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Tesi sul tema "Reverse osmosis process"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Al, Shaalan Hakem. "Artifical neural network modelling of reverse osmosis process." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/9516.

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With the increase in population and the scarcity of fresh water in the Middle East desalination has taken an important role in the provision of water for everyday use and for industrial purposes. Reverse osmosis water treatment process is of particular interest as it is one of the key processes in a desalination plant. The modelling of this process and the prediction of permeate flow is useful in better understanding the process. In the present study, an artificial neural network based model was developed based on plant data for the prediction of permeate flow performance. Plant data was colle

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2

Mane, Pranay P. "RO Process Optimization Based on Deterministic Process Model Coupled with Stochastic Cost Model." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14486.

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A survey performed over existing two pilot-scale and two full-scale RO desalination facilities to study the current status of boron rejection showed a highest rejection 85% leading to permeate boron concentration of 0.52 mg/L, and recent studies predicted a cost increase due to incorporation of boron reduction systems. Mathematical models were developed to study the process performance and related cost implications. The deterministic process model was verified with pilot-scale experiment performed using a single spiral wound module and was later modified to represent the full-scale design op

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3

Chong, Brian S. H. "The removal of pesticides and heavy metals by reverse osmosis." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42126.

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4

Miyashita, Yu. "Removal of N-nitrosamine by Nanofiltration and Reverse Osmosis Membranes." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14490.

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The rejections of selected N-nitrosamines by commonly used high-pressure nanofiltration (NF) and reverse osmosis (RO) membranes were quantitatively evaluated using a bench-scale cross-flow filtration apparatus. The selected nitrosamines included N-nitrosodimethylamine (NDMA), N-nitrosomethylethylamine (NMEA), N-nitrosopyrrolidine (NPYR), N-nitrosodiethylamine (NDEA), N-nitrosodi-n-propylamine (NDPA), N-nitrosodi-n-butylamine (NDBA) and N-nitrosodiphenylamine (NDPHA). Nitrosamine rejections were evaluated under steady state at elevated feed concentrations, since NDMA rejections were found to be

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5

Schutte, Christiaan Frederik. "The feasibility of reverse osmosis as a water reclamation process with special reference to the rejection of organic compounds." Doctoral thesis, University of Cape Town, 1986. http://hdl.handle.net/11427/22470.

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This thesis deals with water reclamation and water reuse in the South African water supply context. The overall objective of the study is to assess the potential role and feasibility of reverse osmosis as a water reclamation process. In order to achieve this objective a number of separate desk, laboratory and pilot plant studies were conducted. It was concluded from the first desk study that a significant potential role exists for reverse osmosis in the South African water economy, mainly for the treatment of industrial effluents and, in the longer term, for the reclamation of water from sewag

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6

Otto, Dietmar Norman. "The effect of forward flushing, with permeate, on gypsum scale formation during reverse osmosis treatment of CaSO4-rich water in the absence of anti-scalant." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95887.

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Thesis (MEng) -- Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: When desalinating brackish water by reverse osmosis (RO) or other techniques, high overall water recoveries are essential to minimize brine production and the associated disposal costs thereof. As the overall water recovery increases, concentrations of sparingly soluble salts (e.g. barium sulphate, calcium sulphate) reach levels above saturation, especially near the membrane surface, drastically increasing the scaling propensity. Antiscalants are typically dosed into the feed water to prevent such scaling during RO desalinati

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7

Gorman, Craig T. "Initial measurements and test system development for evaluation of a novel, hybrid reverse osmosis-electrodialysis process." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/cr/colorado/fullcit?p1428735.

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8

Jeffery, Samantha. "In-Plant and Distribution System Corrosion Control for Reverse Osmosis, Nanofiltration, and Anion Exchange Process Blends." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5951.

