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Qin Q, Yang G, Li J, Sun M, Jia H, Wang J. A review of flow field characteristics in submerged hollow fiber membrane bioreactor: Micro-interface, module and reactor. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 365:121525. [PMID: 38897085 DOI: 10.1016/j.jenvman.2024.121525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/27/2024] [Accepted: 06/16/2024] [Indexed: 06/21/2024]
Abstract
As an important part of the membrane field, hollow fiber membranes (HFM) have been widely concerned by scholars. HFM fouling in the industrial application results in a reduction in its lifespan and an increase in cost. In recent years, various explorations on the HFM fouling control strategies have been carried out. In the current work, we critically review the influence of flow field characteristics in HFM-based bioreactor on membrane fouling control. The flow field characteristics mainly refer to the spatial and temporal variation of the related physical parameters. In the HFM field, the physical parameter mainly refers to the variation characteristics of the shear force, flow velocity and turbulence caused by hydraulics. The factors affecting the flow field characteristics will be discussed from three levels: the micro-flow field near the interface of membrane (micro-interface), the flow field around the membrane module and the reactor design related to flow field, which involves surface morphology, crossflow, aeration, fiber packing density, membrane vibration, structural design and other related parameters. The study of flow field characteristics and influencing factors in the HFM separation process will help to improve the performance of HFM in full-scale water treatment plants.
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Affiliation(s)
- Qingwen Qin
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Guang Yang
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Juan Li
- State Key Laboratory of Separation Membranes and Membrane Processes, TianGong University, Tianjin, 300387, China; School of Environmental Science and Engineering, TianGong University, Tianjin, 300387, China
| | - Min Sun
- Centre for Complexity Science, Henan University of Technology, Zhengzhou, 450001, China
| | - Hui Jia
- State Key Laboratory of Separation Membranes and Membrane Processes, TianGong University, Tianjin, 300387, China; School of Environmental Science and Engineering, TianGong University, Tianjin, 300387, China.
| | - Jie Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, TianGong University, Tianjin, 300387, China; School of Environmental Science and Engineering, TianGong University, Tianjin, 300387, China; Cangzhou Institute of Tiangong University, Cangzhou, 061000, China.
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2
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Lee Y, Jeong S, Kim JH, Jeong S. Mechanism of Silica Nanoparticle-Induced Particulate Fouling in Vacuum Membrane Distillation. MEMBRANES 2024; 14:76. [PMID: 38668104 PMCID: PMC11051741 DOI: 10.3390/membranes14040076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 02/08/2024] [Accepted: 03/25/2024] [Indexed: 04/28/2024]
Abstract
Membrane distillation (MD) is a process driven by the vapor pressure difference dependent on temperature variation, utilizing a hydrophobic porous membrane. MD operates at low pressure and temperature, exhibiting resilience to osmotic pressure. However, a challenge arises as the membrane performance diminishes due to temperature polarization (TP) occurring on the membrane surface. The vacuum MD process leverages the application of a vacuum to generate a higher vapor pressure difference, enhancing the flux and mitigating TP issues. Nevertheless, membrane fouling leads to decreased performance, causing membrane wetting and reducing the ion removal efficiency. This study investigates membrane fouling phenomena induced by various silica nanoparticle sizes (400, 900, and 1300 nm). The patterns of membrane fouling, as indicated by the flux reduction, vary depending on the particle size. Distinct MD performances are observed with changes in the feed water temperature and flow rate. When examining the membrane fouling mechanism for particles with a porosity resembling actual particulate materials, a fouling form similar to the solid type is noted. Therefore, this study elucidates the impact of particulate matter on membrane fouling under diverse conditions.
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Affiliation(s)
| | | | | | - Sanghyun Jeong
- School of Civil and Environmental Engineering, Pusan National University, Busan 46241, Republic of Korea; (Y.L.); (J.-H.K.)
