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Tang J, Cheng Z, Zhang X, Sun J, Liu Z, Zhang H, Tan S, Qiu F. Continuous ultrasonic ozone coupling technology-assisted control of ceramic membrane fouling coupled enhanced multiphase mixing to treat dye wastewater and CFD flow field simulation. ULTRASONICS SONOCHEMISTRY 2024; 104:106839. [PMID: 38452711 PMCID: PMC10924065 DOI: 10.1016/j.ultsonch.2024.106839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 02/07/2024] [Accepted: 02/27/2024] [Indexed: 03/09/2024]
Abstract
In this study, ozone catalysts (hydrogenation-modified red mud, HM-RM) successfully prepared by hydrogenation-modification of industrial hazardous solid waste red mud (RM) as a raw material in accordance with the viewpoint of treating waste with waste and using waste. Meanwhile, as for the common phenomenon of membrane fouling, uneven distribution of multiphase solid catalysts and ozone in liquids, the addition of ultrasound can not only disperse materials, but also play a role in online cleaning of ceramic membranes and catalysts. The optimum treatment conditions for Rhodamine B (RhB) solution with volume of 2 L and concentration of 40 mg/L were catalyst concentration of 0.4 mg/L, reaction temperature of 45 °C, ultrasonic time of 1 h, ultrasonic intensity of 600 W, removal rate of RhB was up to 90 %. In addition, the computational fluid dynamics (CFD) simulation method was used to investigate the fluid flow between the two gas-liquid phases and the effect of the negative pressure of the membrane pump on the fluid by the analysis of flow, pressure and ozone flux of the ceramic membrane(CM) reaction apparatus. The CFD simulation results showed that at the inlet gas-liquid flow rate of 3 m/s and the negative pressure of 20,000 Pa, the maximum flow rates of CM-1 were 3 m/s, 0.752 m/s for CM-2, and 0.228 m/s for CM-3, respectively. Vortices, which are beneficial to solid-liquid mixing and gas-liquid mass transfer, formed between the suction port CM-1 of CM-1 and the inlets of CM-2 and CM-3. This discovery is consistent with relevant experimental research results. Significantly higher concentrations of both •OH and dissolved ozone were observed in the US/HM-RM/O3 system compared to other systems, indicating the significant improvement in ozone utilization rate through the application of ultrasound. The superiority of the US/HM-RM/O3 device was demonstrated. The real dye effluent was tested under optimum operating conditions and the results showed that COD and TOC were reduced by 81.34 % and 60.23 % respectively after 180 min of treatment. The above research can provide technical support for the treatment of dye wastewater using Ultrasound-enhanced ozone oxidation ceramic membranes.
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Affiliation(s)
- Jinshan Tang
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, PR China
| | - Zhiliang Cheng
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, PR China.
| | - Xuan Zhang
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, PR China
| | - Jinyu Sun
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, PR China
| | - Zhaoqiang Liu
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, PR China
| | - Hao Zhang
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, PR China
| | - Shengmei Tan
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, PR China
| | - Facheng Qiu
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, PR China.
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2
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Zhang R, Hao L, Cheng K, Xin B, Sun J, Guo J. Research progress of electrically-enhanced membrane bioreactor (EMBR) in pollutants removal and membrane fouling alleviation. CHEMOSPHERE 2023; 331:138791. [PMID: 37105306 DOI: 10.1016/j.chemosphere.2023.138791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 04/11/2023] [Accepted: 04/24/2023] [Indexed: 05/19/2023]
Abstract
Membrane bioreactor (MBR), as a biological unit for wastewater treatment, has been proven to have the advantages of simple structure and high pollutant removal rate. However, membrane fouling limits its wide application, and it is crucial to adopt effective membrane fouling control methods. As a new type of membrane fouling control technology, electrically-enhanced MBR (EMBR) has attracted more interest recently. It uses the driving force of electric field to make pollutants flocculate or move away from the membrane surface to achieve the purpose of inhibiting membrane fouling. This paper expounds the configuration of EMBR in recent years, including the location of membrane components, the way of electric field application and the selection of electrode and membrane materials, and provides the latest development information in various aspects. The enhanced effect of electric field on the removal of comprehensive and refractory pollutants is outlined in detail. And from the perspective of sludge properties (EPS, SMP, sludge particle size, zeta potential and microbial activity), the influence of electric field on sludge characteristics and the relationship between the changes of sludge properties in EMBR and membrane fouling are discussed. Moreover, the electrochemical mechanisms of electric field alleviating membrane fouling are elucidated from electrophoresis, electrostatic repulsion, electroflocculation, electroosmosis, and electrochemical oxidation, and the regeneration and stability of EMBR are assessed. The existing challenges and future research directions are also proposed. This review could provide theoretical guidance and further studies for subsequent topic, and promoting the wide engineering applications of EMBR.
