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Journal articles on the topic 'Cross-flow ultrafiltration process'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ahmad, A. L., M. F. Chong, and S. Bhatia. "Ultrafiltration modeling of multiple solutes system for continuous cross-flow process." Chemical Engineering Science 61, no. 15 (2006): 5057–69. http://dx.doi.org/10.1016/j.ces.2006.03.017.

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2

Bielska, Małgorzata, and Krystyna Prochaska. "Dyes separation by means of cross-flow ultrafiltration of micellar solutions." Dyes and Pigments 74, no. 2 (2007): 410–15. http://dx.doi.org/10.1016/j.dyepig.2006.03.001.

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3

Ilias, Shamsuddin, Keith A. Schimmel, and Gervas E. J. M. Assey. "Effect of Viscosity on Membrane Fluxes in Cross-Flow Ultrafiltration." Separation Science and Technology 30, no. 7-9 (1995): 1669–87. http://dx.doi.org/10.1080/01496399508010369.

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4

Guigui, C., V. Bonnelye, L. Durand-Bourlier, J. C. Rouch, and P. Aptel. "Combination of coagulation and ultrafiltration for drinking water production: impact of process configuration and module design." Water Supply 1, no. 5-6 (2001): 107–18. http://dx.doi.org/10.2166/ws.2001.0105.

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The in-line coagulation/ultrafiltration (UF) combined process has been studied in order to improve membrane performance for the treatment of surface water with high organic content. Ultrafiltration experiments were performed using cellulose derivative hollow-fibre membranes with ferric chloride as coagulant. The efficacy of adding coagulant just before the membrane module depends on the filtration mode, the process configuration and the module design. In dead-end mode, permeation flux of 70 l/hm2 can be maintained, but high backwash frequency (low recovery) is necessary to prevent plugging. Cr

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5

Zhu, Zhenzhou, Houcine Mhemdi, Wenxiang Zhang, et al. "Rotating Disk-Assisted Cross-Flow Ultrafiltration of Sugar Beet Juice." Food and Bioprocess Technology 9, no. 3 (2015): 493–500. http://dx.doi.org/10.1007/s11947-015-1644-3.

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6

Fan, X.-j., V. Urbain, Y. Qian, and J. Manem. "Ultrafiltration of activated sludge with ceramic membranes in a cross-flow membrane bioreactor process." Water Science and Technology 41, no. 10-11 (2000): 243–50. http://dx.doi.org/10.2166/wst.2000.0653.

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A cross-flow membrane bioreactor (MBR) for raw municipal wastewater treatment, consisting of a suspended growth bioreactor and a ceramic membrane ultrafiltration unit, was run over a period of more than 300 days in a wastewater treatment plant (WWTP). Sludge Retention Times (SRT) of 20, 10 and 5 days, respectively, and Hydraulic Retention Times (HRT) of 15 and 7.5 hours were tested. Membrane fouling was found to be a function of SRT and permeate flux. Under an SRT of 20 days and flux of 71 l/m2\ · h at 30°C, the MBR was successfully run over 70 days without the need for chemical cleaning. Howe

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7

Rodionov, D. A., S. I. Lazarev, D. N. Protasov, O. A. Abonosimov, and K. K. Polyansky. "Mathematical model of the process of ultrafiltration concentration of secondary milk raw materials in tubular membrane devices with filtering elements of BTU 05/2 type." Proceedings of the Voronezh State University of Engineering Technologies 83, no. 1 (2021): 36–43. http://dx.doi.org/10.20914/2310-1202-2021-1-36-43.

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For the qualitative application of ultrafiltration processes for the concentration and purification of food solutions, both experimental studies and a mathematical description of the processes of the membrane separation process of solutions from the standpoint of the development of computational mathematical models are required. In this work, by analytical solution of equations, that is, by the method of finite differences, mathematical equations are solved. To obtain the system, the flow continuity equations, convective diffusion equations, Navier-Stokes equations and flow equations with boun

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8

Nguyen, Tuan-Anh, Shiro Yoshikawa, and Shinichi Ookawara. "Steady State Permeate Flux Estimation in Cross-Flow Ultrafiltration of Protein Solution." Separation Science and Technology 49, no. 10 (2014): 1469–78. http://dx.doi.org/10.1080/01496395.2014.893533.

