algorithm, and fuzzy membership normalization evaluation method, a conceptual analysis module is developed. This module simulates the sampling of the optimization variables within the constraints to obtain a high-quality set of expected samples. A high-precision objective function formulation was derived by fitting the data with higher dispersion. A comprehensive evaluation of several Pareto optimal solutions was performed to identify a high-reliability water hammer protection scheme for the entire pipeline. It indicates that the optimal selection of water hammer protection equipment reduces transient positive pressure head and transient negative pressure head by 37.66 % and 63.74 % respectively, compared to the system without protection equipment. And compared to the equipment purchase cost before optimization, it can save 28.37 %. This research will provide theoretical guidance for rational selection of sealed airbag air vessels.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106915"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Response mechanism of bacterial community and physicochemical factors evolution to ecological restoration in sediment and water dual medium of Baiyangdian Lake

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jwpe.2025.106949

Yuting Zhao , Wanying Li , Rui Huo , Chenbin Wu , Yiling Di , Kun Shi , Shilei Zhou

Deciphering the response of lake planktonic bacterial and sedimentary bacteria to ecological restoration is essential for providing multi-habitat shallow lake governance. The dynamic changes of plankton, sedimentary bacteria, and environmental indicators were investigated from 2019 to 2023 in Baiyangdian Lake. The results indicate that ecological restoration in Baiyangdian Lake can effectively improve the quality of water environment. The alpha diversity of planktonic bacteria and sedimentary bacteria increased, with the highest values being 879.56 ± 125.09 and 2725.40 ± 238.09, respectively. With ecological restoration, there was no significant difference in bacterial community composition, but significant temporal heterogeneity (P < 0.05). The proportion of Norank_f_Anaerolineaceae gradually increases (1.70 %, 3.92 %, and 4.43 %), leading to a decrease in nitrogen in sediments. The environmental driving factors exhibited heterogeneity, while dissolved oxygen (DO) and weak acid extractable form nitrogen (WAEF-N) mainly played roles for the microbial community variation of water and sediment. The symbiotic network further showed that the planktonic bacterial network in 2021 and the sedimentary bacterial network in 2019 were the most complex and stable, with key taxa being the drivers of microbial community junction stability. There are significant similarities among bacterial subcommunities, and rare taxa (RT) are important components to maintain the stability and complexity of bacterial communities. Finally, with the implementation of ecological restoration, the similarity between planktonic and sedimentary bacterial communities increases, and the ecosystem is more stable. The results of this study enhance our understanding of the microbial changes and physicochemical factors evolution during ecological remediation processes.

{"title":"Response mechanism of bacterial community and physicochemical factors evolution to ecological restoration in sediment and water dual medium of Baiyangdian Lake","authors":"Yuting Zhao , Wanying Li , Rui Huo , Chenbin Wu , Yiling Di , Kun Shi , Shilei Zhou","doi":"10.1016/j.jwpe.2025.106949","DOIUrl":"10.1016/j.jwpe.2025.106949","url":null,"abstract":"<div><div>Deciphering the response of lake planktonic bacterial and sedimentary bacteria to ecological restoration is essential for providing multi-habitat shallow lake governance. The dynamic changes of plankton, sedimentary bacteria, and environmental indicators were investigated from 2019 to 2023 in Baiyangdian Lake. The results indicate that ecological restoration in Baiyangdian Lake can effectively improve the quality of water environment. The alpha diversity of planktonic bacteria and sedimentary bacteria increased, with the highest values being 879.56 ± 125.09 and 2725.40 ± 238.09, respectively. With ecological restoration, there was no significant difference in bacterial community composition, but significant temporal heterogeneity (<em>P</em> < 0.05). The proportion of <em>Norank_f_Anaerolineaceae</em> gradually increases (1.70 %, 3.92 %, and 4.43 %), leading to a decrease in nitrogen in sediments. The environmental driving factors exhibited heterogeneity, while dissolved oxygen (DO) and weak acid extractable form nitrogen (WAEF-N) mainly played roles for the microbial community variation of water and sediment. The symbiotic network further showed that the planktonic bacterial network in 2021 and the sedimentary bacterial network in 2019 were the most complex and stable, with key taxa being the drivers of microbial community junction stability. There are significant similarities among bacterial subcommunities, and rare taxa (RT) are important components to maintain the stability and complexity of bacterial communities. Finally, with the implementation of ecological restoration, the similarity between planktonic and sedimentary bacterial communities increases, and the ecosystem is more stable. The results of this study enhance our understanding of the microbial changes and physicochemical factors evolution during ecological remediation processes.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106949"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The denitrification mechanism and microbial responses of oligotrophic aerobic denitrifying bacteria coupled with various sources biochar