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Affiliation(s)
- Rong Zhang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment Chang'an University, Xi'an, 710054, PR China.
| | - Liying Hao
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment Chang'an University, Xi'an, 710054, PR China.
| | - Kai Cheng
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment Chang'an University, Xi'an, 710054, PR China.
| | - Beiyu Xin
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment Chang'an University, Xi'an, 710054, PR China.
| | - Junqi Sun
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment Chang'an University, Xi'an, 710054, PR China.
| | - Jifeng Guo
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment Chang'an University, Xi'an, 710054, PR China.
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3
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Wang H, Wang J, Zhao J, Zhang H, Liu L, Sun X, Li G, Liang H. Interaction between MIL-101(Cr) and natural organic matter in an integrated MOF-UF system. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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4
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Mehmood CT, Tan W, Chen Y, Waheed H, Li Y, Xiao Y, Zhong Z. UV/O3 assisted ceramic membrane reactor for efficient fouling control and DOM transformations in real textile wastewater. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121284] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Dong Y, Wu H, Yang F, Gray S. Cost and efficiency perspectives of ceramic membranes for water treatment. WATER RESEARCH 2022; 220:118629. [PMID: 35609431 DOI: 10.1016/j.watres.2022.118629] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/12/2022] [Accepted: 05/15/2022] [Indexed: 06/15/2023]
Abstract
More robust ceramic membranes with tailorable structures and functions are increasingly employed for water treatment, particularly in some harsh applications for their ultra-long service lifespan due to their high mechanical, structural, chemical and thermal stability and anti-fouling properties. Decreasing cost and enhancing efficiency are two key but quite challenging application-oriented issues for broader and larger-scale engineering application of current ceramic membranes, and are required to make ceramic membranes a highly efficient and economic water treatment technique. In this review, we critically discuss these two significant concerns of both cost and efficiency for water treatment ceramic membranes, focusing on an overview of various advanced strategies and mechanism insights. A brief up-to-date discussion is first introduced about recent developments of ceramic membranes covering the major advances of novel membranes and applications. Then some promising strategies for decreasing the cost of ceramic membranes are discussed, including membrane material cost and processing cost. To fully address the issue of moderate efficiency with single separation function, valuable and considerable insights are provided into recent major progress and mechanism understandings in application with other unit processes, such as advanced oxidation and electrochemistry techniques, to significantly enhance treatment efficiency. Subsequently, a review of recent ceramic membrane applications emphasizing harsh operating environments is presented, such as oil-water separation, saline water, refractory organic and emerging contaminant wastewater treatment. Finally, engineering application, conclusions, and future perspectives of ceramic membrane for water treatment applications are critically discussed offering new insight based on understanding the issues of cost and efficiency.