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9

Ćwirko, Konrad, Elwira Tomczak, Daniela Szaniawska, and Ryszard Buczkowski. "Pilot Tests and Fouling Identification in the Ultrafiltration of Model Oily and Saline Wastewaters." Ecological Chemistry and Engineering S 26, no. 3 (2019): 493–507. http://dx.doi.org/10.1515/eces-2019-0037.

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Abstract This paper evaluates ceramic membrane performance and fouling mechanisms in the ultrafiltration of model oil-in-water solutions with addition of NaCl. First, the work estimated the effect of main process parameters, i.e. transmembrane pressure, cross-flow velocity and NaCl content in the feed on oil rejection and permeate flux using 23 experimental design. The ultrafiltration experiments were carried out using pilot installation with commercial tubular ceramic 300 kDa membrane. Ultrafiltration data obtained using experimental design technique was used to determine the regression coeff

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10

Klegraf, F., and J. Lahnsteiner. "MARAPUR—a new process combination for the optimization of MBR." Water Science and Technology 58, no. 11 (2008): 2101–7. http://dx.doi.org/10.2166/wst.2008.758.

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The MARAPUR concept is a biological wastewater treatment process based on the MBR functional principle. The ultrafiltration of activated sludge takes place in pressure-driven hollow fiber membranes. The vertical membrane modules are installed compactly in a MEGAMODUL. The permeate extraction is accomplished in the cross-flow, which is supported by rinsing aeration. The main process advantages are high filtration performance, excellent operation reliability provided by wastewater fine sieving and reduced cleaning chemicals demand. Wastewater fine sieving with a mesh size of 0.25 mm is an effect

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11

Hirata, T., and A. Hashimoto. "Experimental assessment of the efficacy of microfiltration and ultrafiltration for Cryptosporidium removal." Water Science and Technology 38, no. 12 (1998): 103–7. http://dx.doi.org/10.2166/wst.1998.0515.

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In order to evaluate the efficacy of microfiltration and ultrafiltration for Cryptosporidium oocyst removal, a bench-scale experiment was carried out using two 0.2m2 molecules, MF (nominal pore size 0.25μm) and UF (nominal cut-off MW 13,000 daltons) in cross-flow mode at an oocyst level of 106/L. Both of the membranes eliminated the oocysts from the influents with removal efficiency estimated to be &gt;7 log10. As for the MF, an additional experiment was conducted at a much higher oocyst level up to 108 oocysts/L in both cross-flow and dead-end modes and which achieved &gt;7 log10 remo

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12

Hargrove, S. C., H. Parthasarathy, and Shamsuddin Ilias. "Flux Enhancement in Cross-Flow Membrane Filtration by Flow Reversal: A Case Study on Ultrafiltration of BSA." Separation Science and Technology 38, no. 12-13 (2003): 3133–44. http://dx.doi.org/10.1081/ss-120022590.

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13

Rose, P. D., B. A. Maart, T. D. Phillips, S. L. Tucker, A. K. Cowan, and R. A. Rowswell. "Cross-Flow Ultrafiltration Used in Algal High Rate Oxidation Pond Treatment of Saline Organic Effluents with the Recovery of Products of Value." Water Science and Technology 25, no. 10 (1992): 319–27. http://dx.doi.org/10.2166/wst.1992.0258.

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An algal high rate oxidation ponding process for treating organic s present in saline effluents has been described. The extreme halophile Dunaliella salina can be made to predominate in the system by manipulating salinity, producing products of value together with a waste treatment function. Application in treating tannery saline organic wastes was examined. Techniques appropriate for the harvesting of micro-algae from this and other algal production systems presents a limiting factor in the development of algal biotechnology. Cross-flow filtration was evaluated as a technique for micro-algal

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14

Wan Daud, Wan Ramli. "Rate‐Based Design of Non‐fouled Cross‐Flow Hollow Fiber Membrane Modules for Ultrafiltration." Separation Science and Technology 39, no. 6 (2005): 1221–38. http://dx.doi.org/10.1081/ss-120030479.

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15

Pradanos, P., J. I. Arribas, and A. Hernandez. "Flux Limiting Factors in Cross-flow Ultrafiltration of Invertase through an Asymmetric Inorganic Membrane." Separation Science and Technology 28, no. 10 (1993): 1899–911. http://dx.doi.org/10.1080/01496399308029249.

