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 34 for “"photobioreactors"”.
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Investigating the Effects of Sparger Design in Column Photobioreactors
… studies where designs of rectangular column photobioreactors (PBRs) are changed based on the sparger types, spacings, and positions. Computational Fluid Dynamics (CFD) is used to predict fluid flow patterns, thermal profiles and additional hydrodynamic and heat transfer parameters in these …
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Wastewater Treatment and Nitrogen Removal in Bench-Scale Photobioreactors Operated with Solids Recycling
… and algal-bacterial productivity in bench-scale photobioreactors (PBRs) simulating winter pond conditions in San Luis Obispo, California and a 6-acre raceway system in Delhi, California. Two sets of duplicate photobioreactors operated with or without solids recycling were fed primary clarifier …
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Modelling airlift photobioreactors for algal bioenergy, using Scenedesmus sp. as the model species
… Algae production occurs in specially designed photobioreactors, which are typically light limited. Hence, optimization of light supply to algae is key. A mathematical model of a photobioreactor is useful to aid in the design and optimization process. A model enables the prediction of …
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Exploring the potential resource recovery from pot ale utilising microalgae and novel LED photobioreactors.
… be improved. In this study, a range of novel LED photobioreactors designed by industrial partners Xanthella Ltd were utilised to produce high density cultures, containing concentrations of high value carotenoid pigment zeaxanthin. It was observed in this study that the production of zeaxanthin and …
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Effect of light supply in photobioreactors on the biomass productivity and energy efficiency of Scenedesmus sp
… energy inputs must be achieved in large photobioreactors. According to literature, one of the main factors limiting growth is the inefficiency of light utilization (Posten, 2009; Janssen et al., 2003; Carvalho et al., 2006). In a photobioreactor, as biomass concentration and depth of …
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Characterizing the Growth of Cyanobacteria Using Coiled and Bubble Column Photobioreactors and Its Separation by Flocculation Filtration
… In the first part of the research, since the photobioreactors provide ambient growth environment and higher biomass productivity for Anabaena 7120, coiled photobioreactor was developed. The basic growth conditions required were light intensity for photosynthesis, CO<sub><sup>2</sup></sub> as …
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Tracing particle movement for simulation of light history and algal growth in airlift photobioreactors using Positron Emission Particle Tracking (PEPT)
This Thesis is embargoed. Only the Abstract is available
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A dynamic engineering model of algal cultivation systems
… an average accuracy of 7.33%+/5.65% for photobioreactors (PBR) and 6.7%+/5.33% for an open raceway pond (ORP) across five total species: Chlorella vulgaris, Desmodesmus intermedius, Galdieria sulphuraria, Galdieria sulphuraria Soos, and Nannochloropsis oceanica. The validated model …
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Mixing, mass transfer and energy analysis across bioreactor types in microalgal cultivation and lipid production
… for bioenergy, nutrients and pharmaceuticals. Photobioreactors, closed vessels for microalgal cultivation, are known to have high energy consumption due to mixing and aeration. Sparging is commonly used for mixing and gas-liquid mass transfer in photobioreactors, but is energy intensive. The …
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Establishing land tank cultivation of Asparagopsis taxiformis in Scotland
… 1341/1), in a series of commercially available photobioreactors analogous to land-based tanks. Photobioreactors were set to observe growth and biochemical content in comparable natural conditions of Scotland and its native region, Naples, Italy. The first photobioreactor, Algem, showed that the …
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Carbon dioxide mass transfer within algal raceway ponds and the potential for improvement using slopes to create wave
… a lower volumetric mass transfer rate than other photobioreactors and are typically mass transfer limited. [Please note: the full text of this thesis has been deferred until 30 September 2017]
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Novel photobioreactor systems for characterizing algal behavior in outdoor-simulating environments
… of a series of progressively sophisticated novel photobioreactors for cultivating photosynthetic microorganisms in outdoor-simulating environments. The reactors have been created with the needs of the organisms as well as the lab and scientists in mind for characterizing high productivity …
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Photochemically produced reactive species generation by extracellular organic matter sensitizers from Chlamydomonas reinhardtii
… of contaminants, EOM, and culture stability in photobioreactors.
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Eco-Integrated Production and Formulation of Arthrospira platensis Dietary Supplements
… Spirulina was cultivated in vertical tubular photobioreactors utilizing mine water supplemented with Zarrouk medium, achieving biomass yields and pigment concentrations comparable to conventional systems while significantly reducing dependence on freshwater resources. Notably, cultivation in …
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Cell-cycle dependent motility of Chlamydomonas reinhardtii and its collective motion in response to a Hagen-Poiseuille flow
… flow, a relevant component flow for air-lift photobioreactors. The cell number density profiles were calculated by an individual-based simulation and a continuum system inclusive of the buoyancy effect imposed by the aggregated cells on their surrounding fluid. Qualitative …
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Active Interfaces: From Biointerfaces to Mineralization
… products (nanometric, dielectric films for algae photobioreactors).
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Development of a photobioreactor for the cultivation of the freshwater microalga Haematococcus pluvialis
… Four successive air-lift driven novel tubular photobioreactors (termed TBRI, TBR2, AAPS™I and AAPS™2) were developed for the photosynthetic cultivation of H. pluvialis. Physical assessment revealed that the four systems differed in terms of their mass transfer, gas hold-up, flow rate and …
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Applications of spectral management in optoelectronic devices
… production and are attractive prospects for photobioreactors and building-integrated applications. Here we introduce versatile star-shaped donor-acceptor molecules based on a central BODIPY acceptor with oligofluorene donor side units. We perform comprehensive device measurements and Monte …
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Discovery of a Novel Microalgal Strain Scenedesmus Sp. A6 and Exploration of Its Potential as a Microbial Cell Factory
… An alternative to the high capital investment of photobioreactors for the cultivation of microalgae is the use of open-source and open-hardware bioreactor controller. Here, the concept of an open-hardwate bioreactor control called ``BioBrain'' is introduced. The BioBrain device is based on the …
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Potentiating Algae, Modernizing Bioeconomies: Algal Biofuels, Bioenergy Economies, and Built Ecologies in the United States and Turkey
… the infrastructures such as test tubes and photobioreactors to unpack how sustainable algal biofuels are made and remade inside of designed and engineered processes. Challenging these processes, this dissertation instead invites readers to explore alternate ways of engaging with algae and …
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