1
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Wang J, Cahyadi A, Wu B, Pee W, Fane AG, Chew JW. The roles of particles in enhancing membrane filtration: A review. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117570] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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2
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Wang S, Ma C, Pang C, Hu Z, Wang W. Membrane fouling and performance of anaerobic ceramic membrane bioreactor treating phenol- and quinoline-containing wastewater: granular activated carbon vs polyaluminum chloride. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:34167-34176. [PMID: 30484054 DOI: 10.1007/s11356-018-3802-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 11/19/2018] [Indexed: 06/09/2023]
Abstract
Although anaerobic membrane bioreactor (AnMBR) has been proposed for the treatment of phenolic wastewater, the membrane fouling is still a major obstacle. The effects of dosing of granular activated carbon (GAC) and polyaluminum chloride (PACl) on the treatment performance and membrane fouling of anaerobic ceramic membrane bioreactor were investigated for treating phenol- and quinoline-containing wastewater. The results suggested that the one-off dosing of GAC resulted in a decrease of protein/carbohydrate ratio, which might account for the aggravation of membrane fouling alongside with the decreased flocs size. Nevertheless, the substrate uptake rates (SUR) of phenol and quinoline, and the specific methanogenic activity of sludge at the GAC dosing stage of experimental reactor (R1) were 8.79 ± 0.63 mg phenol g-1 MLVSS d-1, 7.01 ± 0.09 mg quinoline g-1 MLVSS d-1 and 0.27 ± 0.01 g CODCH4 g-1 MLVSS d-1, which were 1.69, 3.59 and 1.93 times higher than that of the control reactor (R2). The dosing of PACl reduced the membrane fouling rate by changing the floc structure of sludge, as well as the component of SMP and EPS. However, the substrate uptake rate of quinoline was declined. This work provides a comprehensive evaluation on the effect of GAC and PACl dosing on membrane fouling and performance of anaerobic ceramic membrane bioreactor treating phenol-and quinoline-containing wastewater.
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Affiliation(s)
- Shun Wang
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Cong Ma
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin, 300387, China
| | - Chao Pang
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Zhenhu Hu
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Wei Wang
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China.
- Key Laboratory of Urban Pollutant Conversion, Chinese Academy of Sciences, University of Science and Technology of China, Hefei, 230009, China.
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Gonçalves J, Baldovi AA, Chyoshi B, Zanata L, Salcedo AM, Subtil EL, Coelho LHG. EFFECT OF ALUMINUM SULFATE AND CATIONIC POLYMER ADDITION IN THE MIXED LIQUOR OF A SUBMERGED MEMBRANE BIOREACTOR (SMBR): SLUDGE CHARACTERISTICS AND ORTHOPHOSPHATE REMOVAL IN BATCH EXPERIMENTS. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2019. [DOI: 10.1590/0104-6632.20190362s20180128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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4
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Guo YF, Sun PC, Wei JF. New insight into the fouling behavior of hydrophobic and hydrophilic polypropylene membranes in integrated membrane bioreactors. ENVIRONMENTAL TECHNOLOGY 2018; 39:3159-3168. [PMID: 28868976 DOI: 10.1080/09593330.2017.1375023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Accepted: 08/26/2017] [Indexed: 06/07/2023]
Abstract
To investigate the effect of hydrophobic and hydrophilic polypropylene hollow fiber membranes (PPHFMs) applied in membrane bioreactors (MBR), the fouling behaviors of membrane surfaces and pores have been tested. The structural and morphological features on the membrane surface were characterized using attenuated total reflection-Fourier transform infrared spectroscopy, field emission scanning electron microscopy, atomic force microscope, energy dispersive X-ray spectroscopy and laser granularity distribution analysis. The results showed that significantly more polysaccharide, protein and inorganic ingredients were accumulated in the original membrane compared to the hydrophilic membrane. Furthermore, it was found that the pore size influenced the particle distribution and accumulation, such that smaller pore size membranes tended to contain fewer pollutants and a narrow size distribution. Under a constant flux of 11.5 L/m2 h, the transmembrane pressure (TMP) varied narrowly between 38 and 53 KPa. Alongside this, a relatively hydrophilic membrane (PP-g-AA) showed the characteristics of lower TMP in comparison to hydrophobic membranes (PP). Indeed, the flux recovery was 30% higher than those of the original PPHFM. This investigation broadens our understanding of membrane modifying and fouling behavior in integrated MBRs.