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The integration of advanced technologies into existing water treatment facilities (WTFs) can improve and enhance water quality; however, these same modifications or improvements may adversely affect finished water provided to the consumer by public water systems (PWSs) that embrace these advanced technologies. Process modification or improvements may unintentionally impact compliance with the provisions of the United States Environmental Protection Agency's (USEPA's) Safe Drinking Water Act (SDWA). This is especially true with respect to corrosion control, since minor changes in water quality

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9

Al-Obaidi, Mudhar A. A. R. "Modelling, Simulation, and Optimisation of Reverse Osmosis Process with Application in Wastewater Treatment and Food Processing." Thesis, University of Bradford, 2018. http://hdl.handle.net/10454/17345.

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Reverse Osmosis (RO) is a membrane-based separation process applied in several industrial and food processing applications. In this research, performance of RO process is investigated in respect of two applications (a) wastewater treatment (b) concentration fruit juices using model-based techniques. For this purpose, a number of models (both 1 and 2-dimensional steady state and dynamic) for spiral wound RO process are developed based on Solution-Diffusion model and Irreversible Thermodynamic model. The models are validated against actual experimental data reported in the literature before bein

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10

Takaidza, Samkeliso. "The effects of biofouling on a reverse osmosis membrane purification system at Sasol, Sasolburg." Thesis, Vaal University of Technology, 2011. http://hdl.handle.net/10352/452.

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M. Tech. (Biotechnology, Department of Biosciences, Faculty of Applied and Computer Sciences), Vaal University of Technology.<br>Reverse osmosis (RO) membranes are widely used in water purification. The presence of biofilms in water and industrial water purification systems is prevalent. As a result, biofouling which is a biofilm problem causes adverse effects on reverse osmosis process, which include flux decline, shorter membrane lifetime and an increase in energy consumption The effect of biofouling on RO membranes was investigated at a water treatment facility at Sasol, Sasolburg by invest

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11

Roque, Jennifer C. "Evaluation of an On-Line Device to Monitor Scale Formation in a Brackish Water Reverse Osmosis Membrane Process." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5470.

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A modified two-element membrane pressure vessel assembly has been used to monitor process operational changes in a full-scale reverse osmosis (RO) water treatment plant (WTP). This study evaluated the effectiveness of the assembly as an on-line monitoring device intended to detect scale formation conditions when connected to an operating RO process train. This study was implemented to support the requirements of a larger University of Central Florida (UCF) research project ongoing at the city of Sarasota's Public Works and Utilities (City) water treatment facilities located in Sarasota, Florid

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12

Libotean, Dan Mihai. "Modeling the reserve osmosis processes performance using artificial neural networks." Doctoral thesis, Universitat Rovira i Virgili, 2007. http://hdl.handle.net/10803/8555.

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Una de las aplicaciones más importante de los procesos de filtración por membrana es en el área de tratamiento de agua por ultrafiltración, nanofiltración u ósmosis inversa. Entre los problemas más serios encontrados en estos procesos destaca la aparición de los fenómenos de ensuciamiento y envejecimiento de las membranas que limitan la eficacia de la operación tanto en la separación de los solutos, como en el flujo de permeado, afectando también el ciclo de vida de las membranas.<br/>Para reducir el coste de la producción y mejorar la robustez y eficacia de estos procesos es imprescindible di

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13

Shames, Elhashmi Adel. "An investigation into the effect of different types of antiscalant on desalination reverse osmosis (Ro) membrane flux." Thesis, Cape Peninsula University of Technology, 2012. http://hdl.handle.net/20.500.11838/2609.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2012.<br>Recently much research and development has been done into the creation of desalination systems in South Africa, with particular emphasis on the commercialisation of desalination plants that serve local communities. This has been successful - there are currently plants running at Bitlerfontien, Bushmans River Mouth and Robben Island - although membrane fouling and scaling remains a problem associated with membrane desalination, as it does worldwide The aim of this study was to Investigate the performa

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14

Beery, Matan [Verfasser], and Günter [Akademischer Betreuer] Wozny. "Novel Sustainable Concepts in Process Design and Assessment of Seawater Reverse Osmosis Desalination Pre-treatment / Matan Beery. Betreuer: Günter Wozny." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2013. http://d-nb.info/1031993754/34.