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Affiliation(s)
- Yingchao Dong
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
| | - Hui Wu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Fenglin Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Stephen Gray
- Institute for Sustainable Industries & Liveable Cities, Victoria University, PO Box 14428, Melbourne, Australia
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6
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Ranzinger F, Horn H, Wagner M. Imaging of particle deposition and resulting flow field during flocculation filtration within a granulated activated carbon filter. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Oxidation-biotreatment-membrane combined process for external reuse of shale gas wastewater. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Xu L, Wei C, Siddique MS, Yu W. Insight into the effect of in-situ galvanic micro-coagulation on membrane fouling mitigation treating surface water. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Hu J, Fu W, Ni F, Zhang X, Yang C, Sang J. An integrated process for the advanced treatment of hypersaline petrochemical wastewater: A pilot study. WATER RESEARCH 2020; 182:116019. [PMID: 32544732 DOI: 10.1016/j.watres.2020.116019] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/31/2020] [Accepted: 06/04/2020] [Indexed: 06/11/2023]
Abstract
An integrated process combining ozonation, ceramic membrane filtration with biological activated carbon filtration (O3+CMF + BAC process) was designed and evaluated using a pilot scale (10 m3/d) test for the advanced treatment of hypersaline petrochemical wastewater in a coastal wastewater plant. The membrane flux and ozone dosage were optimized for the optimal treatment performance of this integrated process. The results showed that this integrated process performed well in pollutant removal. The concentrations of CODCr, phosphate and color in the effluents were 17.9 mg/L, 0.25 mg/L, and 5 dilution times in average, respectively. The effluent quality met the local discharge standard even under a high influent COD concentration (195 mg/L in average). The synergistic effect of the ozonation and ceramic membrane filtration was investigated through the fluorescence characteristics and hydrophobic/hydrophilic properties of organic compounds. It revealed that ozonation mitigated the membrane fouling and the nanopores in the ceramic membranes enhanced the ozonation efficiency. Meanwhile, the Fenton process had a slightly better effluent quality than the integrated process, but Fenton process consumed much more chemicals and required the sludge disposal, resulting in higher cost. The estimated unit cost for this integrated process was only 34% of that for the Fenton process. Overall, the integrated process demonstrated high stability, reliable effluents and low cost, providing a promising and cost-efficient technology for the treatment of hypersaline petrochemical wastewater.
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Affiliation(s)
- Jinting Hu
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Wanyi Fu
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China; Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen, 518055, China.
| | - Fan Ni
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Xihui Zhang
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China; Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen, 518055, China.
| | - Chunpeng Yang
- Research Institute of Petroleum Processing, Sinopec, Beijing, 100083, China
| | - Junqiang Sang
- Research Institute of Petroleum Processing, Sinopec, Beijing, 100083, China
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10
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Yin Z, Wen T, Li Y, Li A, Long C. Alleviating reverse osmosis membrane fouling caused by biopolymers using pre-ozonation. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117546] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Sha J, Lu Z, Ye J, Wang G, Hu Q, Chen Y, Zhang X. The inhibition effect of recycled Scenedesmus acuminatus culture media: Influence of growth phase, inhibitor identification and removal. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101612] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Li K, Wen G, Li S, Chang H, Shao S, Huang T, Li G, Liang H. Effect of pre-oxidation on low pressure membrane (LPM) for water and wastewater treatment: A review. CHEMOSPHERE 2019; 231:287-300. [PMID: 31129410 DOI: 10.1016/j.chemosphere.2019.05.081] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/10/2019] [Accepted: 05/11/2019] [Indexed: 05/26/2023]
Abstract
Low pressure membrane (LPM) filtration is a promising technology for drinking water production, wastewater reclamation as well as pretreatment for seawater desalination. However, wider implementation of LPM is restricted by their inherent drawbacks, i.e., membrane fouling and insufficient rejection for dissolved contaminants. Pretreatment of feed water is a major method to improve the performance of LPM, and pre-oxidation has gained extensive attention because it can significantly alter compositions and properties of feed water through chemical reactions. This paper attempts to systematically review efficiency and mechanisms of pre-oxidation in membrane fouling control and permeate water quality improvement. On the basis of briefly discussing major foulants and fouling mechanisms of LPM, advantages and disadvantages of pre-oxidation in mitigating organic fouling, inorganic fouling and biofouling are discussed in detail. Impacts of pre-oxidation on removal of micropollutants, bulk organic matter and inorganic pollutants are summarized, and potential by-products of different oxidants are presented. As a prerequisite for the integration of chemical oxidation with LPM filtration, compatibility of membrane with oxidants at low concentration and long exposure time are highlighted. Finally, the existing challenges and future research needs in practical application of chemical oxidation to improve performance of LPM are also discussed.