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Affiliation(s)
- Yan-Fen Guo
- a School of Material Science and Engineering , Tianjin Polytechnic University , Tianjin , People's Republic of China
| | - Pi-Chao Sun
- b School of Environmental and Chemical Engineering , Tianjin Polytechnic University , Tianjin , People's Republic of China
| | - Jun-Fu Wei
- b School of Environmental and Chemical Engineering , Tianjin Polytechnic University , Tianjin , People's Republic of China
- c State Key Laboratory of Separation Membranes and Membrane Processes , Tianjin Polytechnic University , Tianjin , People's Republic of China
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5
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Gkotsis P, Tsilogeorgis J, Zouboulis A. Hydraulic performance and fouling characteristics of a membrane sequencing batch reactor (MSBR) for landfill leachate treatment under various operating conditions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:12274-12283. [PMID: 28905297 DOI: 10.1007/s11356-017-0142-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 09/07/2017] [Indexed: 06/07/2023]
Abstract
This study investigates the hydraulic performance and the fouling characteristics of a bench-scale membrane sequencing batch reactor (MSBR), treating mature landfill leachate under various time-based operating conditions. The MSBR system operated initially under a high-flux condition (Period 1) which resulted in a rapid trans-membrane pressure (TMP) rise due to intense fouling. Following the characterization of Period 1 as super-critical, the system was subsequently operated under a near-critical condition (Period 2). The overall filtration resistance analysis showed that cake layer formation was the dominant fouling mechanism during Period 1, contributing to 85.5% of the total resistance. However, regarding the MSBR operation during Period 2, adsorption was found to also be a dominant fouling mechanism (Days 1 to 47), contributing to 29.1% of the total resistance. Additionally, the irregular total resistance variation, which was observed during the subsequent operation (Days 48 to 75), and the respective filtration resistance analysis suggested also the formation of an initial sludge cake layer on the membrane surface, contributing to the 47.7% of the total resistance.
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Affiliation(s)
- Petros Gkotsis
- School of Chemistry, Chemical and Environmental Technology Section, Aristotle University of Thessaloniki, Box 116, 54124, Thessaloniki, Greece
| | - Jason Tsilogeorgis
- School of Chemistry, Chemical and Environmental Technology Section, Aristotle University of Thessaloniki, Box 116, 54124, Thessaloniki, Greece
| | - Anastasios Zouboulis
- School of Chemistry, Chemical and Environmental Technology Section, Aristotle University of Thessaloniki, Box 116, 54124, Thessaloniki, Greece.
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6
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Gkotsis PK, Batsari EL, Peleka EN, Tolkou AK, Zouboulis AI. Fouling control in a lab-scale MBR system: Comparison of several commercially applied coagulants. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 203:838-846. [PMID: 26968726 DOI: 10.1016/j.jenvman.2016.03.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 02/25/2016] [Accepted: 03/01/2016] [Indexed: 06/05/2023]
Abstract
The Membrane bioreactors (MBRs) integrate the biological degradation of pollutants with membrane filtration-separation during wastewater treatment. Membrane fouling, which is considered as the main process drawback, stems from the interaction between the membrane material and the (organic or inorganic) foulants, leading to membrane's efficiency deterioration. It is widely recognized that the mixed liquor colloidal and Soluble Microbial Products (SMP) are in principal responsible for this undesirable situation. As a result, the appropriate pretreatment of wastewater feed is often considered as necessary procedure and the coagulation/flocculation (C/F) process is regarded as a relevant viable option for wastewater treatment by MBRs in order to improve the effective removal of suspended solids (SS), of colloidal particles, of natural organic matter (NOM), as well as of other soluble materials. The objective of this study is the application of coagulation/flocculation for fouling control of MBR systems by using several commercially available chemical coagulant/flocculant agents. For this purpose, an appropriate lab-scale continuous-flow, fully automatic MBR system has been assembled and various (inorganic) coagulants (i.e. FeCl3∙6H2O, Fe2(SO4)3·5H2O, FeClSO4, PFS0.3, PAC A9-M, PAC-A16, Al2(SO4)3·18H2O, FO4350SSH, NaAlO2) have been examined. Filterability tests and SMP concentration measurements were also conducted in order to investigate the reversible, as well as the irreversible fouling, respectively. Based upon the obtained results and after selecting the most efficient coagulants (FeCl3·6H2O, Fe2(SO4)3·5H2O, FeClSO4, PAC-A9, PAC-A16), an attempt was subsequently performed to correlate the major fouling indices (i.e. TMP, TTF, SMP concentration) in order to improve the overall process operability by this fouling control method.
