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 29 for “"Solids Loading"”.
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The effect of particle size distribution on the rheology of ultrafine coal-water slurries
… it has been found that the maximum solids loading for ultrafine coal slurries ranges from 55 to 60 percent by weight as compared to 70 to 75 percent solids reported for coarser slurries. It was further shown that as particle size decreases there is an increase in slurry viscosity and …
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Freeze Casting of Aqueous PAA-Stabilized Carbon Nanotube-Al2O3 Suspensions
… The dispersant, dispersant amount, pH and solids loading were examined to determine the best conditions for freeze casting. Based on adsorption and viscosity data, optimal conditions for freeze casting were found with Poly(acrylic acid) (PAA) dispersant, at 2.00 wt% (of Al2O3), pH of 9.5, …
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Fabrication of porous ceramics and composites by a novel freeze casting process
… of freeze casting. Basic factors such as initial solids loading, cooling rate, and sintering temperature that would affect the final morphologies and the effect of additives have been studied. Porous alumina ceramics with lamellar microstructure exhibited compressive strengths up to 123 MPa for …
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Seasonal influent characterization, model calibration, SRT and energy usage for nitrogen removal at a full scale wastewater plant
… difference in terms of nitrate removal capacity. Solids Residence Time (SRT) is a very important operational parameter in a full-scale system and directly influences the effluent quality. Higher SRTs are associated with high bioreactor biomass concentrations, which can provide improved effluent …
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Utilization of a combined activated sludge fixed film media system for treatment of a high strength, high ammonia, industrial wastewater
… may be maintained with little or no increase in solids loading to the clarifier. The ideal combined system can treat higher organic and ammonia loadings than a conventional system, and is more resistant to temperature changes and shock loadings. Overloaded plants can be outfitted with media as an …
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The development of a mathematical model for the bioextraction of the critical raw material magnesium from mine waste using acidithiobacillus caldus
… Systematic optimisation of the initial pH and solids loading resulted in optimised conditions of pHi = 1 and 0.75% solids loading (m/v). These conditions achieved 98.5% extraction of magnesium, complete extraction of calcium, and a processing throughput of 0.005 gM g−waste/h over a 60 day …
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Study of Freeze-Cast Porous Silica Nanoparticle-Based Composites
… effect depends on composition and initial solids loading. After sintering at 1250 °C for 1 h, a ceramic containing 10 vol% kaolinite and 8 vol% silica has a maximum strength while maintaining a ~69% porosity. The kaolinite-silica composites with lower solids loading exhibit faster sintering …
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Evaporating cross flow spray jets in gas-solid circulating fluidized bed
… effects such as nozzle aspect ratio and solids loading on the spray structure, evaporation characteristics as well as local phase distributions of solid concentration, gas temperature and velocity. The governing equations of both gas and solids phases are solved by the Eulerian method …
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Concurrent evaporating spray jets in dilute gas-solid pipe flows
Evaporating spray jets into gas-solids suspensions are encountered in many industrial applications. The rapid evaporation of spray jets has significant effects on the gas-solids mixing near the jet nozzle regions, including non-uniform solids concentration dilution, gas/solids temperature …
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Formulation of uv curable resins utilized in vat photo polymerization for the additive manufacturing of gun propulsion charge in 3d printers
… with suspended energetic materials at various solids loading levels. Developing techniques for UV curing formulations of highly loaded energetic suspensions is a challenging feat that must satisfy several requirements and produce a high quality formulation with synergistic ingredient …
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Characterization, utilization and treatment of mechanized clam processing wastes
… the water volume of water used and the loading of organic material and suspended solids. Disposal of sludges and solid wastes also present problems to the industry. Three processing plants were studied to characterize the nature, sources and variations in waste generation and to evaluate …
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Studies of multiphase distribution and flow in bubble/ slurry bubble columns with /without internals and advanced sustainable construction materials using sophisticated measurement techniques
… obtained results indicated that increasing the solids loading increased the solid holdup and decreased the liquid holdup.</p><p>However, the gamma-ray computed tomography (γ-CT) technique has been employed to investigate the aggregate distribution/dispersion in self-consolidating concrete (SCC) …
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The sources and fates of nutrients in the Deep Lake watershed
… in nitrogen, phosphorus, and total suspended solids loading at study sites that received frequent cattle activity. It also helped to determine the presence of internal loading occurring in the anoxic hypolimnion that was present during the summer and late fall. These results allow for the …
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Comparison of Water Quality, Rainbow Trout Production, and Economics in Oxygenated and Aerated Raceways
… raceways (7.4 and 0.57 mg/L). Total settleable solids loads were significantly greater (P < 0.001) in aerated raceways (10.3 g/L/day) than in oxygenated raceways (8.8 g/L/day). Dissolved nitrogen (%), total gas pressure, and other water quality parameters (CO2, nitrite nitrogen, alkalinity, pH, …
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The effects of low aspect ratio and heat exchanging internals on the bubble properties and flow regime in a pilot-plant bubble/slurry bubble column for Fischer-Tropsch synthesis
… internals, and reducing the aspect ratio and the solids loading, increase the local gas holdup, interfacial area, bubble passage frequency, and decrease the bubble rise velocity, bubble chord length. Meanwhile, the aspect ratio H/D = 4, and 5 provide enough height to established the fully …
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Van Der Waals Interactions Based Rheological Analysis for Electrosterically Stabilized Nano-Sized Alpha Silicon Carbide-Lactobacillus Gg Dispersions
… amounts of dispersant, binder, plasticizer and solids loading using the Krieger-Dougherty fit and Liu's model are presented and discussed. Alpha-SiC/H2O/alpha-SiC and alpha-SiC/H2O/LGG polar solvent based samples were also fabricated to test for an application area of nano-bio technology: A …
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Sulphur sorbent particle effects in fluidised combustion
… The contribution of sorbent attrition to the solids loading of downstream gas cleaning equipment is highlighted.
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The application of laser measurement techniques to the pneumatic transport of fine particles
… velocity profiles were used to evaluate the mean solids velocity and these mean values were compared with the results obtained using a technique developed by the author, which measures the mean solids velocity directly. Solids loading ratios up to 2.0, and conveying velocities up to 56 m/s, have …
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Applications of alpha-amylase corn in the dry grind process for fuel ethanol production
… consumed by pumping systems and limit slurry solids contents to 32% w/w. Furthermore, enzymes needed for converting starch into glucose account for a considerable fraction of total production costs. To address these issues, inclusion of amylase corn was evaluated. This corn contains …
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An investigation into the use of froth colour as sensor for metallurgical grade in a copper system
… The relationship between froth colour and % solids was also investigated as it was believed that solids loading could be reflected by froth colour. This work was aimed at evaluating the empirical relationship between froth colour and copper grade in the laboratory and then investigating …
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