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16

Popa, George Alexandru, Daniela Florentina Popa (Enache), Dumitra Daniela Slave (Clej), Ion Din Spiridon, Cristina Monica Mirea, and Adrian Ciocanea. "Ultrafiltration of Aqueous Solutions of Food Dye in the Presence of Surfactants." Revista de Chimie 68, no. 1 (2017): 6–10. http://dx.doi.org/10.37358/rc.17.1.5377.

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The objective of the study is the low-pressure membrane process for treating aqueous solutions containing food dyes and surfactants. The influence of surfactants (SDS � sodium dedecil sulphate, SO � sodium octanoate) in the separation of synthetic food dyes (E104 � quinoline yellow) was analyzed. Polysulfone and polysulfone-polyaniline membranes were used. Dye and surfactant concentrations used were 10% (equivalent to 100g/m3). The pressures used in the ultrafiltration process were 0.1, 0.2 and 0.3 MPa. When dye containing solutions were passed through the membranes, an increase in their flux

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17

Lai, Dat Quoc, Nobuhiro Tagashira, Shoji Hagiwara, Mitsutoshi Nakajima, Toshinori Kimura, and Hiroshi Nabetani. "Influences of Technological Parameters on Cross-Flow Nanofiltration of Cranberry Juice." Membranes 11, no. 5 (2021): 329. http://dx.doi.org/10.3390/membranes11050329.

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The paper focused on the influence of operative conditions on the separation of benzoic acid from 10 °Brix cranberry juice by cross-flow nanofiltration with a plate and frame pilot scale (DDS Lab Module Type 20 system). Six kinds of commercial nanofiltration membrane were investigated. The results showed that the rejection of benzoic acid was significantly lower than that of other components in cranberry juice, including sugars and other organic acids. In a range of 2–7.5 L/min, feed flow rate slightly affected the performance of nanofiltration. Higher temperatures resulted in higher permeate

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18

MARTINEZ-FEREZ, ANTONIO, ANTONIO GUADIX, JOSE E. ZAPATA-MONTOYA, and EMILIA M. GUADIX. "Influence of transmembrane pressure on the separation of caprine milk oligosaccharides from protein by cross-flow ultrafiltration." International Journal of Dairy Technology 61, no. 4 (2008): 333–39. http://dx.doi.org/10.1111/j.1471-0307.2008.00434.x.

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19

Guerra, Katie, John Pellegrino, and Jörg E. Drewes. "Impact of operating conditions on permeate flux and process economics for cross flow ceramic membrane ultrafiltration of surface water." Separation and Purification Technology 87 (March 2012): 47–53. http://dx.doi.org/10.1016/j.seppur.2011.11.019.

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20

Pradanos, P., J. I. Arribas, and A. Hernandez. "Hydraulic Permeability, Mass Transfer, and Retention of PEGs in Cross-flow Ultrafiltration through a Symmetric Microporous Membrane." Separation Science and Technology 27, no. 15 (1992): 2121–42. http://dx.doi.org/10.1080/01496399208019470.

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21

Peeva, Polina D., Thomas Knoche, Thorsten Pieper, and Mathias Ulbricht. "Cross-flow ultrafiltration of protein solutions through unmodified and surface functionalized polyethersulfone membranes – Effect of process conditions on separation performance." Separation and Purification Technology 92 (May 2012): 83–92. http://dx.doi.org/10.1016/j.seppur.2012.03.013.

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22

Daud, Syarfi, Muhammad Reza, and Eqiu Alkahfi Tarif. "Pengaruh Tekanan Transmembran dan Konsentrasi Chemical Cleaning Agent (NaOH) pada Penyisihan Fosfat dari Limbah Laundry dengan Membran Ultrafiltrasi Aliran Cross Flow." Jurnal Teknologi Kimia Unimal 5, no. 2 (2017): 1. http://dx.doi.org/10.29103/jtku.v5i2.84.

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The rapid economic development and community activities increasingly crowded cause appearance laundry business that effect on the environment. Ultrafiltration membrane is one of wastewater treatment technologies, but membranes have limitations such as the occurrence of the phenomenon of concentration polarization and fouling. The research objective of this study the effect of variations in transmembrane pressure against the rejection percentage Phosphate and the effect of variations in transmembrane pressure, concentration of washing of the efficiency and effectiveness of washing the membrane.