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jwpe.2025.106983

Yiling Di, Rui Huo, Wanying Li, Chenbin Wu, Shilei Zhou

Biochar has a wide range of applications for efficient microbial nitrogen removal. The efficiency and mechanism of nitrogen removal and the dynamic microbial response of corn stover, reed, and bamboo biochar mixed aerobic denitrifying bacteria (CS-BIADB, RE-BIADB, and BB-BIADB) were investigated. There were differences in the characterization and derivatization of different biochar materials. Corn stover biochar possesses a higher capacitance and more alkaline initial derivatives (pH = 9.71); the concentration of aromatic protein I in the initial derivatives of reed biochar is relatively high; the initial derivative concentration of bamboo biochar is the highest. The highest nitrate nitrogen (NO₃⁻-N) removal was observed for RE-BIADB at N = 40 mg/L (67.24 ± 2.64 %); and the highest NO₃⁻-N removal was observed for BB-BIADB at N = 10 mg/L (40.57 ± 4.98 %); in the intermittent experiment, CS-BIADB had the highest final NO₃⁻-N removal efficiency (57.79 ± 1.81 %). The rich functional groups and charging/discharging capacitance of the biochar material contributed to its better performance in long-term nitrogen removal. CS-BIADB always has the highest microbial diversity and abundance. At the end of the experiment, the microbial diversity of different BIADBs increased, while their distinctive ness decreased. Correlation analysis indicated that biochar derivative-like protein I played key roles in improving microbial nitrogen removal efficiency. In addition, network analysis results indicated that Azoarcus, Bdellovibrio, and Comamonadaceae were the key genera for NO₃⁻-N removal in the three BIADBs. In summary, this paper reveals the mechanism of biochar to promote NO₃⁻-N removal by aerobic denitrifying bacteria and provides support for the application to microbial denitrification in oligotrophic waters.

{"title":"The denitrification mechanism and microbial responses of oligotrophic aerobic denitrifying bacteria coupled with various sources biochar","authors":"Yiling Di, Rui Huo, Wanying Li, Chenbin Wu, Shilei Zhou","doi":"10.1016/j.jwpe.2025.106983","DOIUrl":"10.1016/j.jwpe.2025.106983","url":null,"abstract":"<div><div>Biochar has a wide range of applications for efficient microbial nitrogen removal. The efficiency and mechanism of nitrogen removal and the dynamic microbial response of corn stover, reed, and bamboo biochar mixed aerobic denitrifying bacteria (CS-BIADB, RE-BIADB, and BB-BIADB) were investigated. There were differences in the characterization and derivatization of different biochar materials. Corn stover biochar possesses a higher capacitance and more alkaline initial derivatives (pH = 9.71); the concentration of aromatic protein I in the initial derivatives of reed biochar is relatively high; the initial derivative concentration of bamboo biochar is the highest. The highest nitrate nitrogen (NO<sub>3</sub><sup>−</sup>-N) removal was observed for RE-BIADB at <em>N</em> = 40 mg/L (67.24 ± 2.64 %); and the highest NO<sub>3</sub><sup>−</sup>-N removal was observed for BB-BIADB at <em>N</em> = 10 mg/L (40.57 ± 4.98 %); in the intermittent experiment, CS-BIADB had the highest final NO<sub>3</sub><sup>−</sup>-N removal efficiency (57.79 ± 1.81 %). The rich functional groups and charging/discharging capacitance of the biochar material contributed to its better performance in long-term nitrogen removal. CS-BIADB always has the highest microbial diversity and abundance. At the end of the experiment, the microbial diversity of different BIADBs increased, while their distinctive ness decreased. Correlation analysis indicated that biochar derivative-like protein I played key roles in improving microbial nitrogen removal efficiency. In addition, network analysis results indicated that <em>Azoarcus</em>, <em>Bdellovibrio,</em> and <em>Comamonadaceae</em> were the key genera for NO<sub>3</sub><sup>−</sup>-N removal in the three BIADBs. In summary, this paper reveals the mechanism of biochar to promote NO<sub>3</sub><sup>−</sup>-N removal by aerobic denitrifying bacteria and provides support for the application to microbial denitrification in oligotrophic waters.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106983"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solvent-free green preparation of reinforced FEP/SiO2-SSM composite membrane for high temperature waste oil treatment