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Affiliation(s)
- P K Gkotsis
- Chemical Technology and Industrial Chemistry Section, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - E L Batsari
- Chemical Technology and Industrial Chemistry Section, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - E N Peleka
- Chemical Technology and Industrial Chemistry Section, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - A K Tolkou
- Chemical Technology and Industrial Chemistry Section, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - A I Zouboulis
- Chemical Technology and Industrial Chemistry Section, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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7
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Zhang Q, Singh S, Stuckey DC. Fouling reduction using adsorbents/flocculants in a submerged anaerobic membrane bioreactor. BIORESOURCE TECHNOLOGY 2017; 239:226-235. [PMID: 28521233 DOI: 10.1016/j.biortech.2017.05.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Revised: 04/29/2017] [Accepted: 05/03/2017] [Indexed: 06/07/2023]
Abstract
Using adsorbents/flocculants in anaerobic membrane bioreactors (AnMBRs) to reduce membrane fouling is comparatively rare. This study evaluated 8 additives: 3 powdered activated carbons, 2 granular activated carbons, 1 cationic polymer, and 2 metal salts to identify the best additive and dose to minimise membrane fouling. Small cross flow filtration tests showed 400mg/L PAC SAE2, or 150mg/L FeCl3, reduced the transmembrane pressure (TMP) rise from 0.94 to 0.06kPa/h, indicating excellent fouling reduction. The best filtration performance correlated with a significant reduction in supernatant supracolloidal particles, colloids and SMPs. FESEM-EDX showed that PAC SAE 2 and FeCl3 reduced the thickness of the fouling layer dramatically, while FeCl3 increased sludge floc size and particle size of the colloids, while decreasing the negative charge of colloids, and SMP size. Furthermore, Fe was not found in the supernatant or effluent, but precipitated with the solids, which is beneficial for its long-term use.
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Affiliation(s)
- Qiaoyun Zhang
- Advanced Environmental Biotechnology Center, Nanyang Environment & Water Research Institute, Nanyang Technological University, 637141 Singapore, Singapore
| | - Suniti Singh
- Advanced Environmental Biotechnology Center, Nanyang Environment & Water Research Institute, Nanyang Technological University, 637141 Singapore, Singapore
| | - David C Stuckey
- Advanced Environmental Biotechnology Center, Nanyang Environment & Water Research Institute, Nanyang Technological University, 637141 Singapore, Singapore; Department of Chemical Engineering, Imperial College London, SW7 2AZ, UK.
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8
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Sima XF, Wang YY, Shen XC, Jing XR, Tian LJ, Yu HQ, Jiang H. Robust biochar-assisted alleviation of membrane fouling in MBRs by indirect mechanism. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.04.046] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Demirkol GT, Dizge N, Acar TO, Salmanli OM, Tufekci N. Influence of nanoparticles on filterability of fruit-juice industry wastewater using submerged membrane bioreactor. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:705-711. [PMID: 28759452 DOI: 10.2166/wst.2017.255] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this study, polyethersulfone (PES) ultrafiltration membrane surface was modified with nano-sized zinc oxide (nZnO) and silver (nAg) to improve the membrane filterability of the mixed liquor and used to treat fruit-juice industry wastewater in a submerged membrane bioreactor (MBR). The nAg was synthesized using three different methods. In the first method, named as nAg-M1, PES membrane was placed on the membrane module and nAg solution was passed through the membrane for 24 h at 25 ± 1 °C. In the second method, named as nAg-M2, PES membrane was placed in a glass container and it was shaken for 24 h at 150 rpm at 25 ± 1 °C. In the third method, named as nAg-M3, Ag nanoparticles were loaded onto PES membrane in L-ascorbic acid solution (0.1 mol/L) at pH 2 for 24 h at 150 rpm at 25 ± 1 °C. For the preparation of nZnO coated membrane, nZnO nanoparticles solution was passed through the membrane for 24 h at 25 ± 1 °C. Anti-fouling performance of pristine and coated membranes was examined using the submerged MBR. The results showed that nZnO and nAg-M3 membranes showed lower flux decline compared with pristine membrane. Moreover, pristine and coated PES membranes were characterized using a permeation test, contact angle goniometer, and scanning electron microscopy.
