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Dissertations / Theses on the topic 'Membrane treatments'

Author: Grafiati
Published: 20 July 2024
Last updated: 31 July 2025

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1

Pinos, Vélez Verónica Patricia. "Development and optimization of catalytic membrane reactors for wastewater treatments." Doctoral thesis, Universitat Rovira i Virgili, 2016. http://hdl.handle.net/10803/365578.

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Es van obtenir diferents reactors catalítics de membrana (RCM) de membrana de fibra buida de Corindó i nanopartícules de Pd obtingudes per diferents metodologies: humitat incipients impregnació, polvorització catòdica, microemulsió i aliatge amb coure pel mètode de Poliol. RCMs es van provar en medi aquós, pressió ambiental i temperatura o 60 c en generació in situ de peròxid d'hidrogen, l'oxidació i hidrogenació de fenol i ibuprofè i reducció de Cr (VI). La RCM ha actuat com interfície catalítica per tal d'activar l'hidrogen i que reaccione amb oxigen o compost orgànic o inorgànic. La RCM imp
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2

Wu, Hong. "Sulfate radical based ceramic catalytic membranes for water treatments." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2020. https://ro.ecu.edu.au/theses/2382.

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The discharge of antibiotics into natural aquatic environment without proper treatments results in the propagation of antibiotics-resistant strains. Effective remediation technologies are therefore urged to remove those emerging contaminants from water. However, antibiotics are difficult to be degraded through a traditional biological treatment because they would deactivate the effective bacteria used in the process. Advanced oxidation processes (AOPs) using highly reactive oxygen species (ROS) such as hydroxyl radicals ( OH) and sulfate radicals (SO4 •− • ) have been widely employed as an eff
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3

Gandi, Ravikishor. "Treatments of hemi caustic and extractives streams." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44781.

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Disposal of effluent from pulp and paper industry is one of the major problems faced by entrepreneur in view of increasing environmental standards day by day. In addition to this, industry loses economic value by disposing the effluent or selling it for a low price to other industries. Therefore, to address this problem, in the present study, 2 pulp mill effluents were selected to recover the economic value namely Hemi caustic stream and brown stock filtrate. As far as the recovery of value of hemi caustic stream is concerned, freeze concentration technique was used to recover water in its p
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4

Yu, Feiran. "Physicochemical Modifications of Milk Fat Globule Membrane Proteins During Temperature Processing of Milk." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534770720065921.

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5

Francis, A. "The effects of ageing and low temperature pre-sowing treatments on the membrane status and germination performance of tomato seeds." Thesis, University of Bedfordshire, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304311.

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6

Maxwell, Deborah. "REMEDIATION OF HEAVY METAL CONTAMINATION IN SEDIMENTS: APPLICATION OF IN SITU TREATMENT UTILIZING EMULSIFIED LIQUID MEMBRANE AN." Master's thesis, University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4329.

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Heavy metal contamination of soils, sediments and groundwater presents an ongoing source of hazardous and persistent environmental pollution. How best to remediate these contaminants is the impetus of continuing research efforts. Methods include containment, ex situ and in situ techniques. A successful in situ method utilizing a combination of emulsified liquid membranes, ELM, and zero-valent metal, ZVM, and bimetals has demonstrated impressive heavy metal reduction in 100 ppm solutions of Cd, Cu, Ni, Pb, Cr and U. This promising in situ method has been employed by the Industrial Chemistry Lab
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7

Osborn, Shawn James. "Morphological and Mechanical Properties of Dispersion-Cast and Extruded Nafion Membranes Subjected to Thermal and Chemical Treatments." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/37517.

