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Dissertations / Theses on the topic 'Extracellular polymeric.substances'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Ren, Baisha. "Understanding Extracellular Polymeric Substances in Nitrifying Moving Bed Biofilm Reactor." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32879.

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Water and wastewater treatment solutions incorporating biofilm systems are becoming increasingly popular due to more stringent regulations pertaining to drinking water and wastewater effluent discharge in Canada and in other parts of the world. As a major component of biofilm, extracellular polymeric substances (EPS) have been considered as an important factor affecting the physical and chemical properties of biofilm. Further, the selected method of EPS extraction and the methods of detecting the composition of the EPS have shown to affect the results of EPS measurements. In this research, pr

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2

Lubarsky, Helen V. "The impact of microbial extracellular polymeric substances on sediment stability." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2099.

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The main objective of this thesis is to investigate the impact of microbial extracellular polymeric substances (EPS) on sediment stability and the related factors which influence “biogenic stabilisation” as a basis to the prediction of sediment erosion and transport. The ability to make direct and sensitive measurements of the physical properties of the biofilm is a critical demand to further understanding of the overall biostabilisation processes. Therefore, attention has been focused on developing a new technique, Magnetic Particle Induction (MagPI) for measuring the adhesive properties of t

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3

Akbar, Sirwan. "Gram negative bacterial biofilm formation and characterisation of extracellular polymeric substances." Thesis, University of Huddersfield, 2016. http://eprints.hud.ac.uk/id/eprint/30236/.

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Gram negative bacteria such as Stenotrophomonas maltophilia, Pseudomonas aeruginosa and Citrobacter freundii are often associated with multiple drug resistance and the generation of nosocomial infections. In the current study several clinical strains of theses bacteria (Ps 1, Ps 3, Ps 5, St 18, St 51, St 53 and C. freundii) and two culture collection strains Ps 10421 and St 9203 were evaluated for their ability to generate biofilms and the characteristics of the associated extracellular polysaccharides they produced. The ability of these strains to develop biofilms on a range of media and with

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4

Pen, Yu. "Conformational and mechanical properties of bacterial mycolic acid and extracellular polymeric substances." Thesis, University of Sheffield, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566700.

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Rhodococcus has been used in bioremediation because of its low eco- toxicity, high tolerance to harsh environments, and ability to be cultivated in mixed microbial consortia with certain contaminants as its nutrients. Excretion of extracellular polymeric substances (EPS) allows Rhodococcus to trap and to effectively degrade contaminants. Mycolic acid (MA) which covers the cell wall provides Rhodococcus with a hydrophobic cell surface to contact hydrocarbon contaminant droplets. This work concerns the influence of the conformational change in MA and rhodococcal EPS on their mechanical propertie

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5

Rode, Alexander. "Isolierung und Charakterisierung von bakteriellen extrazellulären polymeren Substanzen aus Biofilmen / Isolation and characterization of bacterial extracellular polymeric substances from biofilms." Gerhard-Mercator-Universitaet Duisburg, 2004. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-09132004-102114/.

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Microorganisms in biofilms are kept together by extracellular polymeric substances (EPS). The EPS are key molecules for the structure, function and organization of biofilms. Chemical and / or physical isolation methods are being used for the quantitative separation of EPS from biofilms. The yield of EPS depends on the method of isolation. Four different methods of EPS isolation were used in this work (separation by stirring and centrifugation, use of a cation exchange resin, extraction with formaldehyde and extraction with formaldehyde and NaOH) on pure culture biofilms of Pseudomonas aerugino

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6

Jimoh, Taobat Adekilekun. "Water quality, biomass and extracellular polymeric substances in an integrated algae pond system." Thesis, Rhodes University, 2018. http://hdl.handle.net/10962/57307.