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Affiliation(s)
- Guler Turkoglu Demirkol
- Department of Environmental Engineering, Istanbul University, Istanbul 34320, Turkey E-mail:
| | - Nadir Dizge
- Department of Environmental Engineering, Mersin University, Mersin 33343, Turkey
| | - Turkan Ormanci Acar
- Department of Environmental Engineering, Istanbul University, Istanbul 34320, Turkey E-mail:
| | - Oyku Mutlu Salmanli
- Department of Environmental Engineering, Istanbul Technical University, Istanbul 34469, Turkey
| | - Nese Tufekci
- Department of Environmental Engineering, Istanbul University, Istanbul 34320, Turkey E-mail:
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10
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Impact of Coagulant and Flocculant Addition to an Anaerobic Dynamic Membrane Bioreactor (AnDMBR) Treating Waste-Activated Sludge. MEMBRANES 2017; 7:membranes7020018. [PMID: 28333092 PMCID: PMC5489852 DOI: 10.3390/membranes7020018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 03/12/2017] [Accepted: 03/15/2017] [Indexed: 11/17/2022]
Abstract
In this work, we investigated the effects of flocculation aid (FA) addition to an anaerobic dynamic membrane bioreactor (AnDMBR) (7 L, 35 °C) treating waste-activated sludge (WAS). The experiment consisted of three distinct periods. In period 1 (day 1–86), the reactor was operated as a conventional anaerobic digester with a solids retention time (SRT) and hydraulic retention time (HRT) of 24 days. In period 2 (day 86–303), the HRT was lowered to 18 days with the application of a dynamic membrane while the SRT was kept the same. In period 3 (day 303–386), a cationic FA in combination with FeCl3 was added. The additions led to a lower viscosity, which was expected to lead to an increased digestion performance. However, the FAs caused irreversible binding of the substrate, lowering the volatile solids destruction from 32% in period 2 to 24% in period 3. An accumulation of small particulates was observed in the sludge, lowering the average particle size by 50%. These particulates likely caused pore blocking in the cake layer, doubling the trans-membrane pressure. The methanogenic consortia were unaffected. Dosing coagulants and flocculants into an AnDMBR treating sludge leads to a decreased cake layer permeability and decreased sludge degradation.
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11
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Villamil JA, Monsalvo VM, Lopez J, Mohedano AF, Rodriguez JJ. Fouling control in membrane bioreactors with sewage-sludge based adsorbents. WATER RESEARCH 2016; 105:65-75. [PMID: 27596703 DOI: 10.1016/j.watres.2016.08.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 08/18/2016] [Accepted: 08/28/2016] [Indexed: 06/06/2023]
Abstract
The potential application of powdered activated carbon (PAC) to mitigate membrane fouling has been tested in membrane bioreactors (MBRs) fed with cosmetic wastewater. Inexpensive powder activated carbon was prepared from sewage sludge biosolids (B-PAC) by pyrolysis (750 °C; 0.5 h) and air-activation (400 °C; 2 h). Adsorption capacities of 143 and 570 mg g-1 were reached for carbohydrates and proteins, respectively, quite similar to those of a commercial activated carbon (C-PAC). To check the effect of PAC addition on membrane fouling, three MBRs were simultaneously operated without (control-MBR) and with PAC (B-MBR and C-MBR) for 150 days in continuous mode at 8 L m-2 h-1 flux. Similar COD removal efficiencies were achieved in these three MBR systems. After 100 days of operation, the effect of the PACs on the sludge filterability was studied in the MBRs for 10 days. B-MBR showed stable transmembrane pressure (TMP) after 9 days of operation, unlike of control-MBR and C-MBR, where the TMP increased after the 2nd and 5th days, respectively. Therefore, operational cost saving can be achieved in the membrane cleaning due to decrease of fouling rate. Operating at stable state condition the addition of PAC gave rise to an increase of the critical flux of 25%. In an extra shear test, carried out at the end of the continuous experiment, a clear reduction in mean size of the flocs from 45 to 28 μm was observed in control-MBR. However, the extra shear led to a slight reduction of the mean size of flocs (less than 5%) in MBRs with PAC, with average sizes of 62 and 71 μm in C-MBR and B-MBR, respectively. The molecular weight fractionation of the MBR demonstrated a higher selectivity of B-PAC toward the adsorption of proteins smaller than 1 μm which prevents the irreversible fouling of the membranes. The membranes lifetime was increased because the B-PAC extended the filtration for a longer period than C-PAC, probably due to its easier in-situ regeneration.