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The focus of this research project was to investigate morphological and mechanical properties of both extruded and dispersion-cast Nafion® membranes. The project can be divided into three primary objectives; obtaining a fundamental understanding of the glass transition temperature of Nafion®, determining the effect of thermal annealing treatments on the morphology and mechanical properties of dispersion-cast Nafion®, and examination of dispersion-cast Nafion® subjected to an ex-situ, Fentonâ s chemical degradation test. Nafion®, a perfluorosulfonate ionomer, is considered a commerciall
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8

MANIGAS, LUISA. "Use of membrane bioreactors for the bioremediation of groundwater polluted by chlorinated compounds." Doctoral thesis, Università degli Studi di Cagliari, 2008. http://hdl.handle.net/11584/265895.

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The aim of this experimental work has been the application of a new polluted waters treatment technology for the selection of a bacterial population capable of bioremediating a synthetic groundwater polluted by four different chlorinated compounds. The innovative technology applied in this study was the biological treatment system known as MSBR (Membrane Sequencing Bioreactor), which consists of a Sequencing Batch Reactor (SBR) coupled to a membrane module for the filtration of the biological sludge that degrades the chlorinated compounds present in the polluted water fed to the system. The sy
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9

Wagh, Priyesh Ashokrao. "SYNTHESIS OF BIOLOGICALLY-INSPIRED NANOFILTRATION MEMBRANES USING PROTECTED, MUTATED, AND SIMULATED AQUAPORINS." UKnowledge, 2018. https://uknowledge.uky.edu/cme_etds/92.

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Gram-negative bacterial cells are surrounded by a cell membrane which protects the cell and controls the transport of nutrients and waste products in and out of the cells at a fast rate. This rapid transport of nutrients and wastes through the cell membrane is made possible by channel proteins called porins. Various types of porins present in the cell membrane have specific functions depending on their selectivity towards different nutrients, and channel proteins selective towards water are called aquaporins. These proteins restrict the passage of all entities except water molecules and they p
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10

Timoteo, J?nior Jos? Fl?vio. "Membrana de alumina an?dica: comportamento da microestrutura e estudo das propriedades ?pticas ap?s tratamento t?rmico." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/12798.

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Made available in DSpace on 2014-12-17T14:07:09Z (GMT). No. of bitstreams: 1 JoseFTJ_TESE.pdf: 4834280 bytes, checksum: 1a618560296186081bd6c34117d226be (MD5) Previous issue date: 2012-07-04<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>Thin commercial aluminum electrolytic and passed through reactions was obtained with anodic alumina membranes nanopores. These materials have applications in areas recognized electronic, biomedical, chemical and biological weapons, especially in obtaining nanostructures using these membranes as a substrate or template for processing nanowi
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11

Chung, Kyung Sun. "Membrane Distillation for Leachate Treatment with Fenton Pre-Coagulation Treatment Process." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/96701.

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Landfill leachate is considered as a complex wastewater with various organic and inorganic species which must meet strict discharge standards before its release. Due to such high concentration of diverse pollutants, leachate is low in biodegradation; therefore, a proper usage of physicochemical treatments is required. In this study, membrane distillation (MD) has been used along with Fenton treatment process for pre-coagulation to achieve an effective removal of contaminants. MD is a technology derived with vapor pressure difference across the hydrophobic membrane which traps the feed-wastewat
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King, Stanley Wayne. "Mass Transfer Analysis of Polyether Sulfone and Polyamide Membranes Modified by Ion Beam Irradiation." University of Toledo / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1083875419.

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13

Chen, Jeffrey Bou-Wei. "Membrane bioreactors for anaerobic treatment of wastewaters." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/32045.

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Anaerobic treatment of municipal wastewaters or other wastewaters of weaker strength has conventionally been difficult, especially in regions of cooler climate. Issues with solids retention and sufficient biomass concentration and activities required for treatment are usually of primary concern in these situations. However, the recent incorporation of membranes in the anaerobic treatment of municipal wastewater has made this technology feasible through the absolute retention of biomass within the reactor. Among the many advantages this technology has over its aerobic membrane bioreactor
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Brookes, Adam. "Immersed membrane bioreactors for produced water treatment." Thesis, Cranfield University, 2005. http://dspace.lib.cranfield.ac.uk/handle/1826/4508.

