Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 43 for “"extracellular polymeric substances"”.
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Role of Extracellular Polymeric Substances (EPS) on Biofilm Disinfection in a Model Drinking Water Distribution System
… systems. This study investigated the role of extracellular polymeric substances (EPS) in the biofilm life cycle, including planktonic cells, attached biofilm, detached biofilm clusters and redistributed biofilm, in a model distribution system with minimal disinfectant residuals. EPS …
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Extracellular Polymeric Substances in Activated Sludge Flocs: Extraction, Identification, and Investigation of Their Link with Cations and Fate in Sludge Digestion
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 …
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3-D Computational Investigation of Viscoelastic Biofilms using GPUs
… the materials they secrete, collectively called “extracellular polymeric substances (EPS)”. The EPS consists mostly of bio-polymers, which cross link into a network that behave viscoelastically under deformation. We propose a single-fluid multi-component phase field model of biofilms that captures …
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MODELING REORGANIZATION OF PCF10-INDUCED COMPLEX STRUCTURES IN ENTEROCOCCUS FAECALIS UNDER ERYTHROMYCIN TREATMENT
… adhered to a surface, bound together by extracellular polymeric substances (EPS). They are ubiquitous in nature and develop on a range of surfaces including living tissue. Biofilms themselves typically do not negatively affect their host, but under certain conditions they can retain …
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GENOMIC AND PHYSIOLOGICAL INSIGHTS INTO BACTERIAL HEAVY METAL RESISTANCE MECHANISMS FOR ENVIRONMENTAL DECONTAMINATION
… explore complementary aspects: (1) Analyses of extracellular polymeric substances (EPS) and biofilm formation of Serratia plymuthica strain As3-5a(5) highlight the role of tightly bound EPS in Cu removal from industrial wastewaters; (2) Genome sequencing and transcriptomic analysis of …
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Formation and evaluation of the filterability of aerobic granules in a granular sludge membrane bioreactor
… membrane fouling caused by adsorption of soluble extracellular polymeric substances (sEPS) was more important in the granules than in the flocs. According to the results of this study, granular sludge might not be able to alleviate the membrane fouling problem in MBRs. Furthermore, it could lead …
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Hydrothermal treatment of sewage sludge under oxidative and nonoxidative conditions
… to: soluble microbial products, loosely bound extracellular polymeric substances, tightly bound extracellular polymeric substances and naked cells. Each fraction was subjected separately to treatment by wet oxidation and the results were compared with those obtained from the treatment of the …
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Mathematical Models of Biofilm in Various Environments
… of microbial cells living in self-produced extracellular polymeric substances (EPS), which always attached to various kinds of surfaces. In this thesis, we studied several mathematical models of biofilm in the human body and marble environment. Some related background of biofilm growth and …
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Combating biofilms and antibiotic resistance using synthetic biology
… communities encased in a hydrated extracellular polymeric substances (EPS) matrix (2, 3). Biofilms are crucial in the pathogenesis of many clinically-important infections and are difficult to eradicate because they exhibit resistance to antimicrobial agents and removal by host …
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Phase-Field Model For Heterogeneous Biofilm-Solvent Interaction and 3-D Numerical Simulation by GPUs
… sugary molecular strands, collectively termed 'extracellular polymeric substances' or 'EPS'. The cells produce EPS and are held together by these stands, allowing them to develop complex, three-dimensional, resilient, attached communities.</p> <p>In our binary (two components) model, we consider …
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Mathematical Modelling of Mechanisms for Biofilm Expansion
… cells embedded in a sticky material composed of extracellular polymeric substances (EPS) produced by the cells themselves. The physical structure of the biofilm has been shown to be important to its evolutionary success. EPS is involved in maintaining structural integrity of the biofilm and …
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Bioinstrumentation and Statistical Methods for Investigating Host-Microbial Interactions
… attach to the algal host and the production of extracellular polymeric substances. Lastly, I introduce a multivariate analysis technique to visualize microbial community structure. I explain how statistical hypothesis testing can be simultaneously addressed while reducing its dimensionality. I …
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Microbial flocculation for large scale harvesting of marine microalgae for the production of biodiesel.
… principle that by stressing certain bacteria, extracellular polymeric substances (EPS) may be produced to co-flocculated the microalgae. With a dosage of 0.1 g L⁻¹ of organic carbon (acetic acid, glucose or glycerine) and a 24 h mixing time, a recovery efficiency (RE) of over 90% and a …
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Factors Influencing the Morphology of Sea Ice
… and the presence of microorganism' secretions: extracellular polymeric substances (EPS). Salinities of 10 psu, 20 psu, and 30 psu, were used at the following temperatures: -20°C, -10°C and -5°C. The temperature and salinity data showed that the growth rate of ice, increases with the decreasing …
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Microbial Evolution In Sea Ice: Communities To Genes
… of microorganisms decreased in the coldest ice, extracellular polymeric substances were produced throughout the winter in all measured horizons. Microbial communities entrained from seawater into sea ice were preserved in the ice, with communities dominated by SAR11 Alphaproteobacteria (Bacteria) …
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Wastewater Carbon Diversion and Recovery via Primary Sludge Production, Thermal Hydrolysis, and Anaerobic Digestion
… result of THP was because of the destruction of extracellular polymeric substances and increase of hydrolysis rate. However, THP also brings side effects such as high free residual ammonia and recalcitrant dissolved organic nitrogen (rDON) in the effluent. Besides, a comprehensive understanding …
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Effect of Digestion Processes on Dewatering and Bound Water Content of Sludge
… of digestion processes and their effects on extracellular polymeric substances, bound water content and dewatering. Bound water tests were used to determine the maximum achievable solids concentration on dewatering. Bound water content of solids obtained from field centrifuges run at …
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Do Roots Bind Soil? Comparing the Physical and Biological Role of Plant Roots in Streambank Fluvial Erosion
… factors that influence fluvial entrainment, like extracellular polymeric substances (EPS), soil aggregate stability and root length density, were measured following erosion testing. For flume experiments, three streambank boundary conditions were constructed to simulate unvegetated streambanks, as …
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Factors affecting the filtration characteristics of aerobically digested sludge
… be biological in nature. Biologically produced extracellular polymeric substances are secreted by or exposed on the surface of bacteria during the endogenous phase of metabolism. These polymers cause coagulation and bridging between sludge particles, thus affecting the filtering properties. This …
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Anaerobic Digestion: Factors Effecting Odor Generation
… elucidating the nature and impact of the various Extracellular Polymeric Substances (EPS) fractions on odors. The results showed that odors decreased with an increase in the anaerobic digester SRT. VSR and RBA correlated with odors; however, as only one type of sludge was assessed, the conclusions …
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