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23

Md Saleh, Nur Izzati, Wan Azlina Wan Ab Karim Ghani, Siti Mazlina Mustapa Kamal, and Razif Harun. "Performance of Single and Two-Stage Cross-Flow Ultrafiltration Membrane in Fractionation of Peptide from Microalgae Protein Hydrolysate (Nannochloropsis gaditana)." Processes 9, no. 4 (2021): 610. http://dx.doi.org/10.3390/pr9040610.

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Cross-flow ultrafiltration (UF) membrane with two different configurations; single (10 kDa and 5 kDa) and two-stage (10/5 kDa) in fractionating microalgae protein hydrolysate (MPH) were studied to obtain a low molecular weight of peptide. The effect of flow rate, trans-membrane pressure (TMP), and pH in fractionating MPH were evaluated based on permeate flux and peptide transmission. The results showed that, for single UF membrane, optimum operating parameters were at a flow rate of 23 mL/min, TMP of 1.5 bar, and pH of 9, with permeate flux of 43.65 L/m2 h (10 kDa) and 55.42 L/m2 h (5 kDa) and

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24

Gaspar, Igor, Predrag Tekic, Andras Koris, Albert Krisztina, Svetlana Popovic, and Gyula Vatai. "CFD and laboratory analysis of axial cross-flow velocity in porous tube packed with differently structured static turbulence promoters." Chemical Industry 69, no. 6 (2015): 713–18. http://dx.doi.org/10.2298/hemind140312001g.

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Computational fluid dynamics (CFD) was used for modelling flow regime in a porous tube. This tube is an ultrafiltration membrane filter made from zirconium-oxide which is very effective in the separation of stable oil-in-water microemulsions, especially when the tube is filled with static mixer. The results of the CFD analysis were used in the preliminary optimisation of the static mixer?s geometry since it has significant effect the energy requirement of this advanced membrane technology. The self-developed static mixers were tested ?in vitro? from the aspect of separation quality and process

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25

Vukosavljevic, Predrag, Branka Bukvic, Miodrag Jankovic, Tanja Petrovic, and Snezana Stevanovic. "Change of juice color during raspberry processing in fruit juice and fruit juice concentrate." Journal of Agricultural Sciences, Belgrade 51, no. 1 (2006): 99–115. http://dx.doi.org/10.2298/jas0601099v.

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A change of anthocyanins under different conditions of enzymatic treatments, clarification and concentration was determined. A pectin preparation Klerzyme?120, manufactured by DSM, France, specific for "sour fruits" with pH below 3.2, was used for maceration and depectinization. Experiments were carried out by a laboratory hydraulic press. Raw raspberry juice was clarified either by membranes separation processes or by traditional treatments using gelatin and bentonite. For microfiltration and ultrafiltration processes, membrane cut-off should not be below 30,000 g/mol to prevent any color los

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26

Yuasa, Akira. "Drinking water production by coagulation-microfiltration and adsorption-ultrafiltration." Water Science and Technology 37, no. 10 (1998): 135–46. http://dx.doi.org/10.2166/wst.1998.0394.

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Microfiltration (MF) and ultrafiltration (UF) pilot plants were operated to produce drinking water from surface water from 1992 to 1996. Microfiltration was combined with pre-coagulation by polyaluminium chloride and was operated in a dead-end mode using hollow fiber polypropylene and monolith type ceramic membranes. Ultrafiltration pilot was operated in both cross-flow and dead-end modes using hollow fiber cellulose acetate membrane and was combined occasionally with powdered activated carbon (PAC) and granular activated carbon (GAC) adsorption. Turbidity in the raw water varied in the range

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27

Suhaimi, A., E. Mahmoudi, K. S. Siow, and M. F. Mohd Razip Wee. "Surface Modification of Polyamide Ultrafiltration Membrane by Plasma Polymerisation of Acrylic Acid." Sains Malaysiana 49, no. 12 (2020): 3043–50. http://dx.doi.org/10.17576/jsm-2020-4912-17.

