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 115 for “"Alum"”.
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Management of Alum-Treated Poultry Litter
… has shown that treatment of poultry litter with alum is an effective management strategy to reduce phosphorus (P) solubility in litter thereby reducing potential P losses to surface runoff after surface applications. However, limited data are available evaluating alum-treated poultry litter …
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Groundwater effects of land applied alum residuals
… Peawick and Slagle soils had various amounts of alum residuals, lime and plant nutrients incorporated into the topsoil. A weekly dose of rainwater was applied to each column over a six month period. Leachate and soil constituents were analyzed to evaluate migration of specific constituents from …
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An assessment of cropland application of alum sludge
… research has shown that crop land application of alum sludge can be a valuable method of residuals disposal and has been demonstrated to cause no adverse effects on soil properties and crop yields. Studies have shown that with good soil management practices essential plant macronutrient levels can …
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Long-term effects of alum sludge application to land
Previous research relating to alum sludge land application has primarily been restricted to laboratory studies of short-term environmental effects. In general, most research has concluded that the environmental effects of alum sludge constituents can be easily controlled. This study investigated …
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Alum treatment of caustic wash from chlorine bleached kraft pulp
… was to continue the color reduction study of alum treatment of caustic wash from chlorine bleached kraft pulp, to determine if a double tray Dorr thickener could be used to settle the coagulated waste, and to determine if a centrifugal separator could be used to dewater the sludge from the …
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Colloid Formation Resulting from Alum Coagulation of Organic-Laden Sourcewaters
… dissolved-solid phase separation resulting from alum coagulation under the following sourcewater conditions: pH, initial NOM concentration, initial turbidity, and temperature. The solid phase was partitioned into two operationally defined size fractions; colloidal matter was defined as organic …
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Rockbridge Alum Springs: a history of the spa: 1790-1974
This history of the Rockbridge Alum Springs near Lexington, Virginia, covers the entire development of the spa from 1790 through its rapid growth and popularity in the nineteenth century, its final death in 1919, its restoration in the 1940's, and its present state in the 1970's. The Cult of the …
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Removal of complexed iron by chemical oxidation and/or alum coagulation
… the coagulation of dissolved organic matter with alum. A high degree of ferrous iron complexation occurred with the DOC dominated by higher molecular weight organics. This complexation rendered the iron stable against the addition of each of the oxidants evaluated. However, soluble Fe(II) …
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Optimization of donnan dialysis for alum recovery from potable water treatment residues
Submitted in fulfilment of the requirements for the Degree of Master of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2021.
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Effect of Calcium on Arsenic Release From Ferric and Alum Sludges and Lagoons
… been removed from water by sorption to ferric or aluminum hydroxides can accumulate in residuals to concentrations many times higher than in the source water. The first part of this study evaluates the effectiveness of lime conditioning as a method for immobilizing this arsenic. As the pH is …
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The removal of low levels of poliovirus from water by coagulation with alum
… as water reuse increases. The effectiveness of alum coagulation for virus removal was evaluated using a synthetic water seeded with monodispersed poliovirus LScl. Experiments were done using 10(3),10(4),10(6) Plaque Forming Units (PFU) per liter. A microporous filter concentration technique was …
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The removal of specific molecular weight fractions of trihalomethane precursors by alum coagulation
The influence of alum concentration, pH and the molecular weight of organic substances present in a water were evaluated in regards to the removal of trihalomethane (THM) precursors from a surface water supply, Peak Creek, in southwestern Virginia. Water was coagulated with various doses of alum …
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An alum particle-based platform to enhance and investigate humoral immune responses to immunization
… between pSer- conjugated antigens and aluminum hydroxide (alum) particles in order to mediate slow delivery of antigen from the injection site depot to the draining lymph nodes (dLNs). We optimized this pSer/alum platform for a SARS-CoV-2 RBD antigen and an HIV envelope trimer MD39, …
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Synergy of Alum and Chlorine Dioxide for Curbing Disinfection Byproduct Formation Potential at Central Arkansas Water
… dioxide primary disinfection (CDPD) with alum coagulation. Of the DBPs screened, trichloromethane (TCM) was formed in highest concentration in each source water and treatment scenario. In the DBPFP tests, TCM formation potential decreased on average by 30 and 42% after alum coagulation for …
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The operation of a completely mixed activated sludge pilot plant employing alum addition for phosphorus removal
… plant, using domestic sewage and employing alum as a coagulant in the primary process. Alum addition and flocculation were provided prior to a conventional primary clarification process. The secondary treatment consisted of a combination of the complete-mixed and plug-flow process operated …
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Chemical phosphorus removal from municipal wastewater by the addition of waste alum sludge to the activated sludge system
In many cases, waterworks waste alum sludge is disposed of by discharging it into a stream. In this investigation the disposal of alum sludge to activated sludge systems treating municipal sewage is investigated. The advantage is that it is a better method of alum sludge disposal, and moreover the …
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An evaluation of polyelectrolytes in the chemical treatment of textile mill wastes
… and color reductions) for treatments with alum alone and alum with polyelectrolytes. A univariant search technique was used to optimize the flocculation performance with respect to the three parameters, pH, alum concentration, and polyelectrolyte concentration. The results of the alum …
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Defluoridation of typical eastern Virginia groundwater
… for fluoride. This thesis explores the use of alum and alum and lime for the reduction of fluoride to the MCL or lower. In order to reduce an initial fluoride concentration of 2.1 mg/l to 1.8 mg/l 125 mg/l alum was required, for reduction from 5.5 mg/l to 1.8 mg/l, 415 mg/l alum was needed, and …
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Color removal from pulp and paper wastes by coagulation
… the data collected during this research, either alum or ferric chloride may be used to remove color from pulp and paper wastes. An effluent with final residual color less than 5 color units can be generated using PAC treatment after flocculating certain waste streams with alum or ferric chloride. …
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