Performance of polyphenylsulfone solvent resistant nanofiltration membrane: effects of polymer concentration, membrane pretreatment and operating pressure

2016 ◽  
pp. 347-354
Keyword(s):  
Polymer Concentration ◽  
Operating Pressure ◽  
Nanofiltration Membrane ◽  
Membrane Effects ◽  
Membrane Pretreatment

scholarly journals The Application of Nanofiltration Membrane for Palm Oil Mill Effluent Treatment by Adding Polyaluminium Chloride (PAC) as Coagulant

2020 ◽  
Vol 15 (1) ◽  
pp. 1-9
Author(s):  
Jhon Armedi Pinem ◽  
Imanuel Tumanggor ◽  
Edy Saputra
Keyword(s):  
Palm Oil ◽  
Treatment Process ◽  
Oxygen Demand ◽  
Effluent Treatment ◽  
Palm Oil Mill Effluent ◽  
Operating Pressure ◽  
Nanofiltration Membrane ◽  
Palm Oil Mill ◽  
Flocculation Process ◽  
Polyaluminium Chloride

The rapid development of Crude Palm Oil (CPO) production has led to an increase in the production of Palm Oil Mill Effluent (POME) as well. POME will cause problems in the environment because contains high contaminants. This study aims to investigate the effect of the coagulant Polyaluminium Chloride (PAC) variations and the membrane’s operating pressure on the POME treatment process using the nanofiltration membrane (NF) with the coagulation-flocculation process as pre-treatment. The PAC was used in the coagulation-flocculation process with variations in concentration (5.0; 5.5; 6.0; 6.5; 7.0 g/L). The process was completed by a rapid stirring of 200 rpm for 5 minutes, followed with slow stirring at 60 rpm for 15 minutes and settling time for 30 minutes. The process of membrane nanofiltration was carried out for 60 minutes with variations in operating pressure (8.0; 9.0; and 10 bars). In each treatment process, effluent quality testing was carried out with Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), Total Suspended Solid (TSS) and oil/fat as parameters. In addition, an analysis of permeate fluxes and rejection of NF membrane was also carried out. The results of the analysis suggested that the best coagulant doses are 6.0 g/L with the reduction percentage of BOD, COD, TSS and oil/fat at 78.85%; 68.57%; 92.77% and 92.31% respectively. The highest percentage of NF membrane rejection was found at a pressure of 10 bar, which is equal to 94.71%; 94.86%; 97.92% and 95% respectively for BOD, COD, TSS and oil/fat with a flux value of 7.16 L/m2.hours.

scholarly journals The effects of operating parameters on spiramycin removal by nanofiltration membrane

2013 ◽  
Vol 68 (7) ◽  
pp. 1512-1519 ◽  
Author(s):  
Changwei Zhao ◽  
Weihong Fan ◽  
Tao Wang ◽  
Deyin Hou ◽  
Zhaokun Luan
Keyword(s):  
Operating Parameters ◽  
Operating Pressure ◽  
Nanofiltration Membrane ◽  
Flux Rate ◽  
Permeate Flux ◽  
Feed Concentration ◽  
Feed Temperature

Spiramycin removal from wastewater using four nanofiltration (NF) membranes (NF270, NF90, ESNA1-K1 and ESNA1-LF2-LD) was studied. The effects of operating pressure, feed temperature, feed concentration, cation and anion ions on the permeate flux rate and spiramycin rejection were investigated. The results show that increasing operating pressure resulted in the increase of both permeate flux and spiramycin rejection. The flux rate increased almost linearly with temperature, while the spiramycin rejection decreased. The permeate flux rate declined relatively with increasing feed concentration of spiramycin for NF270 and ESNA1-LF2-LD membranes compared with NF90 and ESNA1-K membranes. The presence of cations reduced spiramycin rejection, with the strength of influence for the NF270 NF membrane following the order Mg2+>Ca2+>K+. The presence of anions also resulted in decreased spiramycin rejection, the strength of the effect following the order NO3−>Cl−>SO42− for the NF270 membrane.

scholarly journals Cellulose Acetate and Supercritical Carbon Dioxide: Membranes, Nanoparticles, Microparticles and Nanostructured Filaments