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3
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Huang H, Zeng S, Luo C, Long T. Separate effect of turbulent pulsation on internal mass transfer in porous biofilms. ENVIRONMENTAL RESEARCH 2023; 217:114972. [PMID: 36455631 DOI: 10.1016/j.envres.2022.114972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 11/25/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Turbulence is considered to be the result of coupled time-averaged and pulsating velocities, making it difficult to distinguish the respective effects, and the quantitative effect of turbulent pulsation alone on mass transfer within biofilms has not been discussed in the literature. In this study, we constructed a special oscillating grid biofilm reactor combining Particle Image Velocimetry (PIV) measurements and Computational Fluid Dynamics (CFD) simulations to achieve nearly isotropic turbulence in a designed ambient without time-averaged velocity and shear stress. Subsequently, velocity and contaminant concentration distributions were obtained by solving a mass transfer model with a k-ε turbulence model, combined with measurements of biofilm structure parameters. The results showed that the increase in turbulent pulsation intensity led to a significant stratification of the percolation velocity gradient in biofilms, which enhanced convective mass transfer. The changes of biofilm density and porosity under turbulent pulsation were more strongly correlated with convective mass transfer. When the turbulent intensity (q) increased to 2.50 cm s-1, the removal rate reached the highest value of 96.93%, accelerating the migration of contaminant concentration and the diffusive mass transfer effect was obvious. In addition, the trend of biofilm thickness under turbulent pulsation was consistent with the change of contaminant concentration distribution, and the correlation between them was greater. In summary, at q of 2.50 cm s-1, there was a positive effect on both convection and diffusion mechanisms in biofilms, and the contaminant removal rate and biofilm thickness reached the maximum, which was the recommended turbulent pulsation conditions.
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Affiliation(s)
- Haozhe Huang
- College of Environment and Ecology, Chongqing University, 400045, Chongqing, PR China
| | - Shi Zeng
- College of Environment and Ecology, Chongqing University, 400045, Chongqing, PR China
| | - Chao Luo
- College of Environment and Ecology, Chongqing University, 400045, Chongqing, PR China
| | - Tianyu Long
- College of Environment and Ecology, Chongqing University, 400045, Chongqing, PR China.
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PAC-UF Process Improving Surface Water Treatment: PAC Effects and Membrane Fouling Mechanism. MEMBRANES 2022; 12:membranes12050487. [PMID: 35629813 PMCID: PMC9143739 DOI: 10.3390/membranes12050487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 04/23/2022] [Accepted: 04/26/2022] [Indexed: 11/16/2022]
Abstract
In this study, the water purification effect and membrane fouling mechanism of two powdered activated carbons (L carbon and S carbon) enhancing Polyvinylidene Fluoride (PVDF) ultrafiltration (UF) membranes for surface water treatment were investigated. The results indicated that PAC could effectively enhance membrane filtration performance. With PAC addition, organic removal was greatly enhanced compared with direct UF filtration, especially for small molecules, i.e., the S-UF had an additional 25% removal ratio of micro-molecule organics than the direct UF. The S carbon with the larger particle size and lower specific surface area exhibited superior performance to control membrane fouling, with an operation duration of S-UF double than the direct UF. Therefore, the particle size and pore structure of carbon are the two key parameters that are essential during the PAC-UF process. After filtration, acid and alkaline cleaning of UF was conducted, and it was found that irreversible fouling contributed the most to total filtration resistance, while the unrecoverable irreversible resistance ratio with acid cleaning was greater than that with alkaline cleaning. With PAC, irreversible UF fouling could be relieved, and thus, the running time could be extended. In addition, the membrane foulant elution was analyzed, and it was found to be mainly composed of small and medium molecular organic substances, with 12% to 21% more polysaccharides than proteins. Finally, the hydrophilicity of the elution was examined, and it was observed that alkaline cleaning mainly eluted large, medium, and small molecules of hydrophilic and hydrophobic organic matter, while acid cleaning mainly eluted small molecules of hydrophilic organic matter.
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5
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Study on the Control of Membrane Fouling by Pulse Function Feed and CFD Simulation Verification. MEMBRANES 2022; 12:membranes12040362. [PMID: 35448331 PMCID: PMC9026926 DOI: 10.3390/membranes12040362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/22/2022] [Accepted: 03/22/2022] [Indexed: 02/04/2023]
Abstract
A complex-function fluid controller placed in front of a membrane module was used to control the velocity change with feed fluid and reduce membrane fouling. Using humic acid as the simulated pollutant, the effects of the square wave function, sine function, reciprocal function, and power function feeding on the membrane flux were investigated. For sine function feeding, the membrane-specific flux was the largest and was maintained above 0.85 under the intermittent frequency of 9 s. Compared with the final membrane-specific flux with steady-flow feeding of 0.55, functional feeding could significantly reduce membrane fouling. SEM results showed that sine feeding led to slight contamination on the membrane surface. Furthermore, the Computational Fluid Dynamics (CFD) simulation results showed that the shear force of sine function feeding was about three times that of the steady flow (6 × 105 N). Compared with steady feeding, functional feeding could significantly improve the shear force on the membrane surface and reduce membrane fouling.