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jwpe.2025.106978

Shuang Zhang , Kaikai Chen , Haibo Yan , Yunlong Dai , Zhengjie Yue , Changfa Xiao

Traditional separation membrane preparation techniques require the use of a large amount of organic solvents, which can easily lead to secondary pollution. Moreover, most separation membrane materials have limited research in the field of high-temperature waste oil treatment. Stainless steel mesh (SSM) is favored for its high-temperature resistance and physical and chemical stability, while polyperfluoroethylene propylene (FEP) is chosen for its low surface energy and corrosion resistance. This study presents the development of a hydrophobic composite membrane that combines rigidity and flexibility based on a coating-sintering method. The membrane is composed of FEP as the membrane-forming polymer, polyvinyl alcohol (PVA) as the pore-forming agent, and SSM serving as the matrix reinforcement. Additionally, silicon dioxide (SiO₂) particles, known for their high-temperature resistance and minimal shrinkage, are incorporated to create a micro-nanostructured surface, enhancing the membrane's ability to efficiently permeate oil. The results showed that the composite membrane exhibited a uniform membrane pore structure and good high-temperature oil permeation flux when the addition of SiO₂ was 2 wt%, and the separation efficiencies of silicone oil suspension and kerosene-in-water emulsion could reach up to 99.76 % and 98.6 % respectively, which demonstrated excellent retention performance. After five cycles of experiments, the recovery efficiency of kerosene flux and high-temperature lubricating oil flux stabilized at over 84.1 % and 83.75 % respectively. Therefore, the composite membrane shows promise for advancement in the recovery of high-temperature oils and in the separation of emulsions.

{"title":"Solvent-free green preparation of reinforced FEP/SiO2-SSM composite membrane for high temperature waste oil treatment","authors":"Shuang Zhang , Kaikai Chen , Haibo Yan , Yunlong Dai , Zhengjie Yue , Changfa Xiao","doi":"10.1016/j.jwpe.2025.106978","DOIUrl":"10.1016/j.jwpe.2025.106978","url":null,"abstract":"<div><div>Traditional separation membrane preparation techniques require the use of a large amount of organic solvents, which can easily lead to secondary pollution. Moreover, most separation membrane materials have limited research in the field of high-temperature waste oil treatment. Stainless steel mesh (SSM) is favored for its high-temperature resistance and physical and chemical stability, while polyperfluoroethylene propylene (FEP) is chosen for its low surface energy and corrosion resistance. This study presents the development of a hydrophobic composite membrane that combines rigidity and flexibility based on a coating-sintering method. The membrane is composed of FEP as the membrane-forming polymer, polyvinyl alcohol (PVA) as the pore-forming agent, and SSM serving as the matrix reinforcement. Additionally, silicon dioxide (SiO<sub>2</sub>) particles, known for their high-temperature resistance and minimal shrinkage, are incorporated to create a micro-nanostructured surface, enhancing the membrane's ability to efficiently permeate oil. The results showed that the composite membrane exhibited a uniform membrane pore structure and good high-temperature oil permeation flux when the addition of SiO<sub>2</sub> was 2 wt%, and the separation efficiencies of silicone oil suspension and kerosene-in-water emulsion could reach up to 99.76 % and 98.6 % respectively, which demonstrated excellent retention performance. After five cycles of experiments, the recovery efficiency of kerosene flux and high-temperature lubricating oil flux stabilized at over 84.1 % and 83.75 % respectively. Therefore, the composite membrane shows promise for advancement in the recovery of high-temperature oils and in the separation of emulsions.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106978"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing denitrification of the wastewater with low carbon/nitrogen ratio using immobilized sulfur/anthraquinone