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 162 ◽  
Author(s):  
Stefano Cardea ◽  
Iolanda De Marco
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Organic Solvent ◽  
Cellulose Acetate ◽  
Polymer Concentration ◽  
Operating Conditions ◽  
Experimental Plant ◽  
Operating Pressure ◽  
Industrial Sectors ◽  
Supercritical Carbon

Cellulose acetate (CA) is a very versatile biocompatible polymer used in various industrial sectors. Therefore, depending on the application, different morphologies are required. Different processes at industrial scale are commonly employed to obtain CA micro or nanoparticles (discontinuous structures) or CA membranes (continuous structures with discontinuities). In this work, two supercritical carbon dioxide (scCO2) based techniques, such as the semi-continuous supercritical antisolvent process (SAS) and the supercritical fluid phase inversion process, in which scCO2 plays the role of antisolvent, were employed. Varying the kind of organic solvent used to prepare the polymeric solution, the polymer concentration, and operating pressure and temperature, it was possible to tune the characteristics of the obtained material. In particular, using acetone as the organic solvent, filaments constituted by nanoparticles, expanded microparticles, nanoparticles with a mean diameter lower than 80 nm, and microporous membranes were obtained, varying the operating conditions. The attainment of spherical micron-sized particles was instead achieved using a mixture of acetone and DMSO as the organic solvent. Therefore, the versatility of the supercritical carbon dioxide-based techniques has been confirmed, and it was possible to obtain, using a single experimental plant, various morphologies of cellulose acetate (with controllable particles’ or pores’ diameters) by varying the operating conditions.

New Polyester Nanofiltration (NF) Membrane for Humic Acid Removal

2015 ◽  
Vol 1107 ◽  
pp. 383-388
Author(s):  
Nurul Ain Jalanni ◽  
Mazrul Nizam Abu Seman ◽  
Che Ku Muhammad Faizal Che Ku Yahya
Keyword(s):  
Reaction Time ◽  
Humic Acid ◽  
Interfacial Polymerization ◽  
Pure Water ◽  
Applied Pressure ◽  
Monomer Concentration ◽  
Operating Pressure ◽  
Nanofiltration Membrane ◽  
Treatment Technology ◽  
Two Phase

Interfacial polymerization of a thin film composite (TFC) layer on top of a miroporous support membrane or other porous substrate is one of adequate method to form nanofiltration membrane in order to remove humic acid. Ultrafiltration (UF) polyethersulfone (PES) was used as membrane base support. Reaction occurred on the surface of membrane between two phase which are triethanolamine (TEOA) and trimesoyl chloride (TMC) as aqueous solution and organic solution respectively. Membrane that produced characterized by permeability, charged solutes rejection including salt solutions (NaCl and Na2SO4) and humic acid removal. Properties of membrane can be attributed with the changes of monomer concentration and reaction time. Pure water flux Jw for membranes calculated as a function of applied pressure to membrane ΔP. Thus, flux increased linearly with operating pressure is applied to membrane where meets Hagen-Poiseuille equation and gradient of every straight line give pure water permeability data. The variation of reaction time (15, 25 and 35 min) at 8% (w/v) monomer concentrations can affect the properties of the membrane produced and decreasing water permeabilities. The rejection order of the membrane changed from 0.001 M Na2SO4 > 0.1M Na2SO4> 0.001M NaCl > 0.1M NaCl. Humic acid removal resulted almost fully rejection showed that nanofiltration membrane is one of the best methods in water treatment technology.

scholarly journals Membran nonofiltrasi untuk penghilangan ion valensi tinggi dan senyawa organik dari sumber air salinitas tinggi

2018 ◽  
Vol 5 (3) ◽  
pp. 478 ◽  
Author(s):  
Iman Ciptaraharja ◽  
Veronica S. Praptowidodo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Cellulose Acetate Membrane ◽  
Operating Pressure ◽  
Nanofiltration Membrane ◽  
Feed Concentration ◽  
Porous Support ◽  
Scanning Electron