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15

Gerber, Daniel Hendrik. "The chemical manipulation of meta-stable brine super-saturated with gypsum: forcing precipitation by overriding the inhibitory effect of antiscalants on crystal formation." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17801.

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Thesis (MScEng)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Desalination, by means of reverse osmosis (RO), in combination with other processes, can produce potable water at high recoveries. Antiscalants are generally used to reduce scaling on equipment surfaces and to improve water recovery during RO by slowing down the precipitation kinetics of sparingly soluble salts in the RO feed, thereby allowing concentration levels in the RO brine at several times the solubility limit of these salts. In addition, a fraction of the concentrate may be recycled back to the feed of the RO-mem

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16

Mai, Zhaohuan. "Procédés membranaires pour le traitement de l'eau, étude et modélisation des interctions entre membranes et composés organiques." Phd thesis, Ecole Centrale Paris, 2013. http://tel.archives-ouvertes.fr/tel-00969165.

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L'objectif de cette thèse est de mettre en évidence le comportement à l'échelle microscopique des composés organiques au cours des procédés de traitement de mélanges complexes, en particulier les procédés membranaires. Pour cela des outils expérimentaux et de modélisation ont été mis au point. Les méthodes de caractérisation expérimentale des mélanges complexes et de l'état de surface des solides utilisés sont entre autres la construction d'isothermes d'adsorption et la mesure des tensions interfaciales par la méthode de la goutte posée. Le cas étudié ici est celui de la filtration de solution

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17

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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18

Fortino, Patrícia Carneiro. "Pós-tratamento de efluente têxtil usando coagulação/floculação combinado com processos de separação por membranas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/61035.

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A indústria têxtil utiliza elevados volumes de água em seus processos, principalmente na etapa de tingimento, em que são utilizadas também quantidades elevadas de corantes e auxiliares têxteis. A presença desses produtos no efluente gera um efeito prejudicial e claramente visível ao ambiente, pois causam alteração nos parâmetros da qualidade da água do corpo receptor. O presente estudo apresenta o pós-tratamento de um efluente têxtil, objetivando o reciclo deste efluente para água de processo de tingimento. Para isso foi utilizada uma combinação de processo físico-químico de coagulação/flocula

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19

Koen, Louis Johannes. "Ultrasonic-time-domain-reflectometry as a real time non-destructive visualisation technique of concentration polarisation and fouling on reverse osmosis membranes." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/52042.

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Thesis (MEng)--Stellenbosch University, 2000.<br>ENGLISH ABSTRACT: Fouling is readily acknowledged as one of the most critical problems limiting the wider application of membranes in liquid separation processes. A better understanding of fouling layer formation and its monitoring is needed in order to improve on existing cleaning techniques. Plant operation can be optimised if fouling can be monitored by noninvasion means either on the plant itself or on an attached monitoring device. The overall scope of this research was to develop a non-destructive, real-time, in situ visualisation t

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20

Kasongo, Wa Kasongo Godwill. "Enhancement of membrane surface characteristics to improve membrane performance and durability in the treatment of municipal MBR effluent." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2695.

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Thesis (Master of Engineering in Chemical Engineering))--Cape Peninsula University of Technology, 2018.<br>Fresh, clean water has always been critical for the world's social development. Supply of water can be reinforced through recycling and reuse; and secondary treatment of municipal wastewater effluent with a membrane bioreactor (MBR) followed by a reverse osmosis (RO) process, has emerged as a crucial treatment process for water reuse. However, fouling of RO membranes in such process is unavoidable. This leads to poor performance, increase in operational cost and degradation of the membran

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21

Steynberg, Leander Duvan. "Characterisation and desalination of typical South African abalone farm effluent sea water." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71601.