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jwpe.2024.106885

Jintao Zhang , Meilan Xu , Minghui Wang

To enhance biological denitrification of the wastewater with low C/N ratio, a novel immobilized sulfur/anthraquinone mediator using polyvinyl alcohol (PVA), sodium alginate (SA) and waterborne polyurethane (WPU) was prepared. The composite materials were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), fully automatic specific surface and porosity analyzer, and cyclic voltammetry (CV) test. The batch denitrification experiment results showed that the immobilized sulfur/1,8-dichloroanthraquinone (PVA/SA/WPU-S/1,8-AQ) and sulfur/1,5-dichloroanthraquinone (PVA/SA/WPU-S/1,5-AQ) could improve the denitrification of the wastewater with low C/N ratio. The PVA/SA/WPU-S/1,8-AQ exhibited the more remarkable enhancement effect. The removal rate of NO₃⁻-N increased by 36.6 % compared with the control (without sulfur and quinone mediator). Moreover, the optimal material fabrication parameters including the PVA/SA ratio of 20:1, the WPU addition of 8 % and 1,8-AQ addition of 3 % were obtained, respectively. The PVA/SA/WPU-S/1,8-AQ dosage of 10 %, the cube size of 5 mm and the initial nitrate concentration of 15 mg/L were appropriate for the enhancement of the denitrification in this study. The results of the denitrification experiment conducted for 10 cycles confirmed the superior reusability of the PVA/SA/WPU-S/1,8-AQ. It was discovered that the sulfur autotrophic denitrification (SAD) process predominated in the nitrogen removal with PVA/SA/WPU-S/1,8-AQ. The immobilized 1,8-AQ played an important role as the electron mediator in the SAD process and significantly promoted the further reduction of NO₂⁻. Moreover, PVA/SA/WPU-S/1,8-AQ could enhance the enrichment of Thiobacillus associated with the SAD. These results suggest that the novel composite material shows great potential for application in denitrification of the wastewater with low C/N ratio.

{"title":"Enhancing denitrification of the wastewater with low carbon/nitrogen ratio using immobilized sulfur/anthraquinone","authors":"Jintao Zhang , Meilan Xu , Minghui Wang","doi":"10.1016/j.jwpe.2024.106885","DOIUrl":"10.1016/j.jwpe.2024.106885","url":null,"abstract":"<div><div>To enhance biological denitrification of the wastewater with low C/N ratio, a novel immobilized sulfur/anthraquinone mediator using polyvinyl alcohol (PVA), sodium alginate (SA) and waterborne polyurethane (WPU) was prepared. The composite materials were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), fully automatic specific surface and porosity analyzer, and cyclic voltammetry (CV) test. The batch denitrification experiment results showed that the immobilized sulfur/1,8-dichloroanthraquinone (PVA/SA/WPU-S/1,8-AQ) and sulfur/1,5-dichloroanthraquinone (PVA/SA/WPU-S/1,5-AQ) could improve the denitrification of the wastewater with low C/N ratio. The PVA/SA/WPU-S/1,8-AQ exhibited the more remarkable enhancement effect. The removal rate of NO<sub>3</sub><sup>−</sup>-N increased by 36.6 % compared with the control (without sulfur and quinone mediator). Moreover, the optimal material fabrication parameters including the PVA/SA ratio of 20:1, the WPU addition of 8 % and 1,8-AQ addition of 3 % were obtained, respectively. The PVA/SA/WPU-S/1,8-AQ dosage of 10 %, the cube size of 5 mm and the initial nitrate concentration of 15 mg/L were appropriate for the enhancement of the denitrification in this study. The results of the denitrification experiment conducted for 10 cycles confirmed the superior reusability of the PVA/SA/WPU-S/1,8-AQ. It was discovered that the sulfur autotrophic denitrification (SAD) process predominated in the nitrogen removal with PVA/SA/WPU-S/1,8-AQ. The immobilized 1,8-AQ played an important role as the electron mediator in the SAD process and significantly promoted the further reduction of NO<sub>2</sub><sup>−</sup>. Moreover, PVA/SA/WPU-S/1,8-AQ could enhance the enrichment of <em>Thiobacillus</em> associated with the SAD. These results suggest that the novel composite material shows great potential for application in denitrification of the wastewater with low C/N ratio.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106885"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strong adsorption of tetracycline on carbon blacks: An in-depth study of the adsorption mechanism