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The performance of a submerged membrane bioreactor for the duty of gas field produced water treatment was appraised. The system was operated under steady state conditions at a range of mixed liquor suspended solids (MLSS) concentrations and treatment and membrane performance examined. Organics removal (COD and TOC) display removal rates between 90 and 97%. Removal of specific target compounds Benzene, Toulene, Ethylbenzene and Xylene were removed to above 99% in liquid phase with loss to atmosphere between 0.3 and 1%. Comparison of fouling rates at a number of imposed fluxes has been made betw
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15

Fawehinmi, Folasade. "Anaerobic membrane bioreactors for municipal wastewater treatment." Thesis, Cranfield University, 2006. http://dspace.lib.cranfield.ac.uk/handle/1826/8042.

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Anaerobic treatment has historically been considered unsuitable for the treatment of domestic wastewaters. The work presented in this thesis focuses on the incorporation of membranes into the anaerobic bioreactor to uncouple solid retention time and hydraulic retention time. This in turn prevents biomass washout and allows sufficient acclimatisation periods for anaerobes. However, the exposure of membranes to anaerobic biomass comes with its own inherent problems namely fouling. Fouling was found to take place in two stages; a rapid phase characterised by solid and bacterial cell deposition an
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Chtourou, Mariem. "Pharmaceutical and personal care products removal by advanced treatment technologies." Doctoral thesis, Universitat de Girona, 2018. http://hdl.handle.net/10803/664966.

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This thesis evaluates different technologies for treating wastewater with high concentrations of PPCPs. Firstly, a state-of-art revision of advanced treatment technology for removing Triclosan (TCS) from waste water was carried out in an attempt to evaluate the most favourable technologies and discern any major limiting factors. The technological categories evaluated were: (i) adsorption, (ii) advanced oxidation processes, and (iii) membrane technology. The results found in the second chapter are based on treating three PPCP compounds in a cyclic anoxic/aerobic membrane bioreactor. In fact,
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17

Pacholik, Lucy C. "USE OF FUNCTIONALIZED BIMETALLIC MEMBRANES FOR TREATMENT OF CONTAMINATED GROUNDWATER AT A HAZARDOUS WASTE SITE IN KENTUCKY." UKnowledge, 2019. https://uknowledge.uky.edu/ce_etds/83.

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Providing access to clean drinking water will continue to be a challenge for civil engineers for generations to come. Since many communities around the world rely on groundwater as a source of drinking water, remediation technologies must be implemented at sites where groundwater contamination exists due to years of mismanagement of hazardous waste. Using nanosized zero-valent metals such as iron and zinc embedded within and on the surface of functionalized (PAA) membrane filters has shown to be an effective dechlorination technique for contaminated groundwater. Introducing a noble metal such
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18

Handelsman, Timothy David. "Membranes for Biorefineries." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14569.

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This thesis tested the hypothesis that whilst membranes may enable biorefineries to meet discharge specifications, such ‘end-of-pipe’ treatment options are sub-optimal. Greater savings can potentially be made by internal and/or upfront use of membranes. Biorefineries are used to make a wide range of products from substrates such as molasses, corn syrup and cellulosic materials, producing biofuels, pharmaceutical products and mass production of various microorganisms. These are generally produced at low concentrations, resulting in large amounts of wastewater. These wastewaters also contain hig
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19

Fonseca, Anabela Duarte. "Denitrification in Membrane Bioreactors." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/35212.

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Three membrane bioreactors, a low flux filter (LFF), a diafilter (DF), and an ion-exchange (IE) membrane bioreactor were used to treat water polluted with 50 ppm-N nitrate. The three systems were compared in terms of removal efficiency of nitrate, operational complexity, and overall quality of the treated water. In the low flux filter (LFF) membrane bioreactor an hemo-dialysis hollow fiber module was used and operated continuously for 29 days with a constant flux of permeate. The performance of the system was constant during the span of the experiment, which demonstrated that when the module
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Pavasant, Prasert. "Modelling of the extractive membrane bioreactor process." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266478.