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Increase in hydrophilicity of the filtration membrane could attribute to the fouling reduction and overall filtration performance. In this study, we employ a surface modification on polyamide (PA) membrane by using plasma polymerization with acrylic acid as the precursor by varying the deposition time from 1 to 10 min to induce hydrophilic surface of the membrane without changing the bulk properties of PA membrane. Cross-flow filtration of humic acid using the modified PA membrane was conducted to measure permeates flux and rejection. We calculate the fouling tendencies of each membrane and th

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28

Wu, Yue, Zhongguo Zhang, Peiran He, et al. "Membrane fouling in a hybrid process of enhanced coagulation at high coagulant dosage and cross-flow ultrafiltration for deinking wastewater tertiary treatment." Journal of Cleaner Production 230 (September 2019): 1027–35. http://dx.doi.org/10.1016/j.jclepro.2019.05.139.

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29

Salahi, A., and T. Mohammadi. "Oily wastewater treatment by ultrafiltration using Taguchi experimental design." Water Science and Technology 63, no. 7 (2011): 1476–84. http://dx.doi.org/10.2166/wst.2011.383.

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In this research, results of an experimental investigation on separation of oil from a real oily wastewater using an ultrafiltration (UF) polymeric membrane are presented. In order to enhance the performance of UF in API separator effluent treatment and to get more permeation flux (PF), effects of operating factors on the yield of PF were studied. Five factors at four levels were investigated: trans-membrane pressure (TMP), temperature (T), cross flow velocity (CFV), pH and salt concentration (SC). Taguchi method (L16 orthogonal array (OA)) was used. Analysis of variance (ANOVA) was applied to

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30

Das, Chandan, Sunando DasGupta, and Sirshendu De. "Simultaneous Separation of Mixture of Metal Ions and Aromatic Alcohol using Cross Flow Micellar‐Enhanced Ultrafiltration and Recovery of Surfactant." Separation Science and Technology 43, no. 1 (2008): 71–92. http://dx.doi.org/10.1080/01496390701764866.

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31

Barukčić, Irena, Rajka Božanić, and Ulrich Kulozik. "Influence of process temperature and microfiltration pre-treatment on flux and fouling intensity during cross-flow ultrafiltration of sweet whey using ceramic membranes." International Dairy Journal 51 (December 2015): 1–7. http://dx.doi.org/10.1016/j.idairyj.2015.07.002.

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32

Aljlil, Saad A. "Development of Red Clay Ultrafiltration Membranes for Oil-Water Separation." Crystals 11, no. 3 (2021): 248. http://dx.doi.org/10.3390/cryst11030248.

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In this study, a red clay/nano-activated carbon membrane was investigated for the removal of oil from industrial wastewater. The sintering temperature was minimized using CaF2 powder as a binder. The fabricated membrane was characterized by its mechanical properties, average pore size, and hydrophilicity. A contact angle of 67.3° and membrane spore size of 95.46 nm were obtained. The prepared membrane was tested by a cross-flow filtration process using an oil-water emulsion, and showed a promising permeate flux and oil rejection results. During the separation of oil from water, the flux increa

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33

Staszak, Katarzyna, Beata Redutko, and Krystyna Prochaska. "Removal of metal ions from aqueous solutions by micellar enhanced ultra-filtration (MEUF)." Polish Journal of Chemical Technology 12, no. 3 (2010): 62–65. http://dx.doi.org/10.2478/v10026-010-0036-8.

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Removal of metal ions from aqueous solutions by micellar enhanced ultra-filtration (MEUF) The results of preliminary research on the possibility of removing of chromium(III) and copper(II) ions from micellar solutions in MEUF were described. The effectiveness of metal ions removal in the classical UF and MEUF was compared. It was confirmed that in the classical UF the retention of metal ions is small, independent of the concentration of the feed solution. The cross-flow micellar enhanced ultrafiltration experiments showed the usefulness of this method for the separation of metal ions from mice

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34

Pellegrino, J., S. Wright, J. Ranvill, and G. Amy. "Predicting membrane flux decline from complex mixtures using flow-field flow fractionation measurements and semi-empirical theory." Water Science and Technology 51, no. 6-7 (2005): 85–92. http://dx.doi.org/10.2166/wst.2005.0625.