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Affiliation(s)
- Kai Li
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China.
| | - Gang Wen
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China.
| | - Shu Li
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China.
| | - Haiqing Chang
- College of Architecture and Environment, Sichuan University, Chengdu, 610207, PR China.
| | - Senlin Shao
- School of Civil Engineering, Wuhan University, Wuhan, 430072, PR China.
| | - Tinglin Huang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China.
| | - Guibai Li
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin, 150090, PR China.
| | - Heng Liang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin, 150090, PR China.
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13
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Ibn Abdul Hamid K, Sanciolo P, Gray S, Duke M, Muthukumaran S. Comparison of the effects of ozone, biological activated carbon (BAC) filtration and combined ozone-BAC pre-treatments on the microfiltration of secondary effluent. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.01.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Im D, Nakada N, Fukuma Y, Tanaka H. Effects of the inclusion of biological activated carbon on membrane fouling in combined process of ozonation, coagulation and ceramic membrane filtration for water reclamation. CHEMOSPHERE 2019; 220:20-27. [PMID: 30579170 DOI: 10.1016/j.chemosphere.2018.12.071] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 11/09/2018] [Accepted: 12/09/2018] [Indexed: 06/09/2023]
Abstract
We investigated the effects of the inclusion of biological activated carbon (BAC) on membrane fouling in combined process of ozonation, coagulation and ceramic membrane filtration (O3 + PACl + CMF) for treating secondary effluent. Inclusion of BAC between ozonation and coagulation reduced membrane permeability. The normalized flux decreased to 90% of the initial value after 305 h of operation in O3 + PACl + CMF, while it decreased to 20% in combined process of ozonation, BAC, coagulation and ceramic membrane filtration. BAC not only decreased residual ozone that is helpful to mitigate ceramic membrane fouling, but also released microorganisms. In addition, BAC doubled the integrated fluorescence intensity of soluble microbial products (SMP), which cause irreversible fouling. The SMP produced and accumulated by microorganisms on the BAC bed likely flowed into the BAC effluent with the microorganisms. The proportion of SMP in the extracted foulant increased from 25% without BAC to 31% with BAC. Moreover, the inclusion of BAC nearly doubled the concentration of protein in the extracted foulant to 13 g/m2 and quadrupled that of carbohydrate to 6 g/m2. BAC was effective in improving the quality of ceramic membrane permeates and reducing health risk associated with formaldehyde and N-nitrosodimethylamine. However, the release of SMP from BAC accelerated membrane fouling in subsequent ceramic membrane filtration.
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Affiliation(s)
- Dongbum Im
- Research Center for Environmental Quality Management, Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, 520-0811, Japan
| | - Norihide Nakada
- Research Center for Environmental Quality Management, Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, 520-0811, Japan.