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Thesis (MScEng)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Nearly all South African abalone farms function on an intensive pump-ashore, flow-through system. Large volumes of sea water that are pumped ashore flow through abalone or kelp harvesting tanks and finally gravitate back to the ocean. If the effluent from an abalone farm can be desalinated without permanent membrane fouling, then sea water reverse osmosis (SWRO) technology can be integrated effectively with established abalone farms without having to increase the farms’ intake system capacities. Without the need to construct

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22

Nguyen, Duc Trung. "Optimal sizing and system management of water pumping and desalination process supplied with intermittent renewable sources." Electronic Thesis or Diss., Toulouse, INPT, 2013. http://www.theses.fr/2013INPT0030.

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Cette étude s’intéresse à la conception systémique intégrant simultanément les questions de dimensionnement et de gestion optimale de l'énergie. Le système étudié concerne un procédé de pompage intégrant un processus de dessalement d’eaux saumâtres alimenté par des sources de puissance hybrides renouvelable incluant un minimum de stockage électrochimique. Ce cas d’étude appartient à une classe typique de systèmes autonomes alimentés par des sources intermittentes dont profil de puissance a une forme "donnée" : « selon les conditions climatiques (ensoleillement, vent), avec un minimum de stocka

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23

Nguyen, Duc Trung. "Optimal sizing and system management of water pumping and desalination process supplied with intermittent renewable sources." Thesis, Toulouse, INPT, 2013. http://www.theses.fr/2013INPT0030.

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Cette étude s’intéresse à la conception systémique intégrant simultanément les questions de dimensionnement et de gestion optimale de l'énergie. Le système étudié concerne un procédé de pompage intégrant un processus de dessalement d’eaux saumâtres alimenté par des sources de puissance hybrides renouvelable incluant un minimum de stockage électrochimique. Ce cas d’étude appartient à une classe typique de systèmes autonomes alimentés par des sources intermittentes dont profil de puissance a une forme "donnée" : « selon les conditions climatiques (ensoleillement, vent), avec un minimum de stocka

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24

Juholin, P. (Piia). "Hybrid membrane processes in industrial water treatment:separation and recovery of inorganic compounds." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526214412.

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Abstract Industrial wastewaters are complex waters, which can contain a large variety of compounds such as heavy metals and salts as well as nutrients, e.g. nitrogen compounds and phosphorous. Prevention of wastewater formation is not always possible and therefore new more efficient water treatment techniques are needed. Legislation also supports the use of more efficient water treatment techniques, which can lead to better purification results and the recovery of valuable compounds from wastewaters. One technique, which has been of interest, is membrane technology. Membrane technology can sep

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25

Nogueira, Márcio da Costa. "Avaliação da remoção de níquel em solução aquosa pelo processo de osmose inversa." Universidade do Estado do Rio de Janeiro, 2008. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=2694.

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O objetivo deste trabalho foi investigar o desempenho de uma membrana comercial na remoção de um metal pesado (níquel) de efluentes sintéticos, por osmose inversa. Na primeira etapa foi realizada uma comparação com os resultados obtidos com soluções de alimentação contendo sais, como NaCl, NaNO3 e Ni(NO3)2.6 H2O, nas concentrações de 50, 100 e 200 ppm, e nas pressões de 10, 20 e 26 bar. Os resultados mostraram que a influência da concentração e da pressão aplicada ao sistema não afetaram as rejeições de forma significativa. Na segunda etapa, como os parâmetros não influíram significativamente

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26

Dias, Fabio Nunes. "Avaliação de eficácia da sanitização de um sistema de purificação de água. Esterilização de artigos médicos, dissipação residual do óxido de etileno e uso da proteína verde fluorescente (GFP) como inidicador de controle do processo." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/9/9135/tde-21092007-163923/.