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Integrated algae pond systems (IAPS) combine the use of anaerobic and aerobic bioprocesses to effect wastewater treatment. Although, IAPS as a technology process offers many advantages including efficient and simultaneous N and P removal, no requirement for additional chemicals, O2 generation, CO2 mitigation, and a biomass with potential for valorization, a lack of technological advancement and the need for large land area, has limited the reach of this technology at industrial scale. In mitigation, peroxonation was introduced as a tertiary treatment unit and its effect on COD and TSS of IAPS

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7

Bura, Renata. "Properties and occurrence of lipids in extracellular polymeric substances (EPS) of activated sludge flocs." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0023/MQ50331.pdf.

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8

Haslett, Norman G. "Factors influencing the production and nature of surface-associated Pseudomonas fragi extracellular polymeric substances (EPS)." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295391.

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9

Leung, Pui-chi, and 梁佩芝. "Effects of extracellular polymeric substances on the bioflocculation and sedimendation of diatom blooms and activated sludge." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B29512153.

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10

Milner, Clare. "The possible role of the extracellular polymeric substances (EPS) of Staphylococcus epidermidis in biomaterial-centered infections." Thesis, University of Aberdeen, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320235.

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The aim of this project was to determine the possible role of the extracellular polymeric substances (EPS) of <I>Staphylococcus epidermidis</I> in biomaterial-centered infections. The first part of the project involved the production, isolation, and characterisation of <I>S.epidermidis</I> EPS. A novel method for the isolation of EPS from complex medium was developed which was able to eliminate the problems associated with contamination of bacterial EPS by medium components. Using this method, samples of EPS were obtained from <I>S.epidermidis</I> ATCC 35984 and clinical isolates. In the secon

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11

Taylor, Joe D. "Response of microbial communities in estuarine littoral zones to changes in environment and extracellular polymeric substances." Thesis, University of Essex, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.537947.

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12

XUE, ZHENG. "Role of Extracellular Polymeric Substances (EPS) on Biofilm Disinfection in a Model Drinking Water Distribution System." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1349714910.

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13

Zhang, Ruiyong [Verfasser], and Wolfgang [Akademischer Betreuer] Sand. "Biofilm formation and extracellular polymeric substances of acidophilic metal/sulfur-oxidizing archaea / Ruiyong Zhang. Betreuer: Wolfgang Sand." Duisburg, 2016. http://d-nb.info/108189962X/34.

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14

Li, Qian [Verfasser], and Wolfgang [Akademischer Betreuer] Sand. "Extracellular polymeric substances involved in adhesion and biofilm formation by Sulfobacillus thermosulfidooxidans / Qian Li ; Betreuer: Wolfgang Sand." Duisburg, 2017. http://d-nb.info/1143518675/34.

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15

Henry, Victoria Azula. "Identification of functional group characteristics and physicochemical properties of atrazine degrading Pseudomonas sp. strain ADP biofilm." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/5947.

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Microbial biofilms are significant in a variety of settings including the human microbiome, infectious disease, industrial processes, and environmental remediation. Due to the ubiquitous nature of biofilms, there is a great interest in understanding cellular activities within the biofilm matrix. Biofilm cells are able to better withstand environmental stress, experience increased horizontal gene transfer, and live longer. The purpose of this research is to grow Pseudomonas sp. strain ADP as a biofilm and examine the chemical and physical characteristics the microbe undertakes in a sticky extra

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16

Windhues, Thorsten. "Physikalisch-chemische Charakterisierung von extrazellulären polymeren Substanzen und deren Alginatkomponenten mit Streulichtmethoden - Physico-chemical characterization of extracellular polymeric substances and their alginate components with light scattering techniques." Gerhard-Mercator-Universitaet Duisburg, 2002. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-11192002-174358/.

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Algal alginates are of great importance for industrial applications. Since their properties depend on the kind of algae and the time of harvesting, supply problems caused price fluctuations. Hence, current research focuses on alternative alginate sources. Back in the 60s, exopolysaccharides similar to algal alginates were found. They were produced by mucoid Pseudomonas aeruginosa strains which embed themselves in a slime matrix containing bacterial alginates. The focus of this thesis was a comparisons of the physico-chemical properties of bacterial and algal alginates. The main results of the

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17

Hessler, Christopher Mark. "The Influence of Capsular Extracellular Polymeric Substances on the Toxicological Interaction Between Titanium Dioxide Nanoparticles and Planktonic Bacteria." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1321645743.

