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 44 for “"batch tests"”.
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Identification of Wastewater Primary Sludge Composition using Augmented Batch Tests and Mathematical Models
… the BMP test. The proposed AugBMP and AugBSP tests coupled with mathematical bioprocess modelling, provides a powerful tool for determining the composition of the biodegradable organics present in wastewater substrates. The project incorporated a holistic approach which included fabricating …
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Calcium carbonate precipitation kinetics
… ion pairing and ionic strength effects. Both batch and back mixing steady state conditions were studied. The precipitation rate constant was found to be independent of pH, and functionally related to the state of initial supersaturation in the batch tests and the state of supersaturation in …
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Dissolved phosphorus removal in denitrifying bioreactors: field and laboratory studies
… of DRP in woodchip bioreactors using small-scale batch testing with wood species containing varied elemental composition. Nine of the eleven site-years from the full-size bioreactors showed a DRP removal between 2-50% at the edge of the field, corresponding to 0.7-491 g P removed/ha (drainage …
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Optimizing Enhanced Biological Phosphorus Removal at WRRFs: Impact of Low DO Operation and Full-Scale Strategies
… the elimination of metal salt addition in 2023. Batch tests conducted from 2020 to 2024 indicated higher phosphorus release and aerobic uptake rates at lower DOs, even at higher temperatures, while 16S rRNA amplicon sequencing analysis suggested a community shift toward polyphosphate-accumulating …
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Influence of nutrients on the biological phosphorus removal process at high acetate concentrations
… 200 mg/L. Sludge from both systems was used for batch tests determining the kinetics of phosphorus release and uptake and poly-β-hydroxybutyric acid synthesis. Furthermore, the influence of various nutrients were examined during these batch tests. The results of this study confirmed the …
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An Investigation into the bacterial leaching of a gold-bearing pyrite/arsenopyrite ore
… Initially milled run-of-mine ore was examined. Batch tests and a continuous bacterial leach were carried out. Bacterial leaching was successful and 91-93% gold dissolution was attained in four days. The process was not economically feasible when compared to the standard flotation-roasting …
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THE EFFECT OF BIOFILM CARRIER LENGTH ON NITRIFICATION IN MOVING BED BIOFILM REACTORS: AN EXAMINATION OF MIXING INTENSITY, SHOCK LOADINGS, AND PH CHANGES
… A series of variable velocity gradient (G) batch tests was executed to determine the effect of mixing on mass transfer through the biofilms of each media type. High ammonium and variable pH batch tests were also conducted to assess inhibition effects on nitrifiers. Greater biomass was …
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A study of leaching tests for cement stabilised waste
A cement-stabilised waste was subjected to batch, column, and dynamic leaching tests, and the leaching behaviour of arsenic, copper, lead, selenium, and zinc was investigated. Batch tests included the Australian Bottle Leaching Procedure (ABLP, AS 4493.3-1997), Toxicity Characteristic Leaching …
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Evaluation of Macrolide-Lincosamide-Streptogramin B Antimicrobial Resistance at Swine Farms
… in manure amended field soils and in soil batch tests, since land application of swine manure has also been proposed as a possible factor in the environmental development and dissemination of antimicrobial resistance; the levels of MLSB antimicrobials in field soils amended with swine …
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Deriving a rate equation for the removal of manganese from solution using a gas mixture of sulphur dioxide and oxygen
… and each of the operating parameters, batch tests were conducted where one of the operating parameters was varied at a time. The dissolved sulfur species arising from the dissolution of the sulfur dioxide gas were not kept constant during the batch tests due to the high solubility of …
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Dynamic property evaluation of frother
… through frothing test and laboratory flotation batch tests. A new frothing parameter, initial dynamic froth index (IDFI), is proposed to compare the frothability of solvent. IDFI is derived from initial retention time of froth instead of retention time. IDFI is defined as the limiting slope of …
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Prediction of struvite formation potential in Ebpr digested sludge using mass balances, batch precipitation tests, and chemical equilibrium modeling
… centrate is investigated using mass balances, batch tests, and chemical equilibrium modeling with the software MINEQL+.
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Evaluating the potential for improving anaerobic digestion of cellulosic waste via routine bioaugmentation and alkaline pretreatment
… to a non-bioaugmented control condition. Batch tests were conducted to compare the biogas potential of sweet corn processing residues with and without bioaugmentation using a proprietary cellulolytic bioculture. The results indicated that bioaugmentation was beneficial to digestion …
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Physicochemical and biological treatability study of textile dye wastewater
… on several waste streams in continuous flow and batch tests. Batch tests indicated that the combined waste stream did not require the addition of supplemental nutrients for biological treatment and that at least a five day hydraulic residence time (HRT) was needed for maximum color and organic …
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Fate and Treatability of Engineered Nanoparticles in Urban Stormwater
… effects of n-Ag were explored through adsorption batch tests of different media with aqueous solution of various copper and zinc concentrations and analyzed through atomic absorption spectrophotometry. There appeared to be a slight increase in both metal removal rates when n-Ag was present, …
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Kinetics, mass transfer, and mass re-equilibrium for arsenate adsorption on iron oxide-based carbons
… by an in situ extraction with nano-FeAC in both batch and column systems. The overall inter-medium mass transfer resulted in both improved adsorption densities obtained by batch tests and a large bed volume prior to the 10 [mu]g As/L breakthrough at a short empty bed contact time (0.85 min).
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Experimental testing and modeling of partial nitrification at different temperatures
… of partial nitrification in a sequencing batch reactor (SBR) using kinetic models at 35oC; 3- investigating the effect of dissolved oxygen (DO) on nitrification in a sequencing batch reactor (SBR) treating low ammonia wastewater (40 mg N/L) at low temperature (14oC); 4- investigating the …
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The equilibria and kinetics of certain ion exchange systems
… weak base anion resin (Senbrix). The COD kinetic tests were performed using a conductiometric apparatus, while all the inorganic ion studies were performed on a fractional sampling apparatus. The equilibrium isotherms were obtained using batch tests.
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The treatability of a munitions-manufacturing waste with activated carbon
… carbon efficiency. Both short and long term batch tests as well as bench-scale packed-bed granular activated carbon column experiments were performed. Test parameters included the removal of nitroaromatic compounds and color. Results show that treatment of the TNT manufacturing waste from …
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An investigation of temperature effects on denitrifying bacterial populations in a biological nutrient removal (BNR) system
… rates of PHAs was determined. Sacrificial batch experiments were performed to assess the kinetic and chemical trends present in the denitrification process. Mixed liquor from the last anaerobic zone of a pilot scale BNR system was injected into vials. These vials were pre-purged with …
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