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Flow-Field Flow Fractionation (Fl-FFF) is an idealization of the cross flow membrane filtration process in that, (1) the filtration flux and crossflow velocity are constant from beginning to end of the device, (2) the process is a relatively well-defined laminar-flow hydrodynamic condition, and (3) the solutes are introduced as a pulse-input that spreads due to interactions with each other and the membrane in the dilute-solution limit. We have investigated the potential for relating Fl-FFF measurements to membrane fouling. An advection-dispersion transport model was used to provide ‘ideal’ (de

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35

Kołtuniewicz, A. "The new concept of flux enhancement during cell separation with MF/UF processes." Water Supply 1, no. 5-6 (2001): 381–86. http://dx.doi.org/10.2166/ws.2001.0137.

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The microfiltration and ultrafiltration processes are considered as matured membrane processes that are well established in industrial practice. Nevertheless, the main obstacles of their further development in the new competitive implementations are the economical problems. The key economic factors are permeate flux and energy consumption. However, although the cross-flow systems enable us to attain higher flux, it is usually very expensive. The high energy is consumed to maintain circulation velocity of the retentate that is sufficient for sweeping out the retained component from the membrane

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36

Bian, Rulin, Yoshimasa Watanabe, Norihito Tambo, and Genzo Ozawa. "Removal of Humic Substances by UF and NF Membrane Systems." Water Science and Technology 40, no. 9 (1999): 121–29. http://dx.doi.org/10.2166/wst.1999.0458.

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This paper deals with the removal efficiency and mechanisms of humic substances contained in a river water by ultrafiltration (UF) and nanofiltration (NF) membranes. UF membranes with molecular weight cut-off (MWCO) of 50 kDa to 200 kDa can remove only large molecular size humic substances (LMSHS). Even in the UF membranes operated under the cross-flow mode, the LMSHS were accumulated on the membrane surface, because the back transport velocity of LMSHS is always smaller than that of the permeate flux. Precoagulation enhanced the removal of humic substances effectively. The optimum coagulation

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37

Abd-Razak, Nurul Hainiza, M. N. Zairossani, Y. M. John Chew, and Michael R. Bird. "Fouling Analysis and the Recovery of Phytosterols from Orange Juice Using Regenerated Cellulose Ultrafiltration Membranes." Food and Bioprocess Technology 13, no. 11 (2020): 2012–28. http://dx.doi.org/10.1007/s11947-020-02541-7.

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Abstract This study describes the use of regenerated cellulose (RCA) membranes with molecular weight cut-off (MWCO) values of 10, 30, and 100 kDa, respectively, to separate phytosterols from orange juice for possible nutraceutical production. A desirable membrane separation rejects protein whilst transmitting phytosterols and other low molecular mass compounds such as sugars. The ultrafiltration was performed in a cross-flow membrane system with a total filtration area of 336 cm2. Total phytosterol analysis was carried out by using a Liebermann-Buchard-based method. Protein concentration was q

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38

Patil, P. N., and K. V. Marathe. "Selective Separation of Nickel (II) and Cobalt (II) from Waste Water by Using Continuous Cross-Flow Micellar Enhanced Ultrafiltration with Addition of Chelating Agent." Separation Science and Technology 48, no. 4 (2013): 547–53. http://dx.doi.org/10.1080/01496395.2012.690485.

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39

Quezada, Carolina, Humberto Estay, Alfredo Cassano, Elizabeth Troncoso, and René Ruby-Figueroa. "Prediction of Permeate Flux in Ultrafiltration Processes: A Review of Modeling Approaches." Membranes 11, no. 5 (2021): 368. http://dx.doi.org/10.3390/membranes11050368.

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In any membrane filtration, the prediction of permeate flux is critical to calculate the membrane surface required, which is an essential parameter for scaling-up, equipment sizing, and cost determination. For this reason, several models based on phenomenological or theoretical derivation (such as gel-polarization, osmotic pressure, resistance-in-series, and fouling models) and non-phenomenological models have been developed and widely used to describe the limiting phenomena as well as to predict the permeate flux. In general, the development of models or their modifications is done for a part

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40

Milić, Jania, Irena Petrinić, Andreja Goršek, and Marjana Simonič. "Ultrafiltration of oil-in-water emulsion by using ceramic membrane: Taguchi experimental design approach." Open Chemistry 12, no. 2 (2014): 242–49. http://dx.doi.org/10.2478/s11532-013-0373-6.