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A água exerce papel fundamental nas diferentes fases do processo de fabricação de artigos para saúde (médico-hospitalares, farmacêuticos, e clínicos), exigindo elevado grau de pureza, que certifique a sua inocuidade. Portanto, se faz necessário maior controle dos sistemas de purificação de água e suas etapas de tratamento, onde a formação de biofilmes pode contaminar os artigos para saúde e, consequentemente, causar injúria a pacientes submetidos à aplicação dos mesmos. Embora os artigos médicos sejam esterilizados por óxido de etileno (ETO), seu processo de manufatura deve prever o mínimo acr

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Vargas, Gabriela Marques dos Ramos. "Investigação de alguns parâmetros operacionais e de rejuvenescimento na performance do processo de osmose reversa." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2003. http://hdl.handle.net/10183/3586.

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O presente trabalho está dividido em três etapas distintas: estudo de parâmetros que afetam o processo de rejuvenescimento de membranas de osmose reversa (OR), análise da influência do pH e da temperatura na performance da membrana e estudo do efeito das cloraminas nas membranas de poliamida (PA). Os experimentos foram realizados em uma unidade de OR de bancada que pode operar com dois tipos de módulos: um para membrana plana e outro para membrana em espiral. A performance das membranas foi avaliada medindo-se a retenção e o fluxo de permeado, utilizando-se soluções contendo 2000 ppm de NaCl e

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28

Martella, Lucia. "Removal of pharmaceutical compounds from wastewater secondary effluents by NF/RO membranes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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Recent studies have shown the presence of "new" contaminants in the environment, generally detected at trace concentrations. The presence of such substances, which includes many pharmaceuticals, into soil and surface water is primarily due to the discharge of contaminated wastewater by wastewater treatment plants. The analysis of influents and effluents have pointed out the inefficiency of conventional treatments in removing these micropollutants, enhancing the interest for the implementation of advanced treatments. In particular, this study investigates the removal of 10 pharmaceutical compou

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29

Araujo, Wilson Andalecio de. "Avaliação do processo de osmose inversa para concentração de suco de laranja e simulação da recuperação do etil butirato através da pervaporação com predição de propriedades." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266213.

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Orientadores: Maria Regina Wolf Maciel, Mario Eusebio Torres Alvarez<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-11T16:17:30Z (GMT). No. of bitstreams: 1 Araujo_WilsonAndaleciode_D.pdf: 2993508 bytes, checksum: 29abb03a65a80f6c9835367e0cb49d50 (MD5) Previous issue date: 2008<br>Resumo: Os processos de separação com membranas (PSM) têm sido considerados como alternativa a processos clássicos de separação. Esta é uma área de estudo que apresenta uma forte interdisciplinaridade. Há um crescente interesse nestes

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Chamon, Roberta Petry. "Pós tratamento de lixiviado de aterro industrial pelo processo de osmose reversa : estudo de caso." reponame:Repositório Institucional da UFPR, 2011. http://hdl.handle.net/1884/26302.

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Orientador : Prof. Dr. Urivald Pawlowsky<br>Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduação em Engenharia de Recursos Hídricos e Ambiental. Defesa: Curitiba, 02/03/2011<br>Bibliografia: fls. 212-218<br>Resumo: Uma das grandes dificuldades no tratamento de lixiviado de aterro industrial consiste na remoção dos compostos orgânicos não biodegradáveis, representados, pelos altos valores de Demanda Química de Oxigênio (DQO). Este estudo foi realizado em um Centro de Tratamento o qual recebe, conforme NBR 10004, resíduos industriais de Classe

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Greco, Francesca. "Design of an innovative wind pile for water desalination." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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L’aumento dei consumi e i mutamenti climatici in atto stanno prosciugando le risorse del pianeta, tra cui le riserve di acqua dolce. Tuttavia, un potenziale enorme è rappresentato dagli oceani, che costituiscono il 97% dell’acqua che ricopre il nostro pianeta. La desalinizzazione dell’acqua di mare è un sistema già diffuso ma, ad oggi, la maggior parte degli impianti sono alimentati da fonti di energia non rinnovabili. Il passaggio a una produzione di acqua dolce sostenibile, seppur necessario, è ancora in fase iniziale. La dissalazione con membrane a osmosi inversa prevede il pompaggio di a

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Souza, Mariana Espindola de. "Estudo físico-químico do concentrado proveniente do processo de osmose reversa no tratamento de água para uso industrial." reponame:Repositório Institucional da UFPR, 2017. http://hdl.handle.net/1884/45289.