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18

Salisbury, Stephanie Kara. "Dynamics and Composition of the Extracellular Polymeric Substances Produced by Benthic Microalgae: An in Situ 13C and 15N Approach." W&M ScholarWorks, 2011. https://scholarworks.wm.edu/etd/1539617901.

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The land-‐ocean margin is characterized by a shallow water column, which allows light to reach the benthos and supports a diverse community of benthic autotrophs. One group of benthic autotrophs, consisting of benthic diatoms, cyanobacteria and other photosynthetic microorganisms living near the sediment surface (i.e., benthic microalgae) accounts for a substantial amount of this primary production. Benthic microalgae are also tightly coupled to carbon and nutrient cycling processes carried out by the sediment bacterial community. Benthic microalgae exude complex biopolymers, called extracell

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19

Brian-Jaisson, Florence. "Identification et caractérisation des exopolymères de biofilms de bactéries marines." Electronic Thesis or Diss., Toulon, 2014. http://www.theses.fr/2014TOUL0003.

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Dans l’environnement marin, les surfaces artificielles sont rapidement colonisées par des bactéries qui s’organisent en communautés appelées biofilms, s’entourant d’une matrice de substances polymériques extracellulaires (EPS). La formation d’un biofilm est une étape critique du processus nommé biofouling, c’est-à-dire l’accumulation de micro- et de macro-organismes sur une surface immergée, pouvant conduire à des conséquences néfastes dans le secteur marin. Dans cette étude, il s’agit d’identifier des souches bactériennes isolées de supports immergés en Mer Méditerranée et de les caractériser

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20

Park, Chul. "Extracellular Polymeric Substances in Activated Sludge Flocs: Extraction, Identification, and Investigation of Their Link with Cations and Fate in Sludge Digestion." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/28504.

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Extracellular polymeric substances (EPS) in activated sludge are known to account for the flocculent nature of activated sludge. Extensive studies over the last few decades have attempted to extract and characterize activated sludge EPS, but a lack of agreement between studies has also been quite common. The molecular makeup of EPS has, however, remained nearly unexplored, leaving their identity, function, and fate over various stages in the activated sludge system mainly unknown. In spite of their critical involvement in bioflocculation and long history of related research, our understanding

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21

Brian-Jaisson, Florence. "Identification et caractérisation des exopolymères de biofilms de bactéries marines." Phd thesis, Toulon, 2014. http://tel.archives-ouvertes.fr/tel-01058255.

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Dans l'environnement marin, les surfaces artificielles sont rapidement colonisées par des bactéries qui s'organisent en communautés appelées biofilms, s'entourant d'une matrice de substances polymériques extracellulaires (EPS). La formation d'un biofilm est une étape critique du processus nommé biofouling, c'est-à-dire l'accumulation de micro- et de macro-organismes sur une surface immergée, pouvant conduire à des conséquences néfastes dans le secteur marin. Dans cette étude, il s'agit d'identifier des souches bactériennes isolées de supports immergés en Mer Méditerranée et de les caractériser

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22

Wang, Zhikang. "Influence of Biofilm on Disinfection Byproducts Formation and Decay in a Simulated Water Distribution System." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1372343403.

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23

Michalowski, Witold Dariusz [Verfasser], Hans-Curt [Akademischer Betreuer] Flemming, and Ulrich [Akademischer Betreuer] Szewzyk. "Composition, dynamics and function of extracellular polymeric substances in drinking-water biofilms / Witold Dariusz Michalowski. Gutachter: Ulrich Szewzyk. Betreuer: Hans-Curt Flemming." Duisburg, 2012. http://d-nb.info/1028324421/34.