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AbstractIn this study, a Taguchi experimental design methodology was used to determine the importance of process parameters influencing the ultrafiltration (UF) of oil-in-water emulsions. Four parameters including pH (5–11), oil concentration (φ) (0.5–3% (v/v)), temperature (T) (25–45°C) and trans-membrane pressure (TMP) (1–5 bar) were studied at three levels. The highest flux was used as optimization criterion. In order to reduce the number of experiments, a Taguchi method was applied. Analysis of variance (ANOVA) was used to determine the most significant parameters affecting the optimizatio

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41

Yue, Caide, Hongmin Dong, Yongxing Chen, et al. "Direct Purification of Digestate Using Ultrafiltration Membranes: Influence of Pore Size on Filtration Behavior and Fouling Characteristics." Membranes 11, no. 3 (2021): 179. http://dx.doi.org/10.3390/membranes11030179.

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Ultrafiltration (UF) can effectively remove large particles, suspended solids, and colloidal substances from anaerobic digestate. However, membrane fouling is a technical challenge in the purification of the digestate by UF. In this study, polyethersulfone (PES) membranes with four pore sizes (50.0, 20.0, 10.0 and 5.0 kDa) were employed to filter anaerobic digestate from swine manure. The effects of temperature, transmembrane pressure (TMP), and cross-flow velocity (CFV) on flux were investigated. The purification effects and fouling characteristics of the four membranes were analyzed. The res

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42

Ebrahimi, Mehrdad, Axel A. Schmidt, Cagatay Kaplan, Oliver Schmitz, and Peter Czermak. "Innovative Optical-Sensing Technology for the Online Fouling Characterization of Silicon Carbide Membranes during the Treatment of Oily Water." Sensors 20, no. 4 (2020): 1161. http://dx.doi.org/10.3390/s20041161.

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The oil and gas industry generates a large volume of contaminated water (produced water) which must be processed to recover oil before discharge. Here, we evaluated the performance and fouling behavior of commercial ceramic silicon carbide membranes in the treatment of oily wastewaters. In this context, microfiltration and ultrafiltration ceramic membranes were used for the separation of oil during the treatment of tank dewatering produced water and oily model solutions, respectively. We also tested a new online oil-in-water sensor (OMD-32) based on the principle of light scattering for the co

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Seo, G. T., T. S. Lee, B. H. Moon, K. S. Choi, and H. D. Lee. "Membrane separation activated sludge for residual organic removal in oil wastewater." Water Science and Technology 36, no. 12 (1997): 275–82. http://dx.doi.org/10.2166/wst.1997.0457.

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A hybrid membrane separation activated sludge process was investigated for treatment of residual organic matter in oily wastewater from an automobile engine manufacturing plant. A bench scale experiment was conducted to identify the biodegradability of the residual organic matter in activated sludge reactors at various HRT (equal to SRT), such as 5, 10, 20, 30 days. Removal efficiency of higher than 90% was obtained in terms of SCOD at more than 10 day HRT showing the possibility of biological treatment. Ultrafiltration test was also carried out for the residual organics using cross-flow membr

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Elmaleh, S., and L. Abdelmoumni. "Experimental test to evaluate performance of an anaerobic reactor provided with an external membrane unit." Water Science and Technology 38, no. 8-9 (1998): 385–92. http://dx.doi.org/10.2166/wst.1998.0829.

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The coupling of a wastewater treatment anaerobic reactor with a microfiltration or ultrafiltration membrane is particularly attractive: lower sludge production than in an aerobic reactor, methane production and dissociation of the mean residence times of the different phases. However, the industrial development of such a process is hampered by membrane fouling which can be a result of many causes and require a comprehensive study especially fouling by anaerobic suspensions. In order to simplify the study, the different phases of anaerobic oxidation were separated and this work is focused on th

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Kim, Heejin, Intae Shim, and Min Zhan. "Chemical Enhanced Backwashing for Controlling Organic Fouling in Drinking Water Treatment Using a Novel Hollow-Fiber Polyacrylonitrile Nanofiltration Membrane." Applied Sciences 11, no. 15 (2021): 6764. http://dx.doi.org/10.3390/app11156764.