| | - Yasuyuki Fukuma
- Research Center for Environmental Quality Management, Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, 520-0811, Japan
| | - Hiroaki Tanaka
- Research Center for Environmental Quality Management, Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, 520-0811, Japan
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15
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Yu W, Graham N, Liu T. Prevention of UF membrane fouling in drinking water treatment by addition of H 2O 2 during membrane backwashing. WATER RESEARCH 2019; 149:394-405. [PMID: 30471535 DOI: 10.1016/j.watres.2018.11.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/29/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023]
Abstract
Although conventional coagulation pre-treatment can mitigate the fouling of ultrafiltration (UF) membrane when treating raw waters, it is insufficient to restrict the development of irreversible fouling and reversible fouling to a low level. In this paper we demonstrate that the intermittent addition of H2O2 into the membrane tank during backwash events (after coagulation pre-treatment) successfully prevented the development of any significant membrane fouling. Laboratory-scale tests were undertaken using two membrane systems operated in parallel over 60 days, one serving as a reference coagulation-ultrafiltration (CUF) process, and the other receiving the H2O2 (CUF-H2O2), with a decreasing dose in three successive phases: 10, 5 and 2 mg/L. The results showed that the addition of H2O2 (via a separate dosing tube) during a 1 min backwash process (at 30 min intervals) reduced the growth of bacteria in the membrane tank, and the associated concentrations of soluble microbial products (SMP, including protein and polysaccharide). This resulted in a much reduced cake layer, which contained significantly less high MW organic matter (>50%), such as EPS, thereby improving the interaction between particles in the cake layer and/or particles and the membrane surface. There was also less organic matter, of all MW fractions, adsorbed in the membrane pores of the CUF-H2O2 system. The addition of H2O2 in the membrane tank appeared to alter the nature of the organic matter with a conversion of hydrophobic to hydrophilic fractions, which induced less organics adsorption within the hydrophobic PVDF membrane pores, and a reduced bonding ability for particles. There was no physico-chemical evidence of any deterioration of the membrane from exposure to H2O2, which indicates the feasibility of applying this novel method of fouling control for full-scale UF based water treatment processes.
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Affiliation(s)
- Wenzheng Yu
- Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK; Key Laboratory of Drinking Water Science and Technology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Nigel Graham
- Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK.
| | - Ting Liu
- Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK.
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16
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Sun H, Liu H, Wang S, Cheng F, Liu Y. Ceramic membrane fouling by dissolved organic matter generated during on-line chemical cleaning with ozone in MBR. WATER RESEARCH 2018; 146:328-336. [PMID: 30316168 DOI: 10.1016/j.watres.2018.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 08/13/2018] [Accepted: 09/01/2018] [Indexed: 06/08/2023]
Abstract
Ceramic membrane bioreactor (MBR) has attracted increasing interest due to its high flux, long membrane life-span and excellent resistance to hash operation conditions. Although ozone has been used for chemical cleaning of ceramic membranes, it is still unclear about the role of dissolved organic matter (DOM) generated during on-line chemical cleaning with ozone in the development of membrane fouling in ceramic MBR. This study clearly revealed that the released DOM could considerably induce irreversible membrane fouling, and humic acid like-substances (HAL) with molecular weight (MW) of about 500 Da were mainly responsible for the observed membrane fouling. A strong positive relationship existed between the membrane fouling rate of supernatant and the rejection level of HAL, evidenced by a high correlation coefficient (R2) of 0.99. Meanwhile, the results also showed that biopolymers with MW greater than 10 kDa were easily rejected by the ceramic membranes used, leading to the development of membrane fouling. However, the high ozone concentration helped to reduce the generation of biopolymers. The organic fractions with MW less than 500 Da in the DOM (e.g. building blocks, low-MW acid and low-MW neutrals) could pass through the ceramic membranes used, i.e. their contributions to the observed membrane fouling could be considered insignificant. Consequently, it appeared from this study that membrane fouling associated with the DOM generated by ozone during on-line chemical cleaning should not be ignored in the design and operation of ceramic MBR towards long-term process sustainability.
