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 75 for “"batch reactors"”.
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Aerobic treatment of CTMP wastewater in sequencing batch reactors
… Volume Indices ranged from 54 to 78 ml/g (for reactors without pH adjustment). Sludge yields in the 24-hour cycle runs were about 0.12 kg MLVSS per kg COD removed, and 0.15-0.18 kg MLVSS per kg BOD₅ removed. This is only about one quarter the sludge yields typical in AS systems, both on a COD …
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Studies in process analysis and control in batch reactors
… and control of chemical processes carried out in batch reactors. The problems of pH measurement and sampling, linked to the implementation of NMR and HPLC on-line analysers, are presented as key areas in this development work. Also, part of the engineering work surnmarised in this thesis assisted …
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Nitrogen Removal From Dairy Manure Wastewater Using Sequencing Batch Reactors
… the biological nitrogen removal in sequencing batch reactors for the dairy manure wastewater. Results showed that many parameters are similar to those of municipal wastewater treatment systems. This characterization and the derived kinetic and stoichiometric parameters provided some of the …
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Biodenitrification of a medium strength nitrate industrial wastewater using sequencing batch reactors
Includes bibliographical references (pages 66-68).
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Dynamic Modelling and Optimization of Polymerization Processes in Batch and Semi-batch Reactors. Dynamic Modelling and Optimization of Bulk Polymerization of Styrene, Solution Polymerization of MMA and Emulsion Copolymerization of Styrene and MMA in Batch and Semi-batch Reactors using Control Vector Parameterization Techniques.
… emulsion copolymerization of Styrene and MMA in batch and semi-batch reactors are the focus of this work. In this work, models are presented as sets of differential-algebraic equations describing the process. Different optimization problems such as (a) maximum conversion (Xn), (b) maximum number …
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Evaluation of Nitrification Inhibition Using Sequencing Batch Reactors and BioWin Modeling, and the Effect of Aqueous Film Forming Foam on Biological Nutrient Removal
… of nitrification upsets, continuous sequencing batch reactors (SBRs) were operated to simulate the full-scale plant. Four reactors were operated in this study. One reactor was fed with raw influent (RWI) from the Nansemond Wastewater Treatment Plant (NP). Another was fed with NP primary …
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Effect of Feed Rate and Solid Retention Time (SRT) on Effluent Quality and Sludge Characteristics in Activated Sludge Systems Using Sequencing Batch Reactors
A critical element to the successful operation of activated sludge systems is efficient solid liquid separation achieved by bioflocculation. Bioflocculation refers to the process of microbial aggregation to form activated sludge flocs, dependent on the interaction of exocellular polymeric …
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The Kinetics, Biochemical Patterns, and Microbial Ecology in Multiredox (Anoxic, Microaerobic, Aerobic) Activated Sludge Systems Treating BTX Containing Wastewater
… conditions in activated sludge sequencing batch reactors. The studies showed that toluene and m-xylene were denitrified via benzoyl-CoA reductase. Although benzene, o-, and p-xylene were recalcitrant under denitrifying conditions, they were biodegraded under microaerobic (< 0.2 mg/L …
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Modelagem de tratamento biológico de esgotos em reator batelada sequencial
… has been performed is continuous stirred tank reactors, operating at very low concentration of effluent within the reactor. The rate of reaction is normaly proportional to concentration and therefore very long residence time is required. This work examines the kinetic advantage obtainable with …
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A comparison of oxygen utilization determination techniques for the activated sludge process
Evaluation of the data from the series of batch experiments has led to the following conclusions: 1. Currently used methods of quantifying oxygen uptake rate, especially for batch reactors, yield values of oxygen utilization considerably lower than those predicted by mass balance considerations for …
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Application of additives in horseradish peroxidase-catalyzed removal of phenol derivatives from aqueous solution.
… results. Although the model is obtained from batch reactors, it can also be applied to plug flow reactors and continuous stirred tank reactors as well. Experiments prove that there is no need to stir the reaction mixture during the entire reaction period. Batch reactors and plug flow reactors …
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The effects of nickel on the completely mixed activated sludge process
The purpose of this investigation was to conduct batch and continuous flow laboratory experiments with bench scale activated sludge units to determine the effects of nickel on the completely mixed activated sludge process. The model units were located in a constant temperature room maintained at …
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Kinetics of DCOD Consumption by Bacterial Suspensions
… process and such kinetics. Several batch test experiments were performed at different soluble-substratebiomass ratios in order to evaluate its impact on the kinetics and the order of the reaction. Similarly the consumption of dissolved substrate was compared using two different …
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Multi-scale modeling tools for coupled reaction, phase equilibrium and two-phase mixing phenomena with application to supercritical water heavy oil upgrading process
… a number of experiments have been performed in batch reactors to study the upgrading of various heavy oils and crude oil vacuum residua through both oil-phase pyrolysis and reaction in the presence of supercritical water (SCW). While these studies indicate that the presence of SCW can …
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Surface Sorption Properties of Halophilic Archaea
… of metal-Archaeal interactions were conducted in batch reactors as a function of pH, and solid-solute interactions. Surface complexation models (SCMs) for metal-Archaeal adsorption reactions were developed by combining sorption data with the results of acid-base titrations of the Archaeal surface. …
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Computer control of a batch process for resin manufacture
… the provision of automatic control for the batch reactors of the type presently used in industry for the production of butylated melamine formaldehyde resins. For that purpose a pilot plant was built at Aston University that was interfaced with the Departmental Honeywell 316 Computer for …
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Surface Catalyzed Fenton Treatment of bis(2-chlorethyl) ether (BCEE), bis(2-chloroethoxy) methane (BCEM) and 1,2-dichloroethane (1,2-DCA)
… solid/water ratio were systematically evaluated. Batch reactors were set-up utilizing either contaminated or uncontaminated soil that was mixed with synthetic groundwater containing the contaminants of interest. The results show an increase in contaminant reduction with a decrease in pH, an …
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Quantifying the expression of dissimilatory sulfite reductase as a metric for sulfate reduction rates
… systems. We grew Desulfovibrio vulgaris in fed-batch reactors under electron-donor limiting conditions. To simulate conditions characteristic of oligotrophic environments such as anoxic aquifers, we constrained the rates of sulfate reduction from 0.1 μM h–1 to 20 μM h–1 (0.89 – 85.9 fmol …
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Evaluation of the Degradation of Methylene Blue Using Photocatalytic Materials
… solution. However, photocatalytic slurry reactors are hindered by solution turbidity, dissolved salt content, and absorbance of light. Research presented here introduces two novel engineered material combinations which immobilize the photocatalyst for effective and sustainable degradation …
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