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 21 for “"batch test"”.
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Evaluation of batch test for measurement of active biomass in activated sludge mixed liquor
Over the past two decades significant advances have been made in the areas of engineering (design) and technology (implementation and operation) of the single sludge activated sludge system. Activated sludge systems have been successfully designed and implemented at full-scale for the biological …
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Batch test for measurement of ordinary heterotrophic organism active biomass in activated sludge mixed liquor
To aid the design and operation of the single sludge activated sludge system, over the past three decades a suite of steady state design models (e.g. WRC, 1984; Wentzel et al., 1990; Maurer and Gujer, 1994) and kinetic simulation models (e.g. Dold et al., 1980, 1991; Van Haandel et al., 1981; Henze …
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Measurement of composition of organic constituents of municipal wastewater for plant-wide modelling
… and the performance evaluation of a simple batch test method for the determination of organic compound elemental compositions over a standard WWTP incorporating primary settling, an AS reactor as well as primary sludge and WAS anaerobic digestion. A simple anaerobic batch test approach …
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Measurement of composition of organic constituents of municipal wastewater for plant-wide modelling
… and the performance evaluation of a simple batch test method for the determination of organic compound elemental compositions over a standard WWTP incorporating primary settling, an AS reactor as well as primary sludge and WAS anaerobic digestion. A simple anaerobic batch test approach …
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Field investigation and simulation of nutrient control in a fish-hatchery wastewater stabilization pond system
The aquaculture sector has been the fastest growing animal food producer since the 1970’s. With such a fast growth rate, ecological problems have arisen due to the lack of ability to control nutrient run off in coastal systems. Conversely, land-based fisheries provide an ecologically sustainable …
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Modelling an SBR waste treatment system.
The sequencing batch reactor (SBR), developed from batch reactor technology, has made significant progress in the past two decades with increasing use in wastewater treatment. However, there are still some important aspects of the system that need improvement. Modelling SBR system, developing lab …
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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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Modelling the influence of the froth phase on recovery in batch and continuous flotation cells
… only be achieved by using data obtained from a batch flotation cell. A batch flotation cell has a distinct advantage of being suitable for generating, rapidly, large amount of data. However, the non-steady behaviour of froths found in this type of cell require a robust methodology for extracting …
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Aerobic digestion of waste activated sludge from biological nutrient removal activated sludge systems
… sludge (AS) systems was carried out under batch conditions to (1) measure changes in nitrogen and phosphorus concentrations in solid and liquid phases during aerobic batch digestion tests (2) simulate the parent system with Activated Sludge Model No. 2 (ASM-2) in AQUASIM computer program to …
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Causes and control of low F/M bulking in long sludge age nutrient removal activated sludge systems
… was measured in activated sludge with aerobic batch test procedures. ( 4) Application of the biochemical model to filaments and floe-formers allowed the formulation of a biochemical/microbiological (bulking) model to describe the prolific growth of filamentous organisms. The model was tested …
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Evaluating the impacts of an urban catchment on water and sediment quality of a receiving river
… and benzo(a)pyrene. Laboratory batch test experiments which focused on evaluating the release of metals from field sediments were undertaken to better understand the relationship between sediment and the overlying water column. Substance flow analysis (SFA) was then applied to …
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AN EXPERIMENTAL INVESTIGATION INTO THE EFFICIENCY OF FILTER MATERIALS FOR PHOSPHATE REMOVAL FROM WASTEWATER
… identify their characteristics, and conducting a batch test and constructing a lab-scale upflow filter to investigate the filter materials’ affinity to phosphate. Based on the phosphate removal efficiency and characteristics of selected materials an innovative and sustainable coating technology …
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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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Characterization of municipal waste waters
… COD. From a review of the literature on existing tests to quantify the COD fractions, it was evident that the existing procedures are either too elaborate or approximate or sometimes not even available. This research project addresses these deficiencies. In this research project, the principal …
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Geochemical and mineralogical impacts of sulfuric acid on clays between pH 5.0 and -3.0
… clear. To address this deficiency a series of batch and diffusion cell studies, investigating the geochemical and mineralogical impacts of H2SO4 solutions (pH 5.0 to -3.0), were conducted on three mineralogically distinct clays (Kc, Km, and BK). Batch testing was conducted at seven pH …
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Probing structure-property relationships of calcium hydroxyapatite defluoridation to enhance performance
… HAP sample under investigation. Comparison with batch test F- removal revealed uptake far exceeding the adsorption capacity, thereby indirectly validating the occurrence of F- internalization. Rietveld refinement of X-ray diffraction patterns yielded apatite unit cell parameter values a and c. …
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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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Developing quantitative approaches to determine microbial colonisation and activity in mineral bioleaching and characterisation of acid rock drainage
… generation. Reagent limitation in the system was tested and validated through varying the O2 availability in the IMC vial by air displacement with CO2 and N2 gas, with the systems containing less O2 showing limited activity. Collectively the data showed that high activity, facilitated microbially, …
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Strengths and limitations of bioretention sorbent amendments to simultaneously remove metals, PAHs, and nutrients from urban stormwater runoff
… (ACY) and naphthalene (NAP)). First, batch studies were used to investigate the sorption capacities, kinetics, and the effects of different water quality parameters on sorbents performance. Then, a long-term vegetated column study was conducted to investigate the performance of three …
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The Effects of Temperatures on System Performance and Bacterial Community Structure in a Biological Phosphorus Removal System
… competition in favor of the PAOs. A series of batch test experiments revealed that despite similar acetate utilization by the sludges grown at the two temperatures nearly 30% less PHA was produced by the sludge taken from the 20°C reactor, indicating that GAOs were a small fraction of the …
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