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Affiliation(s)
- J A Villamil
- Seccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, C/ Francisco Tomas y Valiente 7, 28924, Madrid, Spain.
| | - V M Monsalvo
- Seccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, C/ Francisco Tomas y Valiente 7, 28924, Madrid, Spain.
| | - J Lopez
- Seccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, C/ Francisco Tomas y Valiente 7, 28924, Madrid, Spain.
| | - A F Mohedano
- Seccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, C/ Francisco Tomas y Valiente 7, 28924, Madrid, Spain.
| | - J J Rodriguez
- Seccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, C/ Francisco Tomas y Valiente 7, 28924, Madrid, Spain.
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Alkmim AR, da Costa PR, Moser PB, França Neta LS, Santiago VMJ, Cerqueira AC, Amaral MCS. Long-term evaluation of different strategies of cationic polyelectrolyte dosage to control fouling in a membrane bioreactor treating refinery effluent. ENVIRONMENTAL TECHNOLOGY 2015; 37:1026-1035. [PMID: 26508453 DOI: 10.1080/09593330.2015.1096964] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this article, the long-term use of cationic polyelectrolyte to improve the sludge filterability and to control membrane fouling in bioreactor membrane while treating refinery effluents have been evaluated in pilot scale. Corrective and preventive cationic polyelectrolyte dosages have been added to the membrane bioreactor (MBR) to evaluate the membrane fouling mitigation in both strategies. The results have confirmed that the use of the Membrane performance enhancer (MPE) increased the sludge filterability and reduced the membrane fouling. During the monitoring period, stress events occurred due to the increase in oil and grease and phenol concentrations in the MBR feeds. The preventive use of cationic polyelectrolyte allowed for a more effective and stable sludge filterability, with lower cationic polyelectrolyte consumption and without decreasing MBR's overall pollutant removal performance.
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Affiliation(s)
- Aline R Alkmim
- a Department of Sanitary and Environmental Engineering , Federal University of Minas Gerais , Belo Horizonte , MG , Brazil
| | - Paula R da Costa
- a Department of Sanitary and Environmental Engineering , Federal University of Minas Gerais , Belo Horizonte , MG , Brazil
| | - Priscila B Moser
- b Research and Development Center of PETROBRAS S.A/CENPES , Rio de Janeiro , RJ , Brazil
| | - Luzia S França Neta
- c Chemistry Department , Federal Center of Technological Education of Minas Gerais , Belo Horizonte , MG , Brazil
| | - Vânia M J Santiago
- b Research and Development Center of PETROBRAS S.A/CENPES , Rio de Janeiro , RJ , Brazil
| | - Ana C Cerqueira
- b Research and Development Center of PETROBRAS S.A/CENPES , Rio de Janeiro , RJ , Brazil
| | - Míriam C S Amaral
- a Department of Sanitary and Environmental Engineering , Federal University of Minas Gerais , Belo Horizonte , MG , Brazil
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Hawari AH, Du F, Baune M, Thöming J. A fouling suppression system in submerged membrane bioreactors using dielectrophoretic forces. J Environ Sci (China) 2015; 29:139-145. [PMID: 25766022 DOI: 10.1016/j.jes.2014.07.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 06/04/2014] [Accepted: 07/08/2014] [Indexed: 06/04/2023]
Abstract
A novel method was developed to suppress membrane fouling in submerged membrane bioreactors. The method is based on the dielectrophoretic (DEP) motion of particles in an inhomogeneous electrical field. Using a real sample of biomass as feed, the fouling-suppression performance using DEP with different electrical field intensities (60-160 V) and different frequencies (50-1000 Hz) was investigated. The fouling-suppression performance was found to relate closely with the intensity and frequency of the electrical field. A stronger electrical field was found to better recover the filtrate flux. This is because of a stronger DEP force acting on the biomass particles close to the membrane's surface. Above an intensity and frequency value of 130 V and 1 kHz, respectively the permeate flux was reduced due to an electrothermal effect.