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Orientadora : Drª. Arislete Dantas Aquino<br>Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Mestrado Profissional em Meio Ambiente Urbano e Industrial, em parceria com o Serviço Nacional de Aprendizagem Industrial e a Universität Stuttgart. Defesa: Curitiba, 28/11/2014<br>Inclui referências : f. 87-95<br>Resumo: Este trabalho teve como objetivo avaliar e caracterizar o resíduo produzido pelo tratamento avançado de um Processo de Separação por Membranas (PSM) proveniente de uma unidade piloto, instalada dentro de uma planta de tratamento de água para a

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Moreira, Ramon Heleno. "Desenvolvimento de um processo de reúso do efluente de refinaria baseado em sistema de osmose reversa combinado com precipitação." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-14032017-141115/.

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O processo de osmose reversa produz um permeado com elevada pureza, pois a membrana é praticamente uma barreira absoluta para partículas sólidas, coloides, íons e orgânicos. No entanto, alguns parâmetros devem ser controlados para proteger a membrana de oxidações por cloro, incrustações por partículas metálicas, compostos orgânicos e por sais concentrados acima ou próximos da supersaturação. Este processo é consolidado em aplicações de dessalinização e desmineralização para geração de água de nobre, porém requer maior avanço conceitual e prático em tratamento de efluentes em função das caracte

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Sixel, Raphael da Rocha. "Osmose inversa aplicada no reúso da água do rio Sarapuí em processos industriais." Universidade do Estado do Rio de Janeiro, 2009. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=2808.

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O objetivo deste estudo foi analisar o desempenho de um sistema de captação e tratamento de água do rio Sarapuí, por meio de uma estação de tratamento composta por um sistema de pré-tratamento convencional, ligado a um sistema de separação por membranas de osmose inversa, no Município de Belford Roxo RJ, instalado para fornecer água de processo a instalações industriais. Foi verificado que a água captada encontra-se em condição bastante degradada e que a unidade de tratamento removeu, em média, 97% do teor dos poluentes presentes na água, enquadrando-a nos parâmetros requeridos pelo processo

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Tomasini, Horacio Reynaldo. "Permeate quality assessment and concentrate recovery in wastewater treatment by membrane processes and reuse for irrigation purposes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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The reuse of treated wastewater in irrigation is fundamental in the management of water resources. The aims of this study were the performance assessment of NF/RO processes for reclamation of MBR-treated wastewater, the concentrate recovery and permeate quality assessment for irrigation. Wastewater processed by MBRs in “ITOB” wastewater treatment plant, located in Izmir, Turkey, was used in NF/RO filtration tests in a pilot-scale plant containing BW30 (RO), NF90 (NF) and NF270 (NF) membranes. Experiments were conducted using single membrane modules (in batch mode and concentrate recirculatio

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Minich, Marek. "Aplikace membránových technologií pro výrobu pitné vody z odtoku z ČOV." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-449332.

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The Master’s Thesis deals with the application of membrane technologies in the production of drinking water from the effluent of a municipal wastewater treatment plant (WWTP). There were two types of pressure-driven membrane processes selected – ultrafiltration and reverse osmosis, to achieve water production of the required quality. For the needs of the diploma thesis, an already existing pilot-scale membrane unit of the ASIO TECH Company l.t.d. was used. There were 44 physical, chemical and microbiological parameters observed to assess the quality of the produced water and also the input wat

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Atiq, Omar. "Feasibility of membrane processes for Volatile Fatty Acids (VFAs) concentration:data elaboration, modelling and design." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Abstract (sommario):

The need for recovery and concentrate a Volatile Fatty Acids (VFAs) effluent resulting from a biological fermentation step, has aimed a feasibility study on pressure-driven membrane separation processing. A previous experimental campaign, carried out at LABIC-DICAM for the NoAW (No-Agricultural Waste) EU project, involving total recirculation and concentration trials on RO and NF modules, was the starting point for subsequent elaboration, modelling, simulation and preliminary design. The presented mass transfer-solution modelling allowed the estimation of both VFAs and Na+ real rejections fo

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Thakur, Bhanu Deb. "Removal of heavy metal Chromium ion by reverse osmosis process." Thesis, 1988. http://localhost:8080/xmlui/handle/12345678/3293.

