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 11 of 11 for “"batch systems"”.
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Manganese dioxide reduction kinetics by Geobacter sulfurreducens and associated biofilm morphology in a flow-through reactor
… rely on using parameters that are determined in batch systems. Batch systems do not adequately account for the variation that may exist in kinetic parameters. They are unable to estimate how environmental conditions present in a flow-through system could impact the reduction efficiency of DMRBs. …
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Liquid-Liquid Extraction in Agitated Contactors Involving Droplet Coalescence and Redispersion
… and the extension of mathematical models from batch systems to continuous ones is discussed. A six-inch diameter sixteen compartment Oldshue-Rushton column was designed and constructed to study hydrodynamics and mass transfer. Cyclic phase inversion, a pseudo-steady state condition, under which …
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Bioremediation of Phenolic Compounds in Circulating Packed Bed Bioreactor
… evaluate bioremediation of phenolic compounds in batch systems and in continuously operated circulating packed bed bioreactors (CPBBs). The biodegradation of individual phenol, o-cresol, and p-cresol and mixtures of these compounds (binary and ternary mixtures) were studied. In addition to …
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Dynamic chamber system for determining equilibrium phosphorus concentration (EPC0) in sediments
… of a sediment. EPC0 is typically measured by batch reactors where small quantities of sediment and water are continuously shaken following addition of varying amounts of initial P to determined adsorbed fraction after a fixed period of time. These systems cannot maintain bed sediment structure …
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Recovery Of Hydrogen And Helium From Their Mixtures Using Metal Hydrides
… Space Center during purging of the hydrogen systems and supply lines. This process is done prior to and after hydrogen servicing. The purged waste gases are lost to the atmosphere, resulting in an annual loss of 2 million and 0.1 million standard cubic meters of helium and hydrogen, …
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The chromatographic separation of carbohydrate mixtures
… 6.69% w/v fructose. A theoretical link between batch and semicontinuous chromatographic equipments has been determined. A computer simulation was developed predicting successfully the purging concentration profiles at `pseudo-equilibrium', and also certain system design parameters. An important …
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Mapping the Electrodialysis Architecture Design Space by Determining Optimal System Configurations for Different Production Outputs
… electrodialysis reversal (PV-EDR) systems have been shown to produce water more cost-effectively and energetically efficiently than other desalination technologies. The goal of this work is to establish a framework for designing and optimizing PV-EDR systems for designers to develop …
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Investigation of Natural Zeolitic Tuffs on their Ability for Sewage Cleaning Purposes
… from simple and complex solutions was done in a batch reactor and in an ion exchange column. In batch systems, the sample of untreated brownish tuff removed ions more efficiently from simple solutions containing only one type of ions (Cd2+, Cu2+, Ni2+ and Zn2+) than the reddish tuff. In contrast, …
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Study of Hydrocarbon Waste Biodegradation and the Role of Biosurfactants in the Process
Two types of oily waste sludges generated by a railroad maintenance facility were studied to reduce the volume of hydrocarbon waste. The specific goals of this laboratory study were to evaluate rate and extent of microbial degradation, benefits of organism addition, role of biosurfactant, and …
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Dead-end and crossflow microfiltration of yeast and bentonite suspensions: experimental and modelling studies incorporating the use of artificial neural networks
… filtration characteristics of microfiltration systems was assessed. ANNs were developed to correlate specific cake resistance and steady state flux of dried yeast suspensions in dead-end microfiltration for a range of operating parameters. Trained networks were used in predicting filtration …
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Zeolite Incorporated Materials for Targeted Biomass Retention and Pollutant Removal
… treatment cause eutrophication in aquatic systems. The aquatic health of the Volta River in Ghana was assessed by monitoring pollutants including water quality parameters, contaminants of emerging concern, antibiotic resistance, and the microbial community. While Ghana is a low- to middle- …