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24

Teubner, Natascha Caroline [Verfasser], and Wolfgang [Akademischer Betreuer] Sand. "Functional components in the EPS -extracellular polymeric substances- of the iron-oxidizing biofilm forming Acidithiobacillus species / Natascha Caroline Teubner ; Betreuer: Wolfgang Sand." Duisburg, 2018. http://d-nb.info/115849601X/34.

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25

Teubner, Natascha [Verfasser], and Wolfgang [Akademischer Betreuer] Sand. "Functional components in the EPS -extracellular polymeric substances- of the iron-oxidizing biofilm forming Acidithiobacillus species / Natascha Caroline Teubner ; Betreuer: Wolfgang Sand." Duisburg, 2018. http://d-nb.info/115849601X/34.

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26

Stuchlíková, Olga. "Antimikrobiální aktivita uhlíkatého plniva." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-217047.

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Diplomová práce se zabývá vlivem uhlíkatého plniva na životaschopnost a produkci extracelulárních látek vybrané bakterie Bacillus subtilis (CCM 1999) a kvasinky Yarrowia lipolytica (CCY 29-26-52). Antimikrobiální aktivita těchto částic, přítomných v kultivačním mediu, byla sledována pomocí následujících parametrů: růst daného mikroorganismu, produkce extracelulárních proteinů a v poslední řadě byla monitorována produkce extracelulárních polymerních substancí, které mají úzkou souvislost s tvorbou biofilmu. Suspenze materiálů (0,135 mg/mL) byly připraveny ve dvou rozdílných kultivačních mediích

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27

Andersson, Sofia. "Characterization of Bacterial Biofilms for Wastewater Treatment." Doctoral thesis, KTH, Miljömikrobiologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10118.

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Research performed at the Division of Environmental Microbiology has over the last years resulted in the isolation of possible bacterial key-organisms with efficient nutrient removal properties (Comamonas denitrificans, Brachymonas denitrificans, Aeromonas hydrophila). Effective use of these organisms for enhanced nutrient removal in wastewater treatment applications requires the strains to be retained, to proliferate and to maintain biological activity within theprocess. This can be achieved by immobilization of the organisms using an appropriate system.Two putative immobilization systems, ag

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Roberts, Zoe Elizabeth. "The lipid biomarker distribution of cold seep mats and the possible influence of extracellular polymeric substances on calcium carbonate formation associated with the anaerobic oxidation of methane." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520212.

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29

Unal, Eda. "Investigation Of Magnesium Ions Effect On Sludge Properties In Phosphorus Deficient Bioreactors." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612620/index.pdf.

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The activated sludge process efficiency depends on separation of microbial cells from treated wastewater. Separation can fail due to a number of problems. One of these problems is sludge bulking which is non-settling situation of biomass. Former studies showed that phosphorus deficiency caused filamentous sludge bulking with increasing magnesium ion concentrations. The main objectives of this study are to find out the effect of magnesium ions on sludge properties in phosphorus deficient medium and to determine if there is any bulking. Three different concentrations of magnesium (0.5, 5, 15 meq

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30

Avella, Vasquez Ana Catalina. "Substances polymériques extracellulaires dans les procédés de traitement des eaux usées." Thesis, Vandoeuvre-les-Nancy, INPL, 2010. http://www.theses.fr/2010INPL029N/document.

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L’objectif de ce travail est d’une part (i) étudier le comportement de la biomasse notamment la production d’EPS en présence des composés pharmaceutiques (un agent anticancéreux et cinq antibiotiques); et d’autre part, (ii) étudier les EPS dans le contexte de décantation des boues en présence d’agents fongiques et en situations réelles dans des stations d’épuration. L’étude en présence de l’agent anticancéreux a été réalisée dans des bioréacteurs à membranes. La présence de l’agent anticancéreux a induit l’augmentation de la production d’EPS agissant comme un mécanisme de protection microbienn

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Zethof, Jeroen H. T. [Verfasser], Karsten [Gutachter] Kalbitz, Karsten [Akademischer Betreuer] Kalbitz, Georg [Gutachter] Guggenberger, and M. Estela [Gutachter] Nadal-Romero. "The role of extracellular polymeric substances from microbes in soil aggregate stabilization in semiarid grasslands / Jeroen H.T. Zethof ; Gutachter: Karsten Kalbitz, Georg Guggenberger, M. Estela Nadal-Romero ; Betreuer: Karsten Kalbitz." Dresden : Technische Universität Dresden, 2021. http://d-nb.info/1237320054/34.