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Peng, Chih-Ping, and 彭智平. "The optimization of a hydrofluoric acid wastewater recycles reverse osmosis process." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/83587266329327332433.

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碩士<br>國立中興大學<br>環境工程學系所<br>96<br>As a result of the complicated process of the semiconductor industry, there are various types of wastewater and chemical pollution produced during the process. According to the elements and characters of the wastewater, we can divide them into two main groups: acid/alkali-containing wastewater and fluoride-containing wastewater. Very little of the hydrofluoric acid would dissipate during the etching process. Most of them would be drained out along with the cleaning water into the wastewater collecting system. The Effluent Standard on Fluoride (exclude Mixed Ion

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Al-Obaidi, M. A., Chakib Kara-Zaitri, and Iqbal M. Mujtaba. "Modeling of a spiral-wound reverse osmosis process and parameter estimation." 2016. http://hdl.handle.net/10454/8981.

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Yes<br>Reverse osmosis system has been widely used for the separation of organic and non-organic pollutants present in wastewater. The main aim of this study is to develop a one dimensional steady state model based on the three-parameter Spiegler-Kedem methodology using the gPROMS software and validate it by assessing the performance of membrane rejection for the separation data of aqueous solutions of phenol under different concentrations and pressures. Considerations of the variance of pressure, flow rate, solute concentration, solvent and solute fluxes and mass transfer coefficient along th

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Pacheco, Rodriguez Rocio Idalia. "Control of silica scaling phenomena in reverse osmosis systems." Thesis, 2005. http://repositories.lib.utexas.edu/bitstream/handle/2152/1691/pachecorodriguezr48242.pdf.

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42

Sassi, Kamal M., and Iqbal M. Mujtaba. "Optimal design and operation of reverse osmosis desalination process with membrane fouling." 2011. http://hdl.handle.net/10454/6172.

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Al-Obaidi, M. A., and Iqbal M. Mujtaba. "Steady State and Dynamic Modeling of Spiral Wound Wastewater Reverse Osmosis Process." 2016. http://hdl.handle.net/10454/8127.

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Abstract (sommario):

yes<br>Reverse osmosis (RO)is one of the most important technologies used in wastewater treatment plants due to high contaminant rejection and low utilization of energy in comparison to other treatment procedures. For single-component spiral-wound reverse osmosis membrane process, one dimensional steady state and dynamic mathematical models have been developed based on the solution-diffusion model coupled with the concentration polarization mechanism. The model has been validated against reported data for wastewater treatment from literature at steady state conditions. Detailed simulation usin

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Mareth, Brett. "A reverse osmosis treatment process for produced water: optimization, process control, and renewable energy application." 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1755.

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Abstract (sommario):

Fresh water resources in many of the world's oil producing regions, such as western Texas, are scarce, while produced water from oil wells is plentiful, though unfit for most applications due to high salinity and other contamination. Disposing of this water is a great expense to oil producers. This research seeks to advance a technology developed to treat produced water by reverse osmosis and other means to render it suitable for agricultural or industrial use, while simultaneously reducing disposal costs. Pilot testing of the process thus far has demonstrated the technology's capability to pr

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Sagle, Alyson Conner. "PEG hydrogels as anti-fouling coatings for reverse osmosis membranes." 2009. http://hdl.handle.net/2152/18407.