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Simultaneous coupling of fluidized granular activated carbon (GAC) and powdered activated carbon (PAC) with ultrafiltration process: A promising synergistic alternative for water treatment. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120085] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Dahiya D, Pugazhenthi G, Kumar M, Vasanth D. Separation of bacteria Kocuria rhizophila BR-1 from its broth during synthesis of gold nanoparticles using ceramic membrane by shear-enhanced filtration process. CHEMOSPHERE 2021; 281:130761. [PMID: 34022603 DOI: 10.1016/j.chemosphere.2021.130761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 03/31/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
In the present study, disc type ceramic membranes made from China clay, quartz and calcium carbonate were used for the separation of bacteria Kocuria rhizophila from its broth by shear-enhanced filtration process. Porosity, water permeability and average pore size of the membrane were 42%, 3.24 × 10-4 L m-2 h-1 Pa-1 and 180 nm, respectively. The membrane exhibited good chemical tolerance in acid, alkali and chlorine solutions. The effect of trans-membrane pressure and rotational speed on permeate flux and bacterial rejection was investigated. It was found that the permeate flux increased (40-163.5 L m-2 h-1) and bacterial rejection decreased (99.2-94.5%) with increasing pressure (69-345 kPa). With an increase in rotation (50-250 rpm), the permeate flux increased from 156.5 to 176.8 L m-2 h-1, while bacterial rejection decreased from 94.3 to 83.2%. The pressure of 345 kPa and rotational speed of 250 rpm with flux of 176.8 L m-2 h-1 and rejection of 83% was selected as an optimum process condition. The analysis of fouling models revealed that the cake filtration model provided the highest R2 (0.89) value followed by intermediate pore blocking (0.87) which indicates that cake filtration model has the best fit with the experimental data. Henceforth, the shear enhanced filtration process used in this study can be considered as a pertinent filtration process for efficient recovery of biological products at industrial scale.
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Affiliation(s)
- Digvijay Dahiya
- Department of Biotechnology, National Institute of Technology Raipur, Raipur, Chhattisgarh, 492010, India
| | - G Pugazhenthi
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Amingaon, Guwahati, Assam, 781039, India
| | - Mohit Kumar
- Department of Biotechnology, National Institute of Technology Raipur, Raipur, Chhattisgarh, 492010, India
| | - D Vasanth
- Department of Biotechnology, National Institute of Technology Raipur, Raipur, Chhattisgarh, 492010, India.
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8
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Yu H, Huang W, Liu H, Li T, Chi N, Chu H, Dong B. Application of Coagulation-Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment. MEMBRANES 2021; 11:membranes11080643. [PMID: 34436406 PMCID: PMC8398328 DOI: 10.3390/membranes11080643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/14/2021] [Accepted: 08/18/2021] [Indexed: 11/16/2022]
Abstract
The combination of conventional and advanced water treatment is now widely used in drinking water treatment. However, membrane fouling is still the main obstacle to extend its application. In this study, the impact of the combination of coagulation and ultrafiltration (UF) membrane rotation on both fouling control and organic removal of macro (sodium alginate, SA) and micro organic matters (tannic acid, TA) was studied comprehensively to evaluate its applicability in drinking water treatment. The results indicated that membrane rotation could generate shear stress and vortex, thus effectively reducing membrane fouling of both SA and TA solutions, especially for macro SA organics. With additional coagulation, the membrane fouling could be further reduced through the aggregation of mediate and macro organic substances into flocs and elimination by membrane retention. For example, with the membrane rotation speed of 60 r/min, the permeate flux increased by 90% and the organic removal by 35% in SA solution, with 40 mg/L coagulant dosage, with an additional 70% increase of flux and 5% increment of organic removal to 80% obtained. However, too much shear stress could intensify the potential of fiber breakage at the potting, destroying the flocs and resulting in the reduction of permeate flux and deterioration of effluent quality. Finally, the combination of coagulation and membrane rotation would lead to the shaking of the cake layer, which is beneficial for fouling mitigation and prolongation of membrane filtration lifetime. This study provides useful information on applying the combined process of conventional coagulation and the hydrodynamic shear force for drinking water treatment, which can be further explored in the future.