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21

Escalona, Hernández Ivonne Graciela. "Membrane-assisted advanced oxidation processes for wastewater treatment." Doctoral thesis, Universitat Rovira i Virgili, 2014. http://hdl.handle.net/10803/284445.

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El bisfenol A (BPA) i la tartrazina (TAR) pertanyen al grup de compostos que són potencialment nocius per a la recuperació d'aigües residuals. El BPA és un disruptor del sistema hormonal o disruptor endocrí, mentre que la TAR és un colorant azoic. Una diversitat d'indústries, especialment la indústria paperera i tèxtil, produeixen un gran volum d'aigües residuals que estan contaminades amb BPA i colorants. Per tant, els efluents que contenen tant BPA com colorants han de ser gestionats de manera eficient amb la finalitat d'evitar problemes ambientals vinculats a ells. Durant l'última dècada,
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22

Hu, Alan Yung-Chih. "Anaerobic in-tank membrane bioreactor for wastewater treatment." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414422.

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23

Alvarez-Vazquez, H. "Membrane bioreactors for sewage and stabilised leachate treatment." Thesis, Cranfield University, 2005. http://dspace.lib.cranfield.ac.uk/handle/1826/11104.

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The project aimed to extend the limited knowledge ofMBR (Membrane Bioreactor) operation for the treatment of stabilised (old) landfillleachate using an air-lift tubular membrane configuration and comparing the results with those obtained for sewage treatment under largely identical conditions. SRT (solids retention time) was used as the principal fixed variable in the two trials so as to allow comparison of process performance for the two different feedwaters. Supplementary tests were also conducted on: 1. bench-scale porous pots, used to identify the optimum HRT (hydraulic retention time) val
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Alvarez-Vazquez, Héctor. "Membrane bioreactors for sewage and stabilised leachate treatment." Thesis, Cranfield University, 2005. http://dspace.lib.cranfield.ac.uk/handle/1826/11104.

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The project aimed to extend the limited knowledge ofMBR (Membrane Bioreactor) operation for the treatment of stabilised (old) landfillleachate using an air-lift tubular membrane configuration and comparing the results with those obtained for sewage treatment under largely identical conditions. SRT (solids retention time) was used as the principal fixed variable in the two trials so as to allow comparison of process performance for the two different feedwaters. Supplementary tests were also conducted on: 1. bench-scale porous pots, used to identify the optimum HRT (hydraulic retention time) val
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25

RAO, PRASANNA. "TREATMENT OF ACID MINE DRAINAGE USING MEMBRANE BIOREACTOR." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1006887417.

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26

Phelane, Lisebo. "Metal nanoparticle modified polysulfone membrane for water treatment." Thesis, University of the Western Cape, 2013. http://hdl.handle.net/11394/4480.

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>Magister Scientiae - MSc<br>Membrane separation processes have been widely applied in the treatment of wastewater with polysulfone (PSF) polymer membrane being the most frequently used in ultrafiltration of wastewater due to its chemical and structural stability and mechanical robustness. The disadvantage to these membranes is their hydrophobicity which leads to membrane fouling caused by organic pollutants in water. Many studies have been conducted to increase the hydrophilic properties of the polysulfone membrane surface. Most recently metal oxide nanoparticles have been introduced to the p
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Banks, Stacie. "The treatment of landfill leachate using an MFUF membrane system: Focusing on membrane fouling." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26572.

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Membrane systems are being used increasingly throughout the western world to treat landfill leachate as environmental regulations tighten. This work examined leachate filtration using a bench-scale MF/UF membrane system, focussing on surface fouling and constituent reductions at the Trail Road Landfill in Ottawa, Ontario. The study found that ultrafiltration membranes with a molecular weight cut-off of 10 KDa and below gave the best overall leachate treatment. A 1 KDa ultrafiltration membrane gave the highest percent removals overall of all the membranes tested, but had one of the lowest stead
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Keen, Michael. "Evaluation of the impact of membrane change at a membrane softening water treatment plant." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002961.