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Abstract (sommario):

Water is becoming increasingly scarce as the demand for fresh water continues to rise. One potential new water resource is purified produced water. Produced water is generated during oil and gas production, and it is often contaminated with emulsified oil, high levels of salt, and particulate matter. Produced water purification using polymer membranes has been investigated, but its implementation is limited by membrane fouling. This study focused on the preparation and application of poly(ethylene glycol) (PEG) hydrogels as fouling-resistant coatings for commercial reverse osmosis (RO) membran

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Huang, Cheng-Yu, and 黃晟祐. "The Optimal Operation and Maintenance Process in Reverse Osmosis System for Water Reclamation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/59865463730371102505.

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Abstract (sommario):

碩士<br>國立臺灣大學<br>環境工程學研究所<br>98<br>The objective of the present study is to monitor the fouling of reverse osmosis (RO) membrane system in terms of economic analysis by optimization of pretreatment, operation flux rate and frequency of membrane cleaning, and also to achieve the RO permeate water quality to match the Singapore NEWater quality standards. Two types of membranes processes microfiltration (MF) and ultrafiltration (UF) were used for pretreatment before RO filtration at various operating fluxes. The performances of MF and UF processes were monitored in terms of flux recovery and the o

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Ralengole, Galebone. "An application of reverse osmosis process on effluent treatment for the rubber industry." Thesis, 2009. http://hdl.handle.net/10352/290.

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Abstract (sommario):

M. Tech., (Chemical Engineering, Department of Chemical Engineering, Faculty of Engineering and Technology Vaal University of Technology|<br>The methods used to remove potassium sulphate (K2S04) and other impurities contained within Karbochem finishing plant effluent were investigated. Reverse osmosis was explored for this application. The study was conducted in two steps. The first step focuses mainly on the effluent treatment using BW30 flatsheet as well as BW30-2540 spiral-wound reverse osmosis membranes for the rejection of potassium and sulphate ions. The membranes were supplied by

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48

Wild, Peter Martin. "Development, optimization and implementation of the design for a centrifugal reverse-osmosis desalination system." Thesis, 1994. https://dspace.library.uvic.ca//handle/1828/9471.

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Abstract (sommario):

A new method of sea water desalination, Centrifugal Reverse-Osmosis (CRO), is developed from concept to patented design and functional prototype of capacity 11,355 litres of fresh water per day. CRO is shown to have significant benefits relative to the leading existing desalination technology, conventional reverse-osmosis. These benefits include: lower energy consumption, reduced initial and replacement membrane costs, lower noise levels and improved reliability. CRO is projected to show increasing cost efficiency as plant capacity increases. For a relatively large CRO plant, 65lm³ fresh

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Barello, M., D. Manca, Rajnikant Patel, and Iqbal M. Mujtaba. "Operation and modeling of RO desalination process in batch mode." 2014. http://hdl.handle.net/10454/10603.

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Abstract (sommario):

No<br>In this work, a reverse osmosis (RO) desalination process operating under batch mode is considered experimentally. The effect of operating parameters, such as pressure and feed salinity on the permeate quantity and salinity is evaluated. In addition, the water permeability constant, Kw, which is one of the main parameters that affect the optimal design and operation of RO processes is evaluated as a function of changing feed salinity and pressure using the experimental data and two literature models. A strong pressure dependence of the water permeability constant is observed in line with

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50

Al-Obaidi, M. A., Chakib Kara-Zaitri, and Iqbal M. Mujtaba. "Development and Validation of N-nitrosamine Rejection Mathematical Model Using a Spiral-wound Reverse Osmosis Process." 2016. http://hdl.handle.net/10454/10380.

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Abstract (sommario):

yes<br>In this paper, a one-dimensional mathematical model based on coupled differential and algebraic equations has been developed for analysing the separation mechanism of a N-nitrosamine in a spiral-wound reverse osmosis process. The model is based on Spiegler and Kedem’s work on mass transport and Darcy’s law and concentration polarization to analyse the pressure drop and mass transfer coefficient in the module feed channel respectively. The model is built using the gPROMS software suite and validated using N-nitrosamine rejection experimental data from the literature, obtained by usi

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