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Affiliation(s)
- Hongjian Yu
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; (H.Y.); (W.H.); (H.L.); (H.C.); (B.D.)
| | - Weipeng Huang
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; (H.Y.); (W.H.); (H.L.); (H.C.); (B.D.)
| | - Huachen Liu
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; (H.Y.); (W.H.); (H.L.); (H.C.); (B.D.)
| | - Tian Li
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; (H.Y.); (W.H.); (H.L.); (H.C.); (B.D.)
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
- Correspondence:
| | - Nianping Chi
- School of Municipal and Geomatics Engineering, Hunan City University, Yiyang 413000, China;
| | - Huaqiang Chu
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; (H.Y.); (W.H.); (H.L.); (H.C.); (B.D.)
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
| | - Bingzhi Dong
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; (H.Y.); (W.H.); (H.L.); (H.C.); (B.D.)
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
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9
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A review of the current in-situ fouling control strategies in MBR: Biological versus physicochemical. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.03.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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10
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Jiang S, Xiao S, Chu H, Zhao F, Yu Z, Zhou X, Zhang Y. Intelligent mitigation of fouling by means of membrane vibration for algae separation: Dynamics model, comprehensive evaluation, and critical vibration frequency. WATER RESEARCH 2020; 182:115972. [PMID: 32650150 DOI: 10.1016/j.watres.2020.115972] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/20/2020] [Accepted: 05/23/2020] [Indexed: 06/11/2023]
Abstract
Vibration membrane filtration has been confirmed as an effective method to improve algae separation from water. However, the fouling evolution process and the antifouling mechanism are not well understood. In this study, a novel hybrid method based on a dynamics model was proposed, a comprehensive evaluation was conducted, and the critical vibration frequency for accurate analysis and prediction of membrane fouling was developed. The dynamics model was studied with an improved collision-attachment model by considering all the concurrent and synergistic effects of the hydrodynamic interactions acting on algae. From the perspective of potential energy, the improved model systematically elucidated the reason why the antifouling performance was enhanced when the vibration frequency varied from 1 Hz to 5 Hz. In addition, the Technique for Order Preference by Similarity to Ideal Solution-grey relational analysis (TOPSIS-GRA) method with combined weights was incorporated for the first time to provide direct comprehensive evaluation evidence to determine the effect of the vibration frequency on membrane fouling. It was found that increasing the vibration frequency could not alleviate membrane fouling caused by extracellular organic matter. Moreover, the concept of a critical vibration frequency was proposed using genetic algorithm optimized back propagation neural network, and the energy consumption was analyzed. This combination could provide an effective means to choose the most appropriate vibration frequency, thereby improving the efficiency of the vibration membrane system in the algae separation process.
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Affiliation(s)
- Shuhong Jiang
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China
| | - Shaoze Xiao
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China
| | - Huaqiang Chu
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China.
| | - Fangchao Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China
| | - Zhenjiang Yu
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China
| | - Xuefei Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China.
| | - Yalei Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China.