Utilization of nanofiltration membrane for high valence ion and organic compound removing from high salinized water source.The influence of solvent selection to membrane morphology for cellulose acetate nanofiltration membrane preparation in mass transfer of a multistage reverse osmosis process is studied. Membrane is prepared via precipitation immersion technique. The polymer used in this study is cellulose acetate (CA) with a concentration of 25 %-w. The feed concentration of univalent ion solution (NaCl) is varied between 2000-16.000 mg/L. The operating pressure is adjusted such that the operating pressure is three times of the osmotic pressure of NaCl solution. The concentration of bivalent ion (CaCl2), trivalent ion (FeCl3), and organic substance (glucose) are 200 mg/L, 50 mg/L, and 100 mg/L, respectively. The morphology of the membrane is characterized using Scanning Electron Microscopy (SEM). Membrane CA-01 (CA/DMF/Water) is a nanofiltration membrane with a thinner active layer and a more porous support layer than membrane CA-02 (CA/Aceton/Watter) which is categorized as a reverse osmosis membrane. A reduced feed concentration (at a fixed operating pressure) gives an elevated flux however the rejection is decreased. Meanwhile, an elevated operating pressure (at a fixed feed concentration) gives an elevated flux and rejection. Membrane CA-01 has met the requirement as a nanofiltration membrane since it gives 66 % rejection for NaCl at 20 Bar. At the same operating pressure, membrane CA-01 gives rejection for CaCl2, FeCl3, and glucose of 80.45%, 82.14%, and 83.42%, respectively.Keywords: Cellulose Acetate, Membrane, Multistage, Nanotiltration, Reverse Osmosis, Saline WaterAbstrakPenelitian ini dilakukan untuk mempelajari pengaruh jenis pelarut dalam pembuatan membran nanofiltrasi dari polimer selulosa asetat terhadap struktur morfologi membran dalam peristiwa perpindahan massa pada proses pemisalan osmosis balik multitahap. Teknik pembuatan membran yang digunakan adalah presipitasi imersi. Polimer membran yang digunakan adalah seulosa asetat (CA) pada konsentrasi 25 %-berat. Umpan yang digunakan adalah larutan ion valensi satu (NaCl) dengan variasi konsentrasi antara 2000 hingga 16.000 mg/L. Tekanan operasi diatur sedemikian rupa sehingga nilai rekanan operasi adalah sekitar tiga kali tekanan osmotik larutan NaCl. Percobaan juga dilakukan untuk umpan larutan ion valensi dua (CaCl2), ion valensi tiga (FeCl3), dan senyawa organik (glukosa) dengan konsentrasi, berturut-turut, adalah 200 mg/L, 50 mg/L,  dan 100 mg/L. Struktur morfologi membran diuji menggunakan metoda Scanning Electron Microscopy (SEM). Membran CA-01 (CA/DMF/Air) merupakan membran nanofiltrasi dengan lapisan aktif yang lebih tipis dan ukuran pori lapisan penyangga yang lebih besar daripada membran CA-02 (CA/Aseton/Air), yang termasuk ke dalam membran osmosis balik. Penurunan konsentrasi umpan pada tekanan operasi yang tetap memberikan nilai fluks yang meningkat, namun memberikan nilai rejeksi yang menurun. Sementara itu, peningkatan tekanan operasi pada konsentrasi umpan yang tetap akan memberikan nilai fluks dan rejeksi yang meningkat. Membran CA-01 telah memenuhi persyaratan sebagai membran nanofiltrasi dengan rejeksi NaCl mencapai 66 % pada tekanan 20 Bar. Pada tekanan yang sama membran CA-01 memberikan nilai rejeksi untuk CaCl2, FeCl3, dan glukosa berturut-turut sebesar 80,45%, 82,14%, dan 83,42 %.Kata Kunci: Air Salinitas Tinggi, Membran, Multitahap, Nanofiltrasi, Osmosis Balik, Selulosa Asetat.

Fouling of nanofiltration membrane: Effects of NOM molecular weight and microcystins

Desalination ◽  
2013 ◽  
Vol 315 ◽  
pp. 149-155 ◽  
Author(s):  
Margarida Ribau Teixeira ◽  
Vânia Serrão Sousa
Keyword(s):  
Molecular Weight ◽  
Nanofiltration Membrane ◽  
Membrane Effects
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