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 13 of 13 for “"biofilm thickness"”.
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Mathematical Modeling for Nitrogen Removal via a Nitritation: Anaerobic Ammonium Oxidation-Coupled Biofilm in a Hollow Fiber Membrane Bioreactor and a Rotating Biological Contactor
… anaerobic ammonia oxidation (anammox)-coupled biofilm in a counter-diffusion hollow fiber membrane bioreactor (HFMBR) and a nitritation: anammox-coupled biofilm in a co-diffusion rotating biological contactor (RBC) were developed and implemented using AQUASIM. Four different start-up scenarios …
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Factors Influencing the Nitrification Efficiency of Fluidized Bed Filters With a Plastic Bead Medium
… increased from 0.5 to 0.99 mg/L. Data on biofilm development indicates a reduction in biofilm thickness as flow rate was increase, and significant biofilm accumulation as ammonia supply increased. The results of this work were compared to performance data generated using a steady state …
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Applications of Membrane Aerated Biofilm Reactors for Wastewater Treatment
… the commercial application of membrane aerated biofilm reactors has not realized the potential that the published research demonstrates. <br/><br/>The early research demonstrated the ability of membrane aerated biofilm reactors to achieve good levels of pollutant removal from various types of …
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Bacterial adhesion and detachment from model mineralized biofilms
… the pathogens have been found to be harbored in biofilm layers inaccessible to disinfectants. Biofilm growth is ubiquitous in both natural and engineered environments, including the pipe networks of DWDSs. Calcium carbonate is also often found precipitated on pipe walls and biofilms, but the …
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Electrical current generation by wild type and mutant Shewanella strains
… dependent on the ability of cells comprising a biofilm to shuttle soluble electron carriers between an electrode and its outer membrane cytochromes. The extracellular electron transfer capabilities of S. oneidensis mutant strains containing deleted or transposon-interrupted copies of genes known …
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Towards real-time monitoring of bacterial cultures without the need for physical sampling: elastic scattering, fluorescence and Raman spectroscopy of Escherichia coli cultures.
… a hydration layer that forms spontaneously when biofilms dry. This layer at optical thickness ˂ 20 µm is approximately 1-2 orders of magnitude thinner than the biofilm thickness as measured by confocal Raman microscopy and confocal fluorescent microscopy. Drying/rehydration experiments performed …
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An analysis of microbial film fermentor system for production of secondary metabolites
Performance of a three-phase fluidized-bed biofilm fermenter system, which is used for the production of a secondary metabolite, is analyzed through computer simulation techniques. Penicillin fermentation was chosen for the model system. From the steady-state analysis, it was found that a …
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Kinetics and Mechanisms of Low-Concentration - Multisubstrate Utilization by Biofilms (Soluble Microbial Products, Steady-State Secondary, Oligotrophic Bacteria, Biodegradation of Trace Organics, Modeling)
… employed laboratory-scale completely mixed biofilm reactors and naturally grown oligotrophs. The first study addressed formation of soluble microbial products (SMP) when the organic concentration was low and biofilms were the predominant form of biological activity. The experimental results …
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Artificial teeth : dental biofilm analysis on a chip
… to simulate the growth of complex dental biofilm. Dental plaque formation is not only a precursor to tooth decay, but also induces more serious systemic health problems such as cardiovascular disease, pre-term labor, and diabetes. Therefore, understanding the conditions promoting …
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The role of biofilms in Legionella pneumophila transmission in drinking water distribution system
Biofilms in drinking water distribution systems (DWDS) or premise plumbing systems could facilitate the persistence and transmission of pathogenic Legionella pneumophila (L. pneumophila), thus raise human health concerns. L. pneumophila cells can accumulate in biofilms, be protected from …
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Dreidimensionale Struktur- und Vitalitätsverteilung oraler bakterieller Biofilme (dentaler Plaque)
… Verfahren zur Untersuchung von nativen Biofilmen zu entwickeln und die Parameter "Vitalität" und "Dicke" der dentalen Plaque zu untersuchen. Hierfür wurden die Methoden der Vitalfluoreszenztechnik und der konfokalen Laser-Scanning-Mikroskopie (CLSM) kombiniert. <br>In einem Vorversuch …
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Pasteurella multocida biofilm formation, and the interrelationship of P. multocida with Histophilus somni in a polymicrobial biofilm during bovine respiratory disease
… (BRD) and avian cholera may be associated with biofilm formation. Biofilm formation was inversely related to capsule production (determined by uronic acid and N-acetylglucosamine assays), and was confirmed with capsule-deficient mutants of mucoid strains. Capsule-deficient mutants formed …
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Adsorbent-based algal cultivation system to facilitate integration of algal biofuel production with wastewater treatment
… 4, a commercially available rotating algal biofilm system (Algaewheel®) was used to evaluate the technical barriers of using algae to treat swine wastewater and subsequently convert the wet mixed biomass to biocrude oil via hydrothermal liquefaction (HTL). Three different hydraulic retention …