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11
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A new modeling approach for flux declining behavior during the filtration of oily-water systems due to coalescence and clustering of oil droplets: Experimental and multicontinuum investigation. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.115688] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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A comparative study on nitric oxide and hypochlorite as a membrane cleaning agent to minimise biofilm growth in a membrane bioreactor (MBR) process. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.04.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Tan YZ, Mao Z, Zhang Y, Tan WS, Chong TH, Wu B, Chew JW. Enhancing fouling mitigation of submerged flat-sheet membranes by vibrating 3D-spacers. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.12.085] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Rouquié C, Dahdouh L, Delalonde M, Wisniewski C. New prospects for immersed hollow-fiber membranes in fruit juices microfiltration: Case of grapefruit juice. J FOOD ENG 2019. [DOI: 10.1016/j.jfoodeng.2018.11.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Zhang G, Lv J, Yang F. Optimized anti-biofouling performance of bactericides/cellulose nanocrystals composites modified PVDF ultrafiltration membrane for micro-polluted source water purification. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 79:1437-1446. [PMID: 31169501 DOI: 10.2166/wst.2019.137] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The covalently functionalized cellulose nanocrystal (CNC) composites were synthesized by bonding common bactericides, such as dodecyl dimethyl benzyl ammonium chloride (DDBAC), ZnO and graphene oxide (GO) nanosheets, onto the CNC's surface. Then, the DDBAC/CNC, ZnO/CNC and GO/CNC nanocomposites modified polyvinylidene fluoride (PVDF) ultrafiltration membranes were fabricated by a simple one-step non-solvent induced phase separation (NIPS) process. The resultant hybrid membranes possessed porous and rough surfaces with more finger-like macropores that even extended through the entire cross-section. The hydrophilicity, permeability, antibacterial and antifouling performance and mechanism of the hybrid ultrafiltration membranes were evaluated and compared in detail, aiming at screening a superior hybrid membrane for practical application in micro-polluted source water purification. Among these newly-developed hybrid membranes, GO/CNC/PVDF exhibited an enhanced perm-selectivity with a water flux of 230 L/(m2 h bar) and humic acid rejection of 92%, the improved antibacterial activity (bacteriostasis rate of 93%) and antifouling performance (flux recovery rate (FRR) of >90%) being due to the optimized pore structure, higher surface roughness, incremental hydrophilicity and electronegativity. A lower biofouling level after three weeks' filtration of the actual micro-polluted source water further demonstrated that embedding the hydrophilic and antibacterial GO/CNC nanocomposite into the polymer matrix is an effective strategy to improve membrane anti-biofouling ability.
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Affiliation(s)
- Guoquan Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116023, China E-mail: ; The first two authors contributed equally to this work
| | - Jinling Lv
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116023, China E-mail: ; The first two authors contributed equally to this work
| | - Fenglin Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116023, China E-mail:
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16
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17
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Qin L, Zhang Y, Xu Z, Zhang G. Advanced membrane bioreactors systems: New materials and hybrid process design. BIORESOURCE TECHNOLOGY 2018; 269:476-488. [PMID: 30139558 DOI: 10.1016/j.biortech.2018.08.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 08/14/2018] [Accepted: 08/16/2018] [Indexed: 05/26/2023]
Abstract
Membrane bioreactor (MBR) is deemed as one of the most powerful technologies for efficient municipal and industrial wastewater treatment around the world. However, low microbial activity of activated sludge and serious membrane fouling still remain big challenges in worldwide application of MBR technology. Nowadays, more and more progresses on the research and development of advanced MBR with new materials and hybrid process are just on the way. In this paper, an overview on the perspective of high efficient strains applied into MBR for biological activity enhancement and fouling reduction is provided first. Secondly, as emerging fouling control strategy, design and fabrication of novel anti-fouling composited membranes are comprehensively highlighted. Meanwhile, hybrid MBR systems integrated with some novel dynamic membrane modules and/or with other technologies like advanced oxidation processes (AOPs) are introduced and compared. Finally, the challenges and opportunities of advanced MBRs combined with bioenergy production in wastewater treatment are discussed.
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Affiliation(s)
- Lei Qin
- Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Yufan Zhang
- College of Engineering, University of California, Berkeley, CA 94720, USA; Department of Mechanical Engineering, College of Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Zehai Xu
- Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Guoliang Zhang
- Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, PR China.