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29

Semião, Andrea J. C. "Removal of adsorbing estrogenic micropollutants by nanofiltration membranes in cross-flow : experiments and model development." Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/5742.

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Nanofiltration (NF) can be used in water and wastewater treatment as well as water recycling applications, removing micropollutants such as hormones. Due to their potential health risk it is vital to understand their removal mechanisms by NF membranes aiming at improving and developing more effective and efficient treatment processes. Although NF should be effective and efficient in removing small molecular sized compounds such as hormones, the occurrence of adsorption onto polymeric membranes results in performances difficult to predict and with reduced effectiveness and efficiency. This stud
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Goldman, Joshua E. "Relationship between biofilm removal and membrane performance using Dunedin reverse osmosis water treatment plant as a case study." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002162.

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31

Yan, Bing. "Effects of Thermal Treatments on Perfluorosulfonate Ionomer Membranes." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/44195.

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Perfluorosulfonate ionomer (PFSI) membranes were annealed at elevated temperature for various periods of time in order to investigate the morphological effects of thermal treatments. For Nafion® 117, the DSC thermograms of Na+-, Cs+- and tetramethylammonium(TMA+)-form membranes show an endothermic peak develops upon annealing at 200ºC, indicating the development of crystallinity in the membrane. For these three samples annealed under same conditions, the heat of fusion (ΠH) values of the endothermic event increases with increasing counterion size. Larger tetraalkylammonium ions, tetraethyla
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Walker, Steven. "Hollow Fiber Ultrafiltration of Ottawa River Water: Impact of Different Pre-treatment Schemes." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31323.

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To minimize membrane fouling many water treatment plants pre-treat water prior to microfiltration (MF) or ultrafiltration (UF). Coagulation/flocculation/sedimentation is a common form of pre-treatment, but little research has been conducted on floatation as a part of the pre-treatment. The objective of this thesis is to compare pre-treatment with floatation and with sedimentation for Ottawa River water, a typical Northern Canadian water with a high natural organic matter (NOM) content and a large hydrophobic (HPO) NOM fraction. Fouling tests consisted of multiple filtration/backwashing cycles
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Giacobbo, Alexandre. "Biorreator à membrana aplicado ao tratamento de efluentes." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/26538.

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A preocupação com a qualidade das águas está intensificando estudos com tecnologias avançadas para tratamento de efluentes. Uma tecnologia promissora no Brasil é a de biorreatores à membrana (MBR), pois há a possibilidade de trabalhar com altas taxas de aplicação e ainda pode obter um efluente tratado passível de reuso. Assim, o presente trabalho teve por objetivo estudar um MBR com módulo de membranas externo. Para tanto, foram estipulados os parâmetros operacionais em ensaios preliminares, tais como compactação da membrana, permeabilidade hidráulica e permeabilidade ao lodo ativado. Desta fo
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Alkmim, Aline Ribeiro. "Membrane Bioreactor for treating petroleum refinery effluent: treatment performance, membrane fouling mechanism and fouling control." Universidade Federal de Minas Gerais, 2015. http://hdl.handle.net/1843/BUBD-9Y2HVT.

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The work developed discusses the potential use of MBR to treat refinery effluent and operational strategies that may mitigate fouling. At first, MBR performance was evaluated in terms of pollutants removal and fouling investigation in conditions of shock load. The results demonstrated that MBR was able to reduce effectively the pollutants, meeting guideline standards of disposal and reuse for non-potable ends. FTIR results showed that organic matter was removed by biological oxidation and/or retained by adsorption in the biological sludge or retention in the UF membrane. Furthermore, SMP was p
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Abegglen, Christian Konrad. "Membrane bioreactor technology for decentralized wastewater treatment and reuse /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17998.