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32

Turtin, Ipek. "Investigation Of Activated Sludge Bioflocculation: Influence Of Magnesium Ions." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606605/index.pdf.

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Activated sludge systems are the most widely used biological wastewater treatment processes all over the world. The main working principles of an activated sludge system are the oxidation of biologically degradable wastes by microorganisms and the subsequent separation of the newly formed biomass from the treated effluent. Separation by settling is the most troublesome stage of an activated sludge process. A decrease in the efficiency of the separation of microbial biomass from the treated effluent causes a decrease in the overall efficiency of the treatment plant. The efficiency of the separa

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Kara, Fadime. "Investigation Of Sodium And Potassium Ions In Relation To Bioflocculation Of Mixed Culture Microorganisms." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608488/index.pdf.

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Bioflocculation happens naturally and microorganisms aggregate into flocs during wastewater treatment. It is critical to understand the mechanisms of bioflocculation and its impact on the following solid/liquid separation process since seperation by settling is one of the key aspects that determine the efficiency and the overall economy of activated sludge systems. Bioflocculation occurs via extracellular polymeric substances (EPS) and cations by creating a matrix to hold various floc components together so the cations become an important part of the floc structure. The main objective of this

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Henriques, InÃªs Domingues. "Elucidating the Response of Activated Sludge Cultures to Toxic Chemicals at the Process, Floc and Metabolic Scales." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/27937.

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Activated sludge treatment systems rely on a microbial consortium structurally organized in bioflocs to treat pollutants present in wastewater. The treatment process efficiency in these systems can be severely affected by toxic chemicals present in the influent wastewater. The effects of chemical toxins at the treatment process level are determined by the mechanisms that occur at the biofloc and cellular levels, which can be physical, chemical and physiological in nature. We believe that the overall process effects of chemical toxins on activated sludge systems likely result from a combination

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35

Ripley, Elliott Blake. "SETTLING PERFORMANCE IN WASTEWATER FED HIGH RATE ALGAE PONDS." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1055.

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Although high rate algae ponds (HRAPs) are a proven wastewater treatment technology with numerous environmental, social, and economic benefits, their widespread use has been hindered by inconsistent and unreliable settling performance. Hence, the goal of this thesis is to investigate how specific operational parameters affect the settling performance of HRAPs. Nine HRAPs (30 m2 surface area, 0.3 m depth) were operated as three triplicate sets, with each set run on either a 2, 3, or 4 day HRT continuously from January 25, 2012 through April 11, 2013. Settling performance was determined (i) by m

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Narvekar, Sneha Pradip [Verfasser], Kai Uwe [Gutachter] Totsche, and Ingrid [Gutachter] Kögel-Knabner. "Role of bacterial biofilms and extracellular polymeric substances in the colloidal stability and transport of hematite nanoparticles in synthetic porous media / Sneha Pradip Narvekar ; Gutachter: Kai Uwe Totsche, Ingrid Kögel-Knabner." Jena : Friedrich-Schiller-Universität Jena, 2017. http://d-nb.info/117760275X/34.

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37

Miller, Mark W. "Optimizing high-rate activated sludge: organic substrate for biological nitrogen removal and energy recovery." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/78208.

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Although the A-stage high-rate activated sludge (HRAS) process destroys some of the chemical energy present in municipal wastewater, this process has been gaining attention as a viable technology for achieving energy neutrality at water resource recovery facilities. In addition to carbon capture for energy recovery, A-stages are also being utilized upstream of shortcut biological nitrogen removal (BNR) processes as these BNR processes often require a controlled influent carbon to nitrogen ratio that is lower than required for conventional BNR processes. While there is extensive knowledge on co

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Carriot, Nathan. "Caractérisation de la production métabolique de biofilms marins. : Vers une application à l'étude de biofilms complexes in situ." Electronic Thesis or Diss., Toulon, 2022. http://www.theses.fr/2022TOUL0001.