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18
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Zoubeik M, Salama A, Henni A. A novel antifouling technique for the crossflow filtration using porous membranes: Experimental and CFD investigations of the periodic feed pressure technique. WATER RESEARCH 2018; 146:159-176. [PMID: 30243059 DOI: 10.1016/j.watres.2018.09.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/09/2018] [Accepted: 09/08/2018] [Indexed: 06/08/2023]
Abstract
Oily water production is one of the many drawbacks of petroleum and several other industries. Finding effective ways for the treatment of produced water remain one of the main areas of interest in membrane sciences. Albeit the many advantages of membrane technology, they suffer from the unavoidable problem of fouling, which results from the accumulation of dispersed materials at the surface of membranes. Membrane modification and operational optimization have been approached as a potential cure of the problem of fouling. In this work we introduce a new and novel method that minimizes the development of fouling and in the same time utilizes no chemicals (i.e., environmentally friendly). The core of this method is based on alternating the pressure in the feed channel in a periodic manner and is therefore named the periodic feed pressure technique, PFPT. The idea is to make pinned droplets at the surface of the membrane lose essential forces that keep them sticking to the surface. The drag force due to permeation flux and the capillary force due to interfacial tension represents the two forces that largely contribute to the pinning of oil droplets at the surface of the membrane. Other forces including buoyancy and lift forces are generally small to be of significant influence. The idea of the PFPT is, therefore, to eliminate the force due to permeation drag. This is done by setting the transmembrane pressure (TMP) to zero at fixed intervals allowing pinned oil droplets to dislodge the surface. When the TMP is set to zero, permeation flux stops and the force due to permeation drag vanishes. This significantly reduces the overall residence time of pinned oil droplets, minimizing the chance for other oil droplets to cluster and coalesce with pinned ones. The PFPT does not cause any damage to the support layer of the polymeric membrane, which is a drawback of back-flushing methodology. The novel PFPT displays minimal membrane fouling and very similar permeation recovery despite only half the cycle time is in filtration mode. In this work, we show how the permeation flux is recovered and provide comparisons between the PFPT and regular filtration methodology. Furthermore, we compare the overall amount of filtrate at the end of the experiments using both methods. It is interesting to note that, the amount of filtrate using the PFPT is very much comparable to that obtained using regular filtration methodology and even higher. By optimizing the frequency of the cycle and the amplitude of the pressure change, it is possible to customize the PFPT to various membrane technologies and to achieve the highest recovery of the flux. Visual inspections of the membranes post operation and post rinsing indicate that membranes undergoing filtration using the PFPT achieves a very clean surface compared with those undergoing regular filtration processes. This method is a promising solution to membrane fouling that is easy to implement without any additional use of chemicals or equipment. Computational fluid dynamics (CFD) investigation is also conducted on microfiltration processes to show why this technique works.
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Affiliation(s)
- Mohamed Zoubeik
- Produced Water Laboratory, University of Regina, Wascana Parkway, Regina, S4S 0A2, SK, Canada
| | - Amgad Salama
- Produced Water Laboratory, University of Regina, Wascana Parkway, Regina, S4S 0A2, SK, Canada.
| | - Amr Henni
- Produced Water Laboratory, University of Regina, Wascana Parkway, Regina, S4S 0A2, SK, Canada
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19
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Investigation of the onset of dislodgment of a nonpermeating oil droplet at a membrane surface: Standard models and a new force balance model. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.08.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Mororó RR, Borges CP, Kronemberger FDA. New modules for membrane bioreactors: Improving fouling control. Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.05.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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21
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Wang J, Wu B, Liu Y, Fane AG, Chew JW. Monitoring local membrane fouling mitigation by fluidized GAC in lab-scale and pilot-scale AnFMBRs. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.01.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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23
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Wang B, Zhang K, Field RW. Slug bubbling in flat sheet MBRs: Hydrodynamic optimization of membrane design variables through computational and experimental studies. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2017.11.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Qi P, Lin L, Huang R, Zhao S, Tian H, Li S, Zhang Q, Liu W. Image Fiber-Based Miniature Suspended Solid Sensor with High Accuracy and a Large Dynamic Range. Sci Rep 2017; 7:16798. [PMID: 29196640 PMCID: PMC5711881 DOI: 10.1038/s41598-017-17003-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 11/20/2017] [Indexed: 11/10/2022] Open
Abstract
An image fiber-based miniature suspended solid sensor has been demonstrated. The diameter of the sensor is only a few millimeters. A superhydrophobic material is coated on the end of the image fiber to avoid the adsorption of suspended solids and bubbles. Multiple parameters, including mass concentration, morphology and particle sizes of suspended solids, can be visually measured in real time. Dynamic ranges of 0 ~100 kg/m3, full range accuracies of ±2‰ and a response time of 0.05 s were experimentally realized for the mass concentration measurements. Determinations of particle sizes of the suspended solids are also presented by means of digital image processing. This new technique will significantly advance ultralow-intrusion measurements in studies on the dynamics of suspended solids.
