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 221 for “"Bioreactors"”.
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Venturi aeration of bioreactors
… 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 …
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Denitrification in Membrane Bioreactors
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 …
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Performance Enhancement of Aerobic Landfill Bioreactors
The operation of aerated waste cells has several advantages over traditional landfills such as, increased rate of waste stabilization and reduced greenhouse gas emissions. However, the operation of aerated waste cells is fraught with uncertainties because it has not been thoroughly studied to …
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Environmental tradeoffs of denitrifying woodchip bioreactors
… innovative practices like woodchip tile bioreactors, constructed wetlands, drainage water management systems, and riparian buffer strips for treating agricultural drainage water are continually being developed and implemented across the Midwestern United States. Like drainage, bioreactors …
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Protein polarization in packed hollow fibre bioreactors
… the extra capillary space (ECS) of hollow fibre bioreactors (HFBRs), can influence the hydrodynamics of such devices. A mathematical model was developed to describe the coupled hydrodynamics and high molecular weight protein transport in a cell filled HFBR. It was assumed that the multi-fibre …
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Dynamic modeling and analysis of oscillatory bioreactors
Dynamic modeling of bioreactors is a challenging problem. The complexity of first principle models also make model validation and analysis very difficult and model-based controller design practically intractable. This thesis has focused on finding an effective tool for model dynamic analysis, …
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Modeling and optimization of bioreactors and lipid bodies
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms
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Miniaturisation of pH Holographic Sensors for Nano-Bioreactors
… 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 …
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Modeling sparging related death in animal cell bioreactors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1998.
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Dynamic operation of mammalian cell fed-batch bioreactors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Applied Biological Sciences, 1992.
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Modelling and Simulation of Membrane Bioreactors for Wastewater Treatment
… As the thesis is focused on modelling membrane bioreactors (MBRs) which are known to experience membrane fouling as a result of adsorption of biopolymers present in the bulk liquid onto and within the membrane, all activated sludge models considered in this thesis are able to predict, with …
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Biofiltration of volatile organic compounds using fungal-based bioreactors
… sp. were evaluated for use in vapor-phase bioreactors. Batch tests indicated that E. lecanii-corni can tolerate low pH and minimal nutrient conditions and degrade a wide variety of contaminants including toluene and methyl propyl ketone. A series of bench-scale bioreactor studies were then …
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Greenhouse Gas Production and Nutrient Reductions in Denitrifying Bioreactors
… to reduce excess nitrogen, and denitrifying bioreactors (DNBRs) are an emerging technology harnessing this biochemical process. Previous DNBR research has established successful nitrate removal, whereas this study examines the potential to expand DNBR functionality to address excess …
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Transverse vibration as a fouling limitation strategy in membrane bioreactors
… contributes to the performance of membrane bioreactors (MBR). Aeration is commonly applied in MBRs to control the rate of fouling. In applications where aeration is not a feasible option, such as in anaerobic membrane bioreactors (AnMBRs), limiting fouling could be a challenge. Transverse …
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Bioreactors and microbioreactors for electromechanical stimulation in cardiac tissue engineering
This PhD thesis work was focused onto the development of advanced culture systems for laboratory studies of cardiac tissue engineering, featuring controlled electrical, or combined electro-mechanical stimulation of the culture environment. In consideration of the different research interests …
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Measurement and Modeling of Nitrate-Nitrogen Transport in Subsurface Bioreactors
… understanding of nitrate-N transport through bioreactors, and consequently, the development of design standards and operating protocols for field-scale systems.
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Compost Bioreactors for Removing Agricultural Chemicals From Tile Drainage Water
The 6-month-old compost was also examined for its capacity to promote denitrification in column studies. The extent of nitrate removal depended on the solid retention time, but could also have been influenced by the amount of compost in the column that could be utilized as an energy source by …
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Characterizing transient and seasonal responses of bioreactors for subsurface drains
… farmlands. The use of fixed-bed, in-field tile bioreactors is one such practice being investigated. In-field bioreactors are trenches filled with carbon material (usually wood chips) which serve as a medium for denitrifying bacteria to grow, thus reducing the amount of nitrate that enters water …
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Examination of synergism in nitrate and orthophosphate removal in bioreactors
The use of fertilizer on agricultural cropland to replenish soil nutrients removed by crops is one of the most important steps to continually producing healthy, high yielding crops. However, the historic overuse of these fertilizers has had a detrimental effect on the receiving waters of …
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