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Affiliation(s)
- Alaa H Hawari
- Department of Civil and Architectural Engineering, College of Engineering, Qatar University, 2713 Doha, Qatar.
| | - Fei Du
- Center of Environmental Research and Sustainable Technology, University of Bremen, Leobener Str., D 28359 Bremen, Germany
| | - Michael Baune
- Center of Environmental Research and Sustainable Technology, University of Bremen, Leobener Str., D 28359 Bremen, Germany
| | - Jorg Thöming
- Center of Environmental Research and Sustainable Technology, University of Bremen, Leobener Str., D 28359 Bremen, Germany
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14
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De Temmerman L, Maere T, Temmink H, Zwijnenburg A, Nopens I. Salt stress in a membrane bioreactor: dynamics of sludge properties, membrane fouling and remediation through powdered activated carbon dosing. WATER RESEARCH 2014; 63:112-124. [PMID: 24999116 DOI: 10.1016/j.watres.2014.06.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 06/12/2014] [Accepted: 06/15/2014] [Indexed: 06/03/2023]
Abstract
Membrane bioreactors are a well-established technology for wastewater treatment. However, their efficiency is adversely impacted by membrane fouling, primarily inciting very conservative operations of installations that makes them less appealing from an economic perspective. This fouling propensity of the activated sludge is closely related to system disturbances. Therefore, improved insight into the impact of fouling is crucial towards increased membrane performance. In this work, the disturbance of a salt shock was investigated with respect to sludge composition and filterability in two parallel lab-scale membrane bioreactors. Several key sludge parameters (soluble microbial products, sludge-bound extracellular polymeric substances, supramicron particle size distributions (PSD), submicron particle concentrations) were intensively monitored prior to, during, and after a disturbance to investigate its impact as well as the potential governing mechanism. Upon salt addition, the supramicron PSD immediately shifted to smaller floc sizes, and the total fouling rate increased. Following a certain delay, an increase in submicron particles, supernatant proteins, and polysaccharides was observed as well as an increase in the irreversible membrane fouling rate. Recovery from the disturbance was evidenced with a simultaneous decrease in the above mentioned quantities. A similar experiment introducing powdered activated carbon (PAC) addition used for remediation resulted in either no or less significant changes in the above mentioned quantities, signifying its potential as a mitigation strategy.
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Affiliation(s)
- L De Temmerman
- Wetsus Centre of Excellence for Sustainable Water Technology, P.O. Box 1113, 8900 CC Leeuwarden, The Netherlands; BIOMATH, Department of Mathematical Modelling, Statistics and Bioinformatics, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| | - T Maere
- BIOMATH, Department of Mathematical Modelling, Statistics and Bioinformatics, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - H Temmink
- Wetsus Centre of Excellence for Sustainable Water Technology, P.O. Box 1113, 8900 CC Leeuwarden, The Netherlands; Sub-department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - A Zwijnenburg
- Wetsus Centre of Excellence for Sustainable Water Technology, P.O. Box 1113, 8900 CC Leeuwarden, The Netherlands
| | - I Nopens
- BIOMATH, Department of Mathematical Modelling, Statistics and Bioinformatics, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
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15
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Wang H, Zhang L, Li Y, Hu C. Influence of Filtration Aids on Continuous Filtration in Membrane Bioreactors. Ind Eng Chem Res 2014. [DOI: 10.1021/ie500319f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hongyu Wang
- School
of Civil Engineering and Architectural, Zhejiang University of Technology, Hangzhou 310014, China
| | - Longyuan Zhang
- School
of Civil Engineering and Architectural, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yaozhong Li
- Kemira Chemicals Company, Ltd. Shanghai 200210, China
| | - Chao Hu
- School
of Civil Engineering and Architectural, Zhejiang University of Technology, Hangzhou 310014, China
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Zuriaga-Agustí E, Bes-Piá A, Mendoza-Roca J, Alonso-Molina J. Influence of extraction methods on proteins and carbohydrates analysis from MBR activated sludge flocs in view of improving EPS determination. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2013.03.048] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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