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jwpe.2024.106784

Xiang Li , Lingling Zeng , Liya Zhu , Huating Jiang , Chunrui Liu , Yingjie Dai

The adsorption process of tetracycline (TC) on different types of carbon black (CB) was investigated. The CB materials were characterized in detail to determine their physicochemical properties. BET analysis yielded specific surface areas of 842.99 m²/g and 1362.92 m²/g for CB-A and CB-B, respectively. The results were fitted using kinetic and isothermal models, and then assessed using AICc. It was found that, the pseudo-second-order kinetic model provided a satisfactory fit, with R² values of 0.9840 for CB-B and 0.8759 for CB-A. The Langmuir adsorption isotherm was the best fit, with R² values of 0.9683 for CB-B and 0.9906 for CB-A, and saturated adsorption amounts of 654.06 mg/g and 427.46 mg/g, respectively. Density Functional Theory (DFT) was used to analyze the electrostatic potential distribution and the magnitude of the adsorption energy, with a theoretical adsorption energy of −0.526 Ha and an interaction distance of 3.835 Å. Specific surface area and pore size also had an effect on the adsorption amount. The strong adsorption properties found in CB make it a very promising adsorbent, and this study provides a new idea for the study of antibiotic adsorption by CB and its mechanism.

{"title":"Strong adsorption of tetracycline on carbon blacks: An in-depth study of the adsorption mechanism","authors":"Xiang Li , Lingling Zeng , Liya Zhu , Huating Jiang , Chunrui Liu , Yingjie Dai","doi":"10.1016/j.jwpe.2024.106784","DOIUrl":"10.1016/j.jwpe.2024.106784","url":null,"abstract":"<div><div>The adsorption process of tetracycline (TC) on different types of carbon black (CB) was investigated. The CB materials were characterized in detail to determine their physicochemical properties. BET analysis yielded specific surface areas of 842.99 m<sup>2</sup>/g and 1362.92 m<sup>2</sup>/g for CB-A and CB-B, respectively. The results were fitted using kinetic and isothermal models, and then assessed using AICc. It was found that, the pseudo-second-order kinetic model provided a satisfactory fit, with <em>R</em><sup><em>2</em></sup> values of 0.9840 for CB-B and 0.8759 for CB-A. The Langmuir adsorption isotherm was the best fit, with <em>R</em><sup><em>2</em></sup> values of 0.9683 for CB-B and 0.9906 for CB-A, and saturated adsorption amounts of 654.06 mg/g and 427.46 mg/g, respectively. Density Functional Theory (DFT) was used to analyze the electrostatic potential distribution and the magnitude of the adsorption energy, with a theoretical adsorption energy of −0.526 Ha and an interaction distance of 3.835 Å. Specific surface area and pore size also had an effect on the adsorption amount. The strong adsorption properties found in CB make it a very promising adsorbent, and this study provides a new idea for the study of antibiotic adsorption by CB and its mechanism.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106784"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impacts of coagulant types on the treatment efficiency of coal mine wastewater in the ultrafiltration-reverse osmosis process

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jwpe.2024.106911

Zixiang Zhang , Lu Li , Lei Xu , Saijid Rashid , Mengtao Zhang , Wenzheng Yu

The reverse osmosis (RO) process is commonly employed for coal mine wastewater treatment; however, membrane fouling limits its efficiency and development. This study investigates focusing on impact on membrane fouling and treatment efficacy of three coagulants (polymeric aluminum chloride (PAC), polymeric aluminum ferric chloride (PAFC), and aluminum chloride (AlCl₃)) in the coagulation-ultrafiltration (CUF) process. Results indicate that PAFC outperforms the other coagulants in reducing dissolved organic matter (DOM) and key ions, including calcium, magnesium, and silica. Notably, PAFC exhibited a higher adsorption capacity for aromatic DOM and achieved the highest dissolved organic carbon (DOC) removal rate at lower dosage. In terms of ion removal, PAFC was proved to be the most effective, Silicon concentration was reduced by 58.65 %, calcium by 81.57 %, and magnesium by 71.23 %. The superior performance of PAFC can be attributed to the synergistic interaction between its iron and aluminum ions. Iron ions, with higher charge density and hydrolysis potential, form multinuclear hydroxyl complexes with aluminum ions, enhancing their ability to bridge and adsorb suspended particles and organic pollutants. Additionally, the hydrolysis of PAFC produces more hydroxyl groups, which facilitate chelation with metal ions, improving the removal of ion-organic complexes. The effective pre-treatment using PAFC resulted in the highest subsequent RO flux among the tested coagulants. This study demonstrates that coagulant selection significantly influences both UF flux and RO system performance. PAFC emerges as the most effective and promising coagulant for enhancing CUF process efficiency in coal mine wastewater treatment and extending the operational lifespan of RO membranes.

