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Tesi sul tema "Bioreactors"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 25 luglio 2025

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1

Millward, Huw Richard. "Novel membrane bioreactors." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317837.

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2

Daly, Chris D. "Artificial arteries and bioreactors /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19028.pdf.

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3

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

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Abstract (sommario):
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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4

Kadzinga, Fadzai. "Venturi aeration of bioreactors." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/13675.

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Abstract (sommario):
Low solubility of oxygen has resulted in high bioreactor energy requirements in order to supply sufficient oxygen to aerobic bioprocesses. It is desirable to reduce energy consumption in bioreactors to benefit environmental sustainability as well as economic feasibility. This is particularly important with the resurgence of interest in bio-based commodity products. Some research has suggested that venturi aeration of bioreactors will reduce energy consumption by eliminating the need for air compression, while at the same time maintaining or improving oxygen transfer rates. On the other hand, t
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5

Mamo, Julian. "Assessment and optimisation of the operation of integrated membrane system for wastewater reclamation." Doctoral thesis, Universitat de Girona, 2018. http://hdl.handle.net/10803/667844.

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Abstract (sommario):
The combination of two membrane technologies coupled together in series has become a standard technology when it comes to producing reclaimed water of high quality for potable reclamation or industrial applications. This combination of two membrane processes is referred to as integrated membrane systems (IMS). Despite the widespread experience gained utilizing such a process technology around the world, there are a number of aspects of the process technology which require further investigation including the fate of compounds of emerging concern (CEC), the control of N-Nitrosodimethylamine (NDM
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6

McAdam, Ewan J. "Denitrification using immersed membrane bioreactors." Thesis, Cranfield University, 2008. http://dspace.lib.cranfield.ac.uk/handle/1826/6281.

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Abstract (sommario):
Nitrate is practically ubiquitous in waters abstracted for municipal potable water production in Europe due to decades of intensive agricultural practice. Ion exchange is principally selected to target abstracted waters with elevated nitrate concentrations. However, the cost associated with disposal of the waste stream has re-ignited interest in destructive rather concentrative technologies. This thesis explores the potential of membrane bioreactor (MBR) technology for the removal of nitrate from potable water. Two configurations are considered: an MBR to replace ion-exchange completely; and a
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7

Ruiz, Medina Tarik. "Plant cell bioreactors for peptide production." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670804.

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La producció de proteïnes recombinants en plantes representa una oportunitat per a la seva obtenció i utilització comercial. L'objectiu principal d'aquesta tesi industrial ha estat el desenvolupament de sistemes vegetals de producció de proteïnes, eficients i competitius econòmicament, amb possibilitats de portar-les al mercat. Per fer-ho hem explorat dos sistemes: els cultius cel·lulars de Daucus carota i les fulles de Nicotiana benthamiana, cadascun d'ells amb els seus avantatges i limitacions. Com a prova de concepte, ambdós sistemes van ser utilitzats per a la producció d'"insulin-like gro
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8

Peron, Yannick L. "Mixing of immobilised cells in bioreactors." Thesis, University of Huddersfield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286090.

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9

Shu, Chin-Hang. "Multiphase bioreactors for recombinant yeast fermentation /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487780865408922.

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10

Rokstad, Anne Mari Aukan. "Alginate capsules as bioreactors for cell therapy." Doctoral thesis, Norwegian University of Science and Technology, Department of Cancer Research and Molecular Medicine, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1535.

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11

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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Abstract (sommario):
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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12

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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Abstract (sommario):
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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13

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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Abstract (sommario):
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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14

Barghi, Hamidreza. "Functionalization of Synthetic Polymers for Membrane Bioreactors." Doctoral thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-3688.

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Abstract (sommario):
Membrane bioreactors (MBRs) show great promise for productivity improvement and energy conservation in conventional bioprocesses for wastewater reclamation. In order to attain high productivity in a bioprocess, it is crucial to retain the microorganisms in the bioreactors by preventing wash out. This enables recycling of the microorganisms, and is consequently saving energy. The main feature of MBRs is their permeable membranes, acting as a limitative interface between the medium and the microorganisms. Permeation of nutrients and metabolites through the membranes is thus dependent on the memb
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15

Le, Clech Pierre. "Process configurations and fouling in membrane bioreactors." Thesis, Cranfield University, 2002. http://dspace.lib.cranfield.ac.uk/handle/1826/11336.