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36

Bernat, Camí Xavier. "Treatment of biorefractory wastewater through membrane-assisted oxidation processes." Doctoral thesis, Universitat Rovira i Virgili, 2010. http://hdl.handle.net/10803/8583.

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La escasez de agua se presenta como uno de los mayores retos para asegurar el desarrollo sostenible. Entre otras actuaciones, se deben investigar e implementar sistemas eficientes de tratamiento de aguas biorecalcitrantes, que necesitan ser condicionadas antes de su depuración biológica. Uno de los posibles pre-tratamientos es el proceso Fenton de oxidación avanzada, que presenta dos principales inconvenientes: la utilización de sales de hierro como catalizador homogéneo, que abandonan continuamente la etapa de oxidación, y el elevado consumo de oxidante, en parte desaprovechado. La presente t
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Lambie, Mark Robert. "Local membrane versus systemic consequences of peritoneal dialysis treatment." Thesis, Keele University, 2015. http://eprints.keele.ac.uk/2328/.

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The primary intent of this thesis is to delineate the relative roles of local membrane and systemic consequences of peritoneal dialysis therapy, with particular reference to the role of inflammation and a severe, uncommon complication, encapsulating peritoneal sclerosis (EPS). Data sources comprised observational cohort studies as well as registry data: the Stoke PD study, a single centre study with clinical data, the Global Fluid Study (GFS), a multinational study with clinical data and repeated dialysate and plasma samples, and Scottish Renal Registry (SRR) and AnzData registry data. Through
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Murray, Simon Thomas. "Applications of membrane aerated biofilm reactors for wastewater treatment." Thesis, Queen's University Belfast, 2016. https://pure.qub.ac.uk/portal/en/theses/applications-of-membrane-aerated-biofilm-reactors-for-wastewater-treatment(af60a6ed-09b7-4b95-8730-d3de83b3876e).html.

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Despite being the subject of peer reviewed research since the mid-1980s, the conservative nature of the wastewater treatment industry means that the commercial application of membrane aerated biofilm reactors has not realized the potential that the published research demonstrates. The early research demonstrated the ability of membrane aerated biofilm reactors to achieve good levels of pollutant removal from various types of wastewater, but also exposed several weaknesses of the technology (i.e. cost of membranes, control of biofilm thickness) which have prevented the concept of MABfRs being d
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Facey, Roderick M. "Treatment of pulp mill membrane concentrates by freeze-thaw." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ39525.pdf.

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Hurd, Sarah M. "Low-pressure reverse osmosis membrane treatment of landfill leachate." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0025/MQ52299.pdf.

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Skouteris, George S. "Low energy membrane bioreactors for decentralised waste water treatment." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527518.

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42

Janus, Tomasz. "Modelling and simulation of membrane bioreactors for wastewater treatment." Thesis, De Montfort University, 2013. http://hdl.handle.net/2086/9507.

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The work presented in this thesis leads to the formulation of a dynamic mathematical model of an immersed membrane bioreactor (iMBR) for wastewater treatment. This thesis is organised into three parts, each one describing a different set of tasks associated with model development and simulation. In the first part, the Author qualitatively and quantitatively compares various published activated sludge models, i.e. models of biochemical processes associated with bacterial growth, decay, lysis and substrate utilisation in activated sludge systems. As the thesis is focused on modelling membrane bi
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Hopkins, Janet. "Plasma treatment of polysulfone gas separation membranes." Thesis, Durham University, 1995. http://etheses.dur.ac.uk/5231/.

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The chemical and topographical nature of a polymer surface can be changed by non-equilibrium glow discharge treatment. Surface modification of polysulfone and polyethersulfone was examined using a variety of plasma treatments at a fixed power, pressure and treatment time. The modification observed was found to be dependent upon the type of feed gas employed. Tetrafluoromethane plasmas fluorinate polymer surfaces. The influence of polymeric structure on the extent of modification was examined. Phenyl ring containing polymers experienced a greater extent of modification compared to saturated pol
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Saleem, Mubbshir. "Application of dynamic membranes in wastewater treatment." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3422308.