{"title":"Impacts of coagulant types on the treatment efficiency of coal mine wastewater in the ultrafiltration-reverse osmosis process","authors":"Zixiang Zhang , Lu Li , Lei Xu , Saijid Rashid , Mengtao Zhang , Wenzheng Yu","doi":"10.1016/j.jwpe.2024.106911","DOIUrl":"10.1016/j.jwpe.2024.106911","url":null,"abstract":"<div><div>The reverse osmosis (RO) process is commonly employed for coal mine wastewater treatment; however, membrane fouling limits its efficiency and development. This study investigates focusing on impact on membrane fouling and treatment efficacy of three coagulants (polymeric aluminum chloride (PAC), polymeric aluminum ferric chloride (PAFC), and aluminum chloride (AlCl₃)) in the coagulation-ultrafiltration (CUF) process. Results indicate that PAFC outperforms the other coagulants in reducing dissolved organic matter (DOM) and key ions, including calcium, magnesium, and silica. Notably, PAFC exhibited a higher adsorption capacity for aromatic DOM and achieved the highest dissolved organic carbon (DOC) removal rate at lower dosage. In terms of ion removal, PAFC was proved to be the most effective, Silicon concentration was reduced by 58.65 %, calcium by 81.57 %, and magnesium by 71.23 %. The superior performance of PAFC can be attributed to the synergistic interaction between its iron and aluminum ions. Iron ions, with higher charge density and hydrolysis potential, form multinuclear hydroxyl complexes with aluminum ions, enhancing their ability to bridge and adsorb suspended particles and organic pollutants. Additionally, the hydrolysis of PAFC produces more hydroxyl groups, which facilitate chelation with metal ions, improving the removal of ion-organic complexes. The effective pre-treatment using PAFC resulted in the highest subsequent RO flux among the tested coagulants. This study demonstrates that coagulant selection significantly influences both UF flux and RO system performance. PAFC emerges as the most effective and promising coagulant for enhancing CUF process efficiency in coal mine wastewater treatment and extending the operational lifespan of RO membranes.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106911"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Understanding the difference between the nano and micro bubble size distributions generated by a regenerative turbine microbubble generator using ozone

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jwpe.2025.106963

Alexander John , Adam Brookes , Irene Carra , Bruce Jefferson , Peter Jarvis

There is a genuine paucity of data concerning the relative significance of the nano and the microbubble size distributions that are collectively generated when operating microbubble generation devices. Accordingly, the current work aimed to address this knowledge gap by measuring the two size distributions generated by a regenerative turbine microbubble generator using ozone and assess the relative significance of the nanobubble fraction. The microbubble fraction was measured with a focus-beam reflectance measurement device and the nanobubble fraction with a nano particle tracking instrument. The latter was calibrated using latex spheres to understand method uncertainty and to optimise the measurement approach. Sauter mean diameters of 217 nm and 37 μm were reported for the nano and microbubble fractions, respectively, with half of the microbubbles being <5000 nm in size. A comparison of the size and number concentrations of the different bubble types revealed that the majority of the gas was contained within the microbubble fraction, and hence, this controlled the overall mass transfer performance of the system. Further, the nanobubbles were observed to be stable for 18 h with little change in their size or number, indicating there was no net transfer of their gaseous contents. Overall, the work revealed that when considering enhancing gas-liquid mass transfer processes with micro-nano bubble generators, the microbubble fraction is key.

{"title":"Understanding the difference between the nano and micro bubble size distributions generated by a regenerative turbine microbubble generator using ozone","authors":"Alexander John , Adam Brookes , Irene Carra , Bruce Jefferson , Peter Jarvis","doi":"10.1016/j.jwpe.2025.106963","DOIUrl":"10.1016/j.jwpe.2025.106963","url":null,"abstract":"<div><div>There is a genuine paucity of data concerning the relative significance of the nano and the microbubble size distributions that are collectively generated when operating microbubble generation devices. Accordingly, the current work aimed to address this knowledge gap by measuring the two size distributions generated by a regenerative turbine microbubble generator using ozone and assess the relative significance of the nanobubble fraction. The microbubble fraction was measured with a focus-beam reflectance measurement device and the nanobubble fraction with a nano particle tracking instrument. The latter was calibrated using latex spheres to understand method uncertainty and to optimise the measurement approach. Sauter mean diameters of 217 nm and 37 μm were reported for the nano and microbubble fractions, respectively, with half of the microbubbles being <5000 nm in size. A comparison of the size and number concentrations of the different bubble types revealed that the majority of the gas was contained within the microbubble fraction, and hence, this controlled the overall mass transfer performance of the system. Further, the nanobubbles were observed to be stable for 18 h with little change in their size or number, indicating there was no net transfer of their gaseous contents. Overall, the work revealed that when considering enhancing gas-liquid mass transfer processes with micro-nano bubble generators, the microbubble fraction is key.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106963"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zeolite omega-confined silver nanoparticles AgNPs for antibacterial activities and catalytic reduction of organic contaminants