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Affiliation(s)
- Huifang Sun
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore
| | - Hang Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore
| | - Siyu Wang
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore
| | - Fangqin Cheng
- Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan, 030006, China
| | - Yu Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
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17
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Sun S, Yao H, Fu W, Hua L, Zhang G, Zhang W. Reactive Photo-Fenton ceramic membranes: Synthesis, characterization and antifouling performance. WATER RESEARCH 2018; 144:690-698. [PMID: 30096694 DOI: 10.1016/j.watres.2018.08.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 07/22/2018] [Accepted: 08/03/2018] [Indexed: 06/08/2023]
Abstract
To develop reactive and antifouling membrane filtration systems, a photo-Fenton ceramic membrane was prepared by coating goethite (α-FeOOH) catalysts on a zirconia/titania alumina membrane via a cross-linking method. Scanning electron microscopy (SEM), X-ray diffraction spectroscopy (XRD) and Fourier transform infrared spectroscopy (FTIR) were used to characterize α-FeOOH catalysts and the surface coating quality. The cross linker yielded stable covalent binding between catalyst and membrane under room temperature and produced a homogeneous and smooth coating of catalyst on ceramic membranes. Photo-Fenton reactions were initiated with addition of H2O2 under UV irradiation to improve the foulant degradation on membrane surface while filtration. Membrane fouling was simulated by bovine serum albumin (BSA) and humic acid (HA). Our results show that the photo-Fenton reactions on the coated membranes slowed down the fouling kinetics and even reversed the fouling, leading to a stable transmembrane pressure (TMP) over time of filtration, as opposed to a monotonous increase of TMP due to surface fouling. The batch experiments verified that the photo-Fenton reactions achieved the degradation rates of 76% and 86% for HA and BSA respectively within 60 min, with the mineralization rates of over 80% as indicated by the total organic carbon measurement. This study embarks on a novel antifouling membrane filtration process via incorporation of photo-Fenton reactions. The findings are also important for diverse applications of surface fouling mitigation and rationale design of fouling resistant surfaces or materials through photo-Fenton or other catalytic reactions.
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Affiliation(s)
- Shaobin Sun
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, PR China; John A. Reif, Jr. Department of Civil and Environmental Engineering, New Jersey Institute of Technology, 07102, USA
| | - Hong Yao
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, PR China.
| | - Wanyi Fu
- John A. Reif, Jr. Department of Civil and Environmental Engineering, New Jersey Institute of Technology, 07102, USA
| | - Likun Hua
- John A. Reif, Jr. Department of Civil and Environmental Engineering, New Jersey Institute of Technology, 07102, USA
| | - Guangshan Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Wen Zhang
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, PR China; John A. Reif, Jr. Department of Civil and Environmental Engineering, New Jersey Institute of Technology, 07102, USA; School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China.
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18
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Zhang X, Fan L, Roddick FA. Impact of the Interaction between Aquatic Humic Substances and Algal Organic Matter on the Fouling of a Ceramic Microfiltration Membrane. MEMBRANES 2018; 8:membranes8010007. [PMID: 29389873 PMCID: PMC5872189 DOI: 10.3390/membranes8010007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 01/25/2018] [Accepted: 01/29/2018] [Indexed: 11/16/2022]
Abstract
The influence of the interaction between aquatic humic substances and the algal organic matter (AOM) derived from Microcystis aeruginosa on the fouling of a ceramic microfiltration (MF) membrane was studied. AOM alone resulted in a significantly greater flux decline compared with Suwannee River humic acid (HA), and fulvic acid (FA). The mixture of AOM with HA and FA exhibited a similar flux pattern as the AOM alone in the single-cycle filtration tests, indicating the flux decline may be predominantly controlled by the AOM in the early filtration cycles. The mixtures resulted in a marked increase in irreversible fouling resistance compared with all individual feed solutions. An increase in zeta potential was observed for the mixtures (becoming more negatively charged), which was in accordance with the increased reversible fouling resistance resulting from enhanced electrostatic repulsion between the organic compounds and the negatively-charged ceramic membrane. Dynamic light scattering (DLS) and size exclusion chromatography analyses showed an apparent increase in molecular size for the AOM-humics mixtures, and some UV-absorbing molecules in the humics appeared to participate in the formation of larger aggregates with the AOM, which led to greater extent of pore plugging and hence resulted in higher irreversible fouling resistance.
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Affiliation(s)
- Xiaolei Zhang
- Chemical and Environmental Engineering Department, School of Engineering, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia.
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 702-701, Korea.
| | - Linhua Fan
- Chemical and Environmental Engineering Department, School of Engineering, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia.
| | - Felicity A Roddick
- Chemical and Environmental Engineering Department, School of Engineering, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia.
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