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Abstract (sommario):
MBR process consists of a suspended growth biological reactor combined with a membrane unit. The widespread of this system for waste water treatment is contained by membrane fouling, which is strongly influenced by three factors: biomass characteristics, operating conditions and membrane characteristics. Fouling control techniques mainly include low-flux operation (sub-critical flux operation) and/or high-shear slug flow aeration in submerged. configuration. Based on the concept of the critical flux (Jo), the flux-step method has been developed to more fully characterise transmembrane pressure
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16

Chen, Chien-Lin. "Low temperature impacts on intermittent sand bioreactors." Connect to this title online, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1054656332.

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Abstract (sommario):
Thesis (Ph. D.)--Ohio State University, 2003.<br>Title from first page of PDF file. Document formatted into pages; contains xiv, 113 p.; also includes graphics Includes bibliographical references (p. 84-87). Available online via OhioLINK's ETD Center
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17

Shearer, Holly. "Hollow fibre bioreactors for bone tissue engineering." Thesis, University of Bath, 2007. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.441441.

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18

Detzel, Christopher James. "Simulation and use of a centrifugal bioreactor for mammalian cell and tissue culture." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Dissertations/Summer2009/c_detzel_061709.pdf.

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Thesis (Ph. D.)--Washington State University, August 2009.<br>Title from PDF title page (viewed on Aug. 3, 2009). "School of Chemical Engineering and Bioengineering." Includes bibliographical references.
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19

Li, Anjie. "Determining factors for aerobic sludge granulation in bioreactors mechanism analysis, mathematical modeling and experimental verification /." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B42841689.

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20

Mezohegyi, Gergo. "Catalytic azo dye reduction in advanced anaerobic bioreactors." Doctoral thesis, Universitat Rovira i Virgili, 2010. http://hdl.handle.net/10803/8593.

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Abstract (sommario):
En un reactor anaeróbico de lecho empacado y de flujo ascendente con carbón activado (AC) biológico se obtuvieron altas velocidades de conversión del colorante azoico Acid Orange 7 a tiempos espaciales muy cortos, hasta 99% en 2.0 min. Tanto el área superficial específica como la conductividad electrónica del AC contribuyeron a las mayores velocidades de reducción. La agitación en el lecho de carbón produjo un incremento de la bioconversión del colorante. Se estableció un modelo cinético de decoloración que implica catálisis heterogénea y bioreducción. La biodegradabilidad anaeróbica de un col
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21

Kadic, Enes. "Survey of gas-liquid mass transfer in bioreactors." [Ames, Iowa : Iowa State University], 2010. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1476312.

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22

Tan, Rung-Kai [Verfasser]. "Mixing time in shaking bioreactors / Rung-Kai Tan." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1025511972/34.

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23

Nock, Volker Michael. "Control and measurement of oxygen in microfluidic bioreactors." Thesis, University of Canterbury. Electrical and Computer Engineering, 2009. http://hdl.handle.net/10092/2574.

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Abstract (sommario):
Bioartificial Liver (BAL) is a term for medical devices designed to replace natural liver functions. The idea behind the use of artificial livers is to either externally support an injured liver to recovery or bridge a patient with a failing liver to transplantation. Central to all BAL systems is a bioreactor for culturing liver cells. The main function of this reactor is to provide a cell adhesion matrix and supply the necessary nutrient solution. A high cellular oxygen uptake rate combined with low solubility in aqueous media makes oxygen supply to the liver cells the most constraining facto
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24

Ekevall, Elizabeth. "Development of membrane bioreactors for liver failure therapy." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248546.

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25

Pimentel, Guilherme Araujo. "Nonlinear Modeling, Identification and Control of Membrane Bioreactors." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS219/document.