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jwpe.2025.106954

Abdelmadjid Belhadri , Bouhadjar Boukoussa , Fadila Benali , Amel Mekki , Adel Mokhtar , Mohammed Hachemaoui , Issam Ismail , Jibran Iqbal , Shashikant P. Patole , Inas Taha , Rachida Hamacha , Mohamed Abboud

Dyes have a significant impact on the environment, particularly in industrial sectors such as textile and food. One of the fastest reactions to reduce the toxicity of these pollutants is the reduction of dyes. This research employed a straightforward and efficient approach to confine omega zeolites with various concentrations of silver nanoparticles AgNPs (1, 2, 3, and 4 %). The resulting solids were used as catalysts to reduce methylene blue (MB), orange G (OG), methyl orange (MO) and 4-nitrophenol (4-NP) in a simple and binary system. It was found that AgNPs can be obtained at ultrafine sizes between 2 and 6 nm, with a high level of dispersibility on the zeolite surface. Both systems showed that the catalyst with a high AgNPs content was the most effective and selective with MB dye. The rate constant K_app values (for a simple system) varied in the following sequence: 0.590 s⁻¹, 0.0086 s⁻¹, 0.0046 s⁻¹, and 0.003 s⁻¹ for the pollutants (MB), (MO), (OG), (4-NP), respectively. In binary systems containing 4-NP/MB, MO/MB, and OG/MB, the zeolite confined with 4 % AgNPs. Reusing the catalyst ZO(4 %) in several cycles showed good results in terms of conversion and stability. AgNPs-confined zeolite omega showed the most marked antibacterial effects, with inhibition zones of 36 mm and 31 mm achieved for Escherichia coli E.c and Pseudomonas aeruginosa P.a, respectively. These values were higher than those found with the antibiotic gentamicin.

{"title":"Zeolite omega-confined silver nanoparticles AgNPs for antibacterial activities and catalytic reduction of organic contaminants","authors":"Abdelmadjid Belhadri , Bouhadjar Boukoussa , Fadila Benali , Amel Mekki , Adel Mokhtar , Mohammed Hachemaoui , Issam Ismail , Jibran Iqbal , Shashikant P. Patole , Inas Taha , Rachida Hamacha , Mohamed Abboud","doi":"10.1016/j.jwpe.2025.106954","DOIUrl":"10.1016/j.jwpe.2025.106954","url":null,"abstract":"<div><div>Dyes have a significant impact on the environment, particularly in industrial sectors such as textile and food. One of the fastest reactions to reduce the toxicity of these pollutants is the reduction of dyes. This research employed a straightforward and efficient approach to confine omega zeolites with various concentrations of silver nanoparticles AgNPs (1, 2, 3, and 4 %). The resulting solids were used as catalysts to reduce methylene blue (MB), orange G (OG), methyl orange (MO) and 4-nitrophenol (4-NP) in a simple and binary system. It was found that AgNPs can be obtained at ultrafine sizes between 2 and 6 nm, with a high level of dispersibility on the zeolite surface. Both systems showed that the catalyst with a high AgNPs content was the most effective and selective with MB dye. The rate constant K<sub>app</sub> values (for a simple system) varied in the following sequence: 0.590 s<sup>−1</sup>, 0.0086 s<sup>−1</sup>, 0.0046 s<sup>−1</sup>, and 0.003 s<sup>−1</sup> for the pollutants (MB), (MO), (OG), (4-NP), respectively. In binary systems containing 4-NP/MB, MO/MB, and OG/MB, the zeolite confined with 4 % AgNPs. Reusing the catalyst ZO(4 %) in several cycles showed good results in terms of conversion and stability. AgNPs-confined zeolite omega showed the most marked antibacterial effects, with inhibition zones of 36 mm and 31 mm achieved for <em>Escherichia coli</em> E.c and <em>Pseudomonas aeruginosa</em> P.a, respectively. These values were higher than those found with the antibiotic gentamicin.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 106954"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heterotrophic nitrification-aerobic denitrification (HNAD) in marine aquaculture wastewater treatment: Nitrogen removal performance, mechanism and microbial community characteristics