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Affiliation(s)
- Pengfei Qi
- Institute of Modern Optics, Nankai University, Key Laboratory of Optical Information Science and Technology, Ministry of Education, Tianjin, 300350, China
| | - Lie Lin
- Institute of Modern Optics, Nankai University, Key Laboratory of Optical Information Science and Technology, Ministry of Education, Tianjin, 300350, China
| | - Rui Huang
- State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300072, China
| | - Sicong Zhao
- Institute of Modern Optics, Nankai University, Key Laboratory of Optical Information Science and Technology, Ministry of Education, Tianjin, 300350, China
| | - Haolin Tian
- Institute of Modern Optics, Nankai University, Key Laboratory of Optical Information Science and Technology, Ministry of Education, Tianjin, 300350, China
| | - Shuai Li
- Institute of Modern Optics, Nankai University, Key Laboratory of Optical Information Science and Technology, Ministry of Education, Tianjin, 300350, China
| | - Qinghe Zhang
- State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300072, China
| | - Weiwei Liu
- Institute of Modern Optics, Nankai University, Key Laboratory of Optical Information Science and Technology, Ministry of Education, Tianjin, 300350, China.
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25
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Ma Z, Lu X, Wu C, Liu C, Liu Z, Zhang H. Assessment of combination of pressure-relief pulsation flow and diatomite filter-aid in membrane fouling control. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.07.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7080765] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Increasing the vibration frequency to mitigate reversible and irreversible membrane fouling using an axial vibration membrane in microalgae harvesting. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.01.039] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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In-situ monitoring techniques for membrane fouling and local filtration characteristics in hollow fiber membrane processes: A critical review. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.01.030] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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29
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Pourbozorg M, Li T, Law AWK. Fouling of submerged hollow fiber membrane filtration in turbulence: Statistical dependence and cost-benefit analysis. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.08.064] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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30
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Quan Q, Chang B, Meng HY, Liu RX, Wang Y, Lu SB, Peng J, Zhao Q. Use of electrospinning to construct biomaterials for peripheral nerve regeneration. Rev Neurosci 2016; 27:761-768. [PMID: 27428846 DOI: 10.1515/revneuro-2016-0032] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 05/26/2016] [Indexed: 12/16/2022]
Abstract
AbstractA number of limitations associated with the use of hollow nerve guidance conduits (NGCs) require further discussion. Most importantly, the functional recovery outcomes after the placement of hollow NGCs are poor even after the successful bridging of peripheral nerve injuries. However, nerve regeneration scaffolds built using electric spinning have several advantages that may improve functional recovery. Thus, the present study summarizes recent developments in this area, including the key cells that are combined with the scaffold and associated with nerve regeneration, the structure and configuration of the electrospinning design (which determines the performance of the electrospinning scaffold), the materials the electrospinning fibers are composed of, and the methods used to control the morphology of a single fiber. Additionally, this study also discusses the processes underlying peripheral nerve regeneration. The primary goals of the present review were to evaluate and consolidate the findings of studies that used scaffolding biomaterials built by electrospinning used for peripheral nerve regeneration support. It is amazing that the field of peripheral nerve regeneration continues to consistently produce such a wide variety of innovative techniques and novel types of equipment, because the introduction of every new process creates an opportunity for advances in materials for nerve repair.
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A novel insight into membrane fouling mechanism regarding gel layer filtration: Flory-Huggins based filtration mechanism. Sci Rep 2016; 6:33343. [PMID: 27627851 PMCID: PMC5024131 DOI: 10.1038/srep33343] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 08/25/2016] [Indexed: 11/20/2022] Open
Abstract
This study linked the chemical potential change to high specific filtration resistance (SFR) of gel layer, and then proposed a novel membrane fouling mechanism regarding gel layer filtration, namely, Flory-Huggins based filtration mechanism. A mathematical model for this mechanism was theoretically deduced. Agar was used as a model polymer for gel formation. Simulation of the mathematical model for agar gel showed that volume fraction of polymer and Flory-Huggins interaction parameter were the two key factors governing the gel SFR, whereas, pH and ionic strength were not related with the gel SFR. Filtration tests of gel layer showed that the total SFR value, effects of pH and ionic strength on the gel SFR well agreed with the perditions of model’s simulation, indicating the real occurrence of this mechanism and the feasibility of the proposed model. This mechanism can satisfactorily explain the extremely high SFR of gel layer, and improve fundamental insights into membrane fouling regarding gel layer filtration.
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