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A novel polyacrylonitrile (PAN)-based ultrafiltration (UF) hollow-fiber membrane was newly synthesized for nanofiltration (NF) applications. This semi-fully NF hollow-fiber membrane was characterized using a variety of analysis techniques. The membrane exhibited higher negative charge and hydrophilicity and lower surface roughness compared to the pristine UF hollow-fiber membrane. Experiments to study the performance and fouling were simulated under laboratory conditions in a cross-flow system and in–out mode using organic compounds, namely, humic acid and sodium alginate. The removal efficien

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Uman, Ahmet E., Robert A. Bair, and Daniel H. Yeh. "Assessment of an Anaerobic Membrane Bioreactor (AnMBR) Treating Medium-Strength Synthetic Wastewater under Cyclical Membrane Operation." Membranes 11, no. 6 (2021): 415. http://dx.doi.org/10.3390/membranes11060415.

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A lab-scale (6.2 L) anaerobic membrane bioreactor combined with a tubular, cross-flow, PVDF ultrafiltration membrane was developed and operated to assess the long-term fouling behavior of a cyclically operated anaerobic membrane bioreactor (AnMBR). The AnMBR was operated at 35 ± 1 °C for 200 days with a synthetic influent of 501 mg·L−1 COD to mimic municipal wastewater. The system exhibited high treatment performance with an average COD removal efficiency of 86.5 ± 6.4% (n = 20) and an average permeate COD concentration of 63.9 ± 31.1 mg·L−1. A clear permeate with an average turbidity of 0.6 ±

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Sousa, Mayko Rannany S., Jaime Lora-García, María-Fernanda López-Pérez, Asunción Santafé-Moros, and José M. Gozálvez-Zafrilla. "Operating Conditions Optimization via the Taguchi Method to Remove Colloidal Substances from Recycled Paper and Cardboard Production Wastewater." Membranes 10, no. 8 (2020): 170. http://dx.doi.org/10.3390/membranes10080170.

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Optimization of the ultrafiltration (UF) process to remove colloidal substances from a paper mill’s treated effluent was investigated in this study. The effects of four operating parameters in a UF system (transmembrane pressure (TMP), cross-flow velocity (CFV), temperature and molecular weight cut-off (MWCO)) on the average permeate flux (Jv), organic matter chemical oxygen demand (COD) rejection rate and the cumulative flux decline (SFD), was investigated by robust experimental design using the Taguchi method. Analysis of variance (ANOVA) for an L9 orthogonal array were used to determine the

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Harada, Hideki, Kiyoshi Momonoi, Shinichi Yamazaki, and Satoshi Takizawa. "Application of anaerobic-uf membrane reactor for treatment of a wastewater containing high strength particulate organics." Water Science and Technology 30, no. 12 (1994): 307–19. http://dx.doi.org/10.2166/wst.1994.0630.

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A cross-flow ultrafiltration (UF) membrane separation was applied to anaerobic process for treatment of a wastewater containing high proportion of particulate COD. A synthetic wastewater with the total strength of 5000 mg COD·1−1 consisting of soluble and particulate COD (cellulose) in the ratio of 1:1 was fed to the reactor. The reactor was operated for 190 days at two loading rates, i.e. 1.5 and 2.5 kg COD·m−3·d−1. More than 98% of COD removal was consistently achieved throughout the duration, and the system was furthermore likely to accommodate much higher loading. Although the permeate COD

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Ferreira, Franz Berbert, Grégori Ullmann, Luiz Gustavo Martins Vieira, Vicelma Luiz Cardoso, and Miria Hespanhol Miranda Reis. "Hydrodynamic performance of 3D printed turbulence promoters in cross-flow ultrafiltrations of Psidium myrtoides extract." Chemical Engineering and Processing - Process Intensification 154 (August 2020): 108005. http://dx.doi.org/10.1016/j.cep.2020.108005.

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Moslehyani, A., M. Mobaraki, A. F. Ismail, et al. "PVDF MEMBRANE FOR OIL-IN-WATER SEPARATION VIA CROSS-FLOW ULTRAFILTRATION PROCESS." Jurnal Teknologi 78, no. 1 (2015). http://dx.doi.org/10.11113/jt.v78.4469.

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The objective of this study is to investigate the potential of ultrafiltration polyvinylidene fluoride (PVDF)-titanium dioxide (TiO2) membrane for oil-in-water separator. PVDF polymeric matrix membrane is excellent in term of chemical and thermal stabilities, which make it very promising to be used as a membrane matrix for water separation. However, poor hydrophilic property of the PVDF has led to the severe fouling during operation. Thus, current work was performed to investigate the effect of incorporation of two additives i.e. polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) in PVDF

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