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Abstract (sommario):
Cette thèse propose un modèle dynamique d'un bioréacteur à membrane submergée (sMBR) comprenant les comportements physiques et biologiques du processus. La filtration (aspect physique) est un modèle de résistances en série composé de la résistance réversible (liée au processus de formation d'un gâteau qui peut être enlevé par lavage de l'air) et de la résistance à colmatage irréversible. La fonction biologique est mise en œuvre par l'extension du modèle de chemostat simple avec un mécanisme de filtration.L'analyse du modèle comprend : l'analyse asymptotique, l'observabilité, la contrôlabilité
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26

Lindell, Per Ingemar. "Dynamic operation of mammalian cell fed-batch bioreactors." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/16509.

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27

Meier, Steven J. (Steven John) 1969. "Modeling sparging related death in animal cell bioreactors." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/47520.

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28

Weheliye, W. H. "Mixing, velocity and turbulence characteristics of shaken bioreactors." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1415489/.

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The thesis describes an experimental investigation of the flow in a shaken bioreactor of cylindrical geometry with a flat bottom. Several reactor designs can be distinguished that attain mixing in different ways: oscillatory flow mixers (OFM), static mixers, stirred vessels and shaken bioreactors. Shaken bioreactors are often small-scale mixers (microwells) employed in the early stage of bioprocess development (i.e. microbial fermentation, bioconversion and product recovery techniques), before the developed process is implemented in a large-scale industrial stirred tank. However, despite their
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29

Akinbomi, Julius. "Fermentative hydrogen and methane productions using membrane bioreactors." Doctoral thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-671.

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Abstract (sommario):
The role of energy as a stimulant for economic growth and environmental sustainabilityof any nation has made the focus on green fuels, including fermentative hydrogen (bioH2) andmethane (bioCH4), to be a priority for the World’s policy makers. Nigeria, as the most populousAfrican country, with worsening energy crisis, can benefit from the introduction of the bioH2 andbioCH4 technologies into the country’s energy mix, since such technologies have the potential ofgenerating energy from organic wastes such as fruit waste.Fruit waste was studied in detail in this work because of its great economic
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30

Santos, Ana. "Micropollutants removal and tecnological development of membrane bioreactors." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/8350.

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The increasing worldwide contamination of aquatic environment with pollutants introduced by anthropogenic sources has become of great concern. Although present at low concentration, many of these pollutants have considerable long-term impacts on the ecosystem, such that extremely challenging legislative limits on their concentration in effluents are being proposed. This has led to the examination of membrane bioreactor (MBR) technology for wastewater treatment, since it offers the best and most consistent treated water quality of all biotreatment processes. However, both a review of the litera
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31

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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32

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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Abstract (sommario):
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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33

Conroy, Kristen Monica. "Treating High Salt Content Wastewater with Sand Bioreactors." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu149796844505562.

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34

Wang, Lei. "Tetrachloroethene (PCE) and trichloroethene (TCE) biogradation with bioreactors /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3036865.

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35

Lee, Sally Yin Chun. "Biological removal of natural estrogens in membrane bioreactors /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202009%20LEE.

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36

McClure, Dale David. "Modelling Bubble Column Bioreactors Using Computational Fluid Dynamics." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/12058.

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Abstract (sommario):
Bubble columns are widely used in the bio-processing industry to perform large scale, aerobic fermentations. For this reason, there is a clear interest in optimising both the design and operation of such reactors. One cost-effective approach is the development of a Computational Fluid Dynamics (CFD) model of the process; the major advantage of this methodology being that it provides detailed information about the flow patterns within the column, knowledge which is difficult to experimentally obtain at an industrial scale. Such data are of particular value as it has been conjectured that poor d
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37

Reid, Elizabeth. "Salinity shocking and fouling amelioration in membrane bioreactors." Thesis, Cranfield University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.653080.

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38

Chan, Leon Cong Zhi. "Miniaturisation of pH holographic sensors for nano-bioreactors." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/268167.

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Monitoring and controlling pH is of utmost importance in bioprocessing as it directly affects product yield and quality. Multiplexed experiments can be performed in nanobioreactors for optimisation of yield and cell heterogeneity in a relatively quick and inexpensive manner. In this thesis, a pH holographic sensor (holosensor) is miniaturised to 3.11 nL in volume and integrated into a PDMS-glass microfluidic chip for monitoring the growth of Lactobacillus casei Shirota. Although other established methods for monitoring cell cultures can be utilised, miniaturised holosensors enable real-time an
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39

Liew, Emily Wan Teng. "Modeling and control of non-ideally mixed bioreactors." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/1433.