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jwpe.2025.107006

Mingyu Ning , Xing Li , Zedong Lu , Yanling Yang , Wenlu Liu

Nitrogen pollution resulting from the rapid development of mariculture poses a significant threat to marine ecosystems. Heterotrophic nitrification - aerobic denitrification microorganisms (HNADMs), which can achieve nitrification and denitrification simultaneously under aerobic conditions, have shown great potential in treating nitrogen pollution. In this study, a laboratory-scale heterotrophic nitrification - aerobic denitrification (HNAD) biofilm reactor was continuously operated for 72 days to evaluate its performance in treating marine recirculating aquaculture system wastewater (RAS wastewater) and traditional extensive pond aquaculture tailwater in marine farm (Pond tailwater). The results indicated that with ceramsite as the filter media and solid polyhydroxyalkanoates (PHA) as the carbon source, yielded the most effective and stable nitrogen removal. Under these optimal conditions, the system achieved simultaneous nitrification and denitrification by the 7th day, with total inorganic nitrogen removal efficiencies of 87.37 ± 4.23 % for RAS wastewater and 65.00 ± 8.35 % for pond tailwater. Dominant HNADMs were consistently found on both ceramsite and PHA surfaces across different water sources. A more complex microbial ecological network when treating pond tailwater compared to RAS wastewater was found, with key microorganisms predominantly from HNADMs. The species composition and abundance of nitrogen-transforming microorganisms vary with water quality and carrier type, with traditional nitrifying and denitrifying bacteria being relatively less prevalent and HNADMs more dominant. Overall, the HNAD biofilm reactor system effectively removed nitrogen from both RAS wastewater and pond tailwater, providing valuable insights for simultaneous nitrification and denitrification processes in mariculture wastewater treatment.

{"title":"Heterotrophic nitrification-aerobic denitrification (HNAD) in marine aquaculture wastewater treatment: Nitrogen removal performance, mechanism and microbial community characteristics","authors":"Mingyu Ning , Xing Li , Zedong Lu , Yanling Yang , Wenlu Liu","doi":"10.1016/j.jwpe.2025.107006","DOIUrl":"10.1016/j.jwpe.2025.107006","url":null,"abstract":"<div><div>Nitrogen pollution resulting from the rapid development of mariculture poses a significant threat to marine ecosystems. Heterotrophic nitrification - aerobic denitrification microorganisms (HNADMs), which can achieve nitrification and denitrification simultaneously under aerobic conditions, have shown great potential in treating nitrogen pollution. In this study, a laboratory-scale heterotrophic nitrification - aerobic denitrification (HNAD) biofilm reactor was continuously operated for 72 days to evaluate its performance in treating marine recirculating aquaculture system wastewater (RAS wastewater) and traditional extensive pond aquaculture tailwater in marine farm (Pond tailwater). The results indicated that with ceramsite as the filter media and solid polyhydroxyalkanoates (PHA) as the carbon source, yielded the most effective and stable nitrogen removal. Under these optimal conditions, the system achieved simultaneous nitrification and denitrification by the 7th day, with total inorganic nitrogen removal efficiencies of 87.37 ± 4.23 % for RAS wastewater and 65.00 ± 8.35 % for pond tailwater. Dominant HNADMs were consistently found on both ceramsite and PHA surfaces across different water sources. A more complex microbial ecological network when treating pond tailwater compared to RAS wastewater was found, with key microorganisms predominantly from HNADMs. The species composition and abundance of nitrogen-transforming microorganisms vary with water quality and carrier type, with traditional nitrifying and denitrifying bacteria being relatively less prevalent and HNADMs more dominant. Overall, the HNAD biofilm reactor system effectively removed nitrogen from both RAS wastewater and pond tailwater, providing valuable insights for simultaneous nitrification and denitrification processes in mariculture wastewater treatment.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"70 ","pages":"Article 107006"},"PeriodicalIF":6.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0