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Liu J, Fu W, Yu X, Yang H, Zhao D, Wang Z, Wang L, Li X, Tang CY. Relating critical and limiting fluxes to metastable and long-term stable fluxes in colloidal membrane filtration through collision-attachment theory. WATER RESEARCH 2023; 238:120010. [PMID: 37146393 DOI: 10.1016/j.watres.2023.120010] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 04/25/2023] [Accepted: 04/26/2023] [Indexed: 05/07/2023]
Abstract
In membrane technology for water/wastewater treatment, the concepts of critical flux (JC) and limiting flux (JL) suggest the existence of a threshold flux below which no fouling occurs. However, their important roles on stable flux duration have not been sufficiently understood. This work adopts a collision-attachment approach to clarify the relationship of JC, JL to metastable (i.e., short-term stable) and long-term stable fluxes based on their dependence on initial flux (J0), foulant-clean-membrane energy barrier (Ef-m), and foulant-fouled-membrane energy barrier (Ef-f). When J0 is below JL, water flux remains stable over a long time even for the case of J0 over JC, thanks to the strongly repulsive Ef-f. At J0 > JL and J0 > JC, the water flux is unstable at the beginning of filtration, and the flux ultimately decreases to JL as the long-term stable flux. Under the condition of JL < J0 ≤ JC, an initial metastable flux appears owing to the high Ef-m, with longer metastable period observed at lower J0 and for more hydrophilic/charged membrane or colloids. Nevertheless, rapid flux decline occurs subsequently due to the energy barrier shifting to weak Ef-f, and the water flux eventually degenerates to JL in long-term fouling duration. Our results provide significant guidelines for fouling control strategies with respect to membrane design, feedwater pretreatment, and operational optimization.
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Affiliation(s)
- Junxia Liu
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Wei Fu
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Xuri Yu
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Haiyan Yang
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, China.
| | - Dongsheng Zhao
- College of Civil Engineering and Architecture, Nanyang Normal University, Nanyang 473061, China
| | - Zhihong Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Lin Wang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China.
| | - Xianhui Li
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, China
| | - Chuyang Y Tang
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong
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Khezraqa H, Etemadi H, Salami-Kalajahi M, Shokri E. The effect of modified silica nanoparticles on the polycarbonate thin-film nanocomposite membranes in a submerged membrane system for the treatment of surface-contaminated water. Polym Bull (Berl) 2023. [DOI: 10.1007/s00289-023-04769-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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Echakouri M, Henni A, Salama A. High-Frequency Pulsatile Parameterization Study for the Titania Ceramic Membrane Fouling Mitigation in Oily Wastewater Systems Using the Box-Behnken Response Surface Methodology. MEMBRANES 2022; 12:1198. [PMID: 36557105 PMCID: PMC9788362 DOI: 10.3390/membranes12121198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/21/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
In this comprehensive study, a seven-channel ultrafiltration (UF) titania membrane was used to investigate the impact of the pulsatile cleaning process on the crossflow filtration system. Seventeen experimental runs were performed for different operating conditions with a transmembrane pressure (TMP) varying from 0.5 to 1.5 bar, a crossflow velocity (CFV) ranging from 0.5 to 1 m/s, and pulsatile parameters within an interval varying from 60 to 120 s with a duration of 0.8 s, and collecting membrane permeate flux and volume data. The optimized operating conditions revealed that a TMP of 1.5 bar, a CFV of 0.71 m/s, and a pulsatile cycle of 85 s were the best operating conditions to reach the highest steady permeability flux and volume of 302 LMH and 8.11 L, respectively. The UF ceramic membrane under the optimized inputs allowed for an oil-rejection ability of 99%. The Box-Behnken design (BBD) model was used to analyze the effect of crossflow operating conditions on the permeate flux and volume. The analysis of variance (ANOVA) indicated that the quadratic regression models were highly significant. At a 95% confidence interval, the optimum TMP significantly enhanced the flux and permeate volume simultaneously. The results also demonstrated a positive interaction between the TMP and the pulsatile process, enhancing the permeate flux with a slight impact on the permeate volume. At the same time, the interaction between the CFV and pulsatile flow improved the permeability and increased the permeate volume.
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Etemadi H, Kazemi R, Ghasemian N, Shokri E. Effect of Transmembrane Pressure on Antifouling Properties of PVC/Clinoptilolite Ultrafiltration Nanocomposite Membranes. Chem Eng Technol 2022. [DOI: 10.1002/ceat.202200097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Habib Etemadi
- University of Bonab Department of Polymer Science and Engineering 5551761167 Bonab Iran
| | - Rozita Kazemi
- University of Bonab Department of Polymer Science and Engineering 5551761167 Bonab Iran
| | - Naser Ghasemian
- University of Bonab Department of Chemical Engineering 5551761167 Bonab Iran
| | - Elham Shokri
- University of Bonab Department of Chemical Engineering 5551761167 Bonab Iran
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Novel polycarbonate membrane embedded with multi-walled carbon nanotube for water treatment: a comparative study between bovine serum albumin and humic acid removal. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03564-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Etemadi H, Afsharkia S, Zinatloo‐Ajabshir S, Shokri E. Effect of alumina nanoparticles on the antifouling properties of polycarbonate‐polyurethane blend ultrafiltration membrane for water treatment. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25764] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Habib Etemadi
- Department of Polymer Science and Engineering University of Bonab Bonab Iran
| | - Soheyla Afsharkia
- Department of Polymer Science and Engineering University of Bonab Bonab Iran
| | | | - Elham Shokri
- Department of Chemical Engineering University of Bonab Bonab Iran
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