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Le phénomène de biofouling est un processus naturel qui impacte toutes les surfaces immergées en milieu marin engendrant des problèmes économiques et écologiques majeurs à l’échelle planétaire. Il est notamment induit par la formation de biofilms marins correspondant à la colonisation des surfaces immergées par des bactéries s’organisant en communautés en s’entourant d’une matrice de substances polymériques extracellulaires (EPS). L’objectif de ce travail est l’utilisation et le développement de méthodologies permettant l’étude et la compréhension de l’étape précurseur de ce phénomène. La corr

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Ersan, Yusuf Cagatay. "The Effects Of Seed Sludge Type And Anoxic/aerobic Period Sequence On Aerobic Granulation And Cod, N Treatment Performance." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615330/index.pdf.

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The aim of this master thesis study was improvement of the required operational conditions for aerobic granulation in sequencing batch reactors (SBRs). In the first part of the study, membrane bioreactor sludge (MBS) and conventional activated sludge (CAS), were used to investigate the effect of suspended seed sludge type on granulation in SBRs. The MBS granules were found to be advantageous in terms of size, resistance to toxic effects, stability and recovery compared to CAS granules. During non-inhibitory conditions, sCOD removal efficiencies were 70&plusmn<br>13% and 67&plusmn<br>11% for M

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Coburn, Kimberly Mary. "Effects of Extracellular Polymeric Substance Composition on Bacteria Disinfection by Monochloramine." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1353016531.

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Verneuil, Laurent. "Toxicité environnementale et écotoxicité de nanotubes de carbone chez des diatomées benthiques : de la cellule au biofilm." Thesis, Toulouse, INPT, 2015. http://www.theses.fr/2015INPT0006/document.

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Différents effets de nanotubes de carbone (NTC) sur des diatomées benthiques ont été évalués via des approches microscopiques et biochimiques. Il a été montré que la structure du frustule, paroi silicifiée propre aux diatomées, est déterminante sur l'entrée ou non des NTC dans les cellules. Une internalisation des NTC dans la cellule a conduit à des effets génotoxiques et tératogènes. L'interaction des NTC avec les substances polymériques extracellulaires (SPE) produites par les diatomées a aussi été évaluée. Les SPE ont favorisé l'agglomération des NTC entre eux, ainsi que leur isolement phys

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Frías, Seoane Alina. "Caracterización estructural de bacterias antárticas adaptadas al frío y detección de nuevos emulsionantes: estudio de la cepa "Shewanella vesiculosa M7(T)”." Doctoral thesis, Universitat de Barcelona, 2012. http://hdl.handle.net/10803/85406.

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Esta memoria doctoral forma parte del proyecto financiado por el Ministerio de Ciencia e Innovación (CICYT, CTQ2010-21183-C02-01), el cual tiene entre sus objetivos la búsqueda de nuevas cepas con capacidad para producir emulsionantes naturales poliméricos. Existe un interés real en el aislamiento y caracterización estructural y funcional de nuevos exopolímeros (EPS) obtenidos a partir de microorganismos de ambientes extremos que pudieran ser utilizados con estos fines en diversas industrias. Para ello, se realizó en primer lugar el estudio de los EPS desde el punto de vista ultraestructur

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Redmile-Gordon, Marc. "Investigating the functional potential of microbial extracellular polymer substances (EPS) in agricultural soils." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616636.