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Abstract (sommario):
Mixing plays a substantial role in determining the overall performance of a bioreactor. Well mixing in bioreactor, especially for ethanolic fermentation process is important for the homogenization of miscible and immiscible liquids, gas dispersion and suspension of solid particles. Improper mixing will eventually affect the biological and kinetics reactions occurring in the bioreactor and subsequently deteriorate the bioreactor performance. Currently, most modeling and control applications of bioreactors have been devoted to ideally mixed assumption, for simplicity. This is not realistic i
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40

Morello, Luca. "Sustainable landfilling: hybrid bioreactors and final storage quality." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3424792.

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Abstract (sommario):
Modern landfilling constitutes an unavoidable final step in solid waste management. It aims to close the “Material Cycle” bringing elements back to the non-mobile state they were in before their extraction. At the same time, the application of Sustainability Principle to landfills prescribes to guarantee environmental protection and health safety, ensuring that the disposed waste will be chemically and biochemically stable within a reasonable amount of time. A “Sustainable Landfill” must combine these two fundamental purposes, balancing the efforts to obtain a “sustainable closure of material
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41

Dalmau, Figueras Montserrat. "Integrated operation of membrane bioreactors: simulation and experimental studies." Doctoral thesis, Universitat de Girona, 2014. http://hdl.handle.net/10803/284740.

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Abstract (sommario):
Membrane bioreactors (MBR) are a combination of common bioreactors and membrane filtration units for biomass retention, presenting unique advantages like high effluent quality and a smaller footprint than the one by conventional wastewater treatment plants. However, fouling and its associated costs are the main drawbacks related to this technology. This thesis presents a step towards the integrated operation of MBRs through experimental and model-based studies. Interactions between the biological (nutrient removal and sludge characteristics) and physical (hydrodynamics and filtration) processe
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42

OLIVEIRA, TAIS L. de. "Desenvolvimento de processo de fermentacao em biorreator para producao de prolactina humana secretada no espaco periplasmico de Escherichia coli." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11767.

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Made available in DSpace on 2014-10-09T12:55:35Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:04:57Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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43

Zhang, Kai. "Understanding biofouling in membrane bioreactors treating synthetic paper wastewater." Cincinnati, Ohio : University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1109079842.

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44

Osman, Suhana Hanum. "The degradation of refractory mineral oil residues using bioreactors." Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/26875.

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Abstract (sommario):
This thesis is concerned with the biodegradation of oily sludges typically found at refinery sites as waste residues from the refining of mineral oil. Currently these type of wastes represent significant environmental risk. Current technology that addresses containment during treatment to regulate the release of volatile organic carbons and reduction of the polynuclear aromatic hydrocarbons in the sludge, is incineration. Incineration is a costly option and this research has shown that the same treatment standards as incineration is achievable through bioreactor treatment with the correct proc
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45

Starke, Christina. "Reducing operational costs in membrane bioreactors using slug bubbles." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/51914.

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Abstract (sommario):
Membrane bioreactors (MBRs) are commonly used in wastewater treatment processes. In fact, the demand is expected to increase with more than double digit growth annually over the next decade [5]. However, operational costs of MBRs are still higher compared to operational costs of conventional treatment plants due to the additional aeration and pumping required in MBRs. This study examines the feasibility of using excess air that was used to clean the membrane for water conveyance (known as airlift pump), for a minimized energy use in MBR processes. In order to meet the objective, prototypes of
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46

Krommenhoek, Erik Eduard. "Integrated sensor array for on-line monitoring micro bioreactors." Enschede : University of Twente [Host], 2007. http://doc.utwente.nl/58086.

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47

Machado, Araujo Sonia Maria. "The application of model-based observer control to bioreactors." Thesis, University of Surrey, 1998. http://epubs.surrey.ac.uk/770/.

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48

Gerlach, Jorg C. "Culture model for hepatocytes in hybrid liver support bioreactors." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248963.

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49

Stronach, S. M. "Anaerobic treatment of industrial wastewaters in high rate bioreactors." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/46682.

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50

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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