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The research highlighted the performance of dynamic membrane (DM) in most challenging conditions where advanced technologies like MBR etc. have been successfully applied. In this regard, treatment of old landfill leachate, production of bio hydrogen and enrichment of Anammox bacteria was mostly focused. The research also presented the strategies to expedite the formation of DM under both aerobic and anaerobic conditions. Pneumatic In situ cleaning mechanism was also proposed and proved to be effective in speedy and effective permeability recovery of excessively fouled DM under anaerobic condit
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Strachan, Laura Fay. "The Extractive Membrane Bioreactor : flux enhancement and biofilm control." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266892.

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46

Ferrer, Mallén Olga. "Substitution of conventional pre-treatment units by membrane based processes in drinking water treatment." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/334975.

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This thesis focused on the feasibility of substituting, partially or totally, drinking water treatment plant (DWTP) conventional pre-treatment by membrane based units, in particular by ultrafiltration (UF). For such purpose, bench and pilot scale tests with natural water were conducted, first, to address the technical feasibility and, second, to optimize its performance in order to determine whereas the proposed scheme was competitive from hydraulic and quality perspectives with the current conventional pre-treatment. Moreover, tailored microbes based tests were defined to assess its proper fu
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47

Lindroos, Magnus. "Utveckling av en kontinuerlig process som renar vatten från läkemedel med hjälp av biopolymertäckta celler." Thesis, KTH, Skolan för bioteknologi (BIO), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172100.

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48

Wei, Chunliang. "Nutrient removal and fouling reduction in electrokinetic membrane bioreactor at various temperatures." Water Science. & Technology, 2009. http://hdl.handle.net/1993/31635.

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With the aim of mitigating membrane fouling, an electrocoagulation (EC) based electrokinetic membrane bioreactor (EMBR) was developed and operated with real municipal wastewater under low temperatures. Both batch tests and continuous EMBR experiments demonstrated the significant advantages in membrane fouling reduction over the conventional antifouling strategies, ushering its potential applications as an attractive hybrid MBR technology for decentralized wastewater treatment in remote cold regions. The main research observations and findings could be summarized as follows: (1). Effective memb
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49

Berg, Josephine. "An Ion-Selective Electrode for Detection of Ammonium in Wastewater Treatment Plants." Thesis, KTH, Kemi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298183.

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Att följa ammonium i reningsverk är avgörande för att förbättra reningsprocessen och kontrollera flödet av föroreningar ut till ekosystemet. Jonselektiva elektroder (ion-selective electrodes, ISEs) är en lovande teknik inom området, där polymermembran baserade på nonactin är de mest studerade membranen för ammoniumsensorer. Membranet droppas tillsammans med ett jon-till-elektron transducerande material på ett elektrodsubstrat av grafit eller glasartat kol. Nonactin-baserade jonselektiva elektroder har typiskt en detektionsgräns inom storleksordningen 10-5 M, men uppvisar betydande kaliuminterf
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50

Muya, Francis Ntumba. "Hydrophilic Polysulfone-Hydrogel Membrane Material for Improved Nanofiltration in Wastewater Treatment." University of the Western Cape, 2013. http://hdl.handle.net/11394/4274.

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>Magister Scientiae - MSc<br>Over the last decade polysulfone membranes have been demonstrated to be one of the best membrane types in wastewater treatment, especially in ultrafiltration, owing to its mechanical robustness, structural and chemical stability. Regrettably these membranes are mostly hydrophobic by nature and therefore highly vulnerable to fouling due to chemosorptive mechanisms. Fouling may be caused by cake formation on the surface of the membrane or by surface assimilation of the foulants. Many studies have been directed at improving hydrophilic properties of polysulfone
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