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Most microbial life on earth exists as a collective entities, or 'biofilms'. These biofilms consist of the microbial cells and the extracellular biopolymers (EPS) they exude. The EPS serve many purposes of benefit to the microorganisms, but whereas EPS have received much attention in medical sciences, the science of EPS in soil is relatively undeveloped. Adding EPS to porous media (such as sand or soil) can' improve water-retention which is of great potential benefit to agriculture. ,It is not cost-effective to do this directly however due to the cost of deployment and physical incorporation w

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Pierre, Guillaume. "Caractérisation biochimique d’exopolymères d’origine algale du bassin de Marennes-Oléron et étude des propriétés physico-chimiques de surface de micro-organismes impliquées dans leur adhésion." Thesis, La Rochelle, 2010. http://www.theses.fr/2010LAROS314/document.

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Le principal objectif de cette thèse était de mieux comprendre l’importance des Substances Polymériques Extracellulaires (SPE) dans la structuration et la formation des biofilms benthiques ; tout en s’inscrivant dans une étude plus globale des mécanismes écologiques impliqués dans le fonctionnement des vasières intertidales. La mise au point des dosages biochimiques a été effectuée sur le mucilage de l’algue Chaetomorpha aerea et a permis en parallèle de purifier un polysaccharide sulfaté riche en galactose, présentant une activité bactéricide sélective contre la souche Staphylococcus aureus (

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De, Crignis Margot. "Déterminisme de la production bactérienne dans les vasières intertidales du Bassin de Marennes-Oléron : rôle des exopolysaccharides." Phd thesis, Université de La Rochelle, 2010. http://tel.archives-ouvertes.fr/tel-00605659.

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Les vasières intertidales sont le siège d'une forte production primaire sous la forme d'un biofilmmicrophytobenthique qui se développe en surface à marée basse. Ce biofilm se compose principalement de diatomées et de bactéries hétérotrophes. Ces deux composantes sécrètent des substances polymériques extracellulaires (EPS) qui jouent différents rôles dans le biofilm. Le travail présenté s'est basé sur différentes échelles d'observation (in situ à 2 saisons, mésocosme en laboratoire, et échelle fine du biofilm en microscopie confocale) et a permis de mettre en évidence les interactions des diato

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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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Kuklinski, Andrzej [Verfasser], and Wolfgang [Akademischer Betreuer] Sand. "Development of extracellular polymeric substance-derived protective films against microbiologically influenced corrosion by Desulfovibrio vulgaris / Andrzej Kuklinski ; Betreuer: Wolfgang Sand." Duisburg, 2017. http://d-nb.info/1132510546/34.

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Nassar, David Aziz. "A Mathematical Model of Biofilm Growth and Decay." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1239645901.

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Riera, Elisabeth. "Vers une construction raisonnée d’une nouvelle génération de récifs artificiels : Analyses comparatives des facteurs intrinsèques favorisant leur colonisation de la micro à la macro-échelle." Thesis, Université Côte d'Azur, 2020. http://www.theses.fr/2020COAZ4001.

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Les récifs artificiels sont des structures immergées posées délibérément sur le fond marin pour imiter certaines caractéristiques d’un habitat naturel, ils sont utilisés depuis des milliers d’années par les hommes dans le but d’améliorer leurs pratiques de pêches et depuis peu ils sont également employés pour la protection voire la restauration de certains habitats marins. Malgré ces divers objectifs, il réside encore un manque de fondements scientifiques pour déterminer la qualité de ces structures mises à l’eau afin d’en évaluer leur efficacité. Les présent travaux, focalisés sur l’étude de

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Robles, Martínez Ángel. "Modelling, simulation and control of the filtration process in a submerged anaerobic membrane bioreactor treating urban wastewater." Doctoral thesis, Editorial Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/34102.

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El reactor anaerobio de membranas sumergidas (SAnMBR) está considerado como tecnología candidata para mejorar la sostenibilidad en el sector de la depuración de aguas residuales, ampliando la aplicabilidad de la biotecnología anaerobia al tratamiento de aguas residuales de baja carga (v.g. agua residual urbana) o a condiciones medioambientales extremas (v.g. bajas temperaturas de operación). Esta tecnología alternativa de tratamiento de aguas residuales es más sostenible que las tecnologías aerobias actuales ya que el agua residual se transforma en una fuente renovable de energía y

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