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 23 for “"sand filtration"”.
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Filter as Metaphor: The McMillan Sand Filtration Site
… of the population they served. The McMillan sand filtration system is a testament to late 19th century engineering and public works design. With the advent of new technologies and growing population, a new, more cost effective, and faster filtration system was built to replace the old slow …
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Household scale slow sand filtration in the Dominican Republic
Slow sand filtration is a method of water treatment that has been used for hundreds of years. In the past two decades, there has been resurgence in interest in slow sand filtration, particularly as a low-cost, household-scale method of water treatment. During January 2004, the author traveled to …
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From design to implementation : innovative slow sand filtration for use in Developing countries
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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Treatment of Wet Fish Sludge with Vermicomposting
… methods were tried by many researchers like sand filtration method, recirculating aquaculture system, intermittent filtration methods. The most of the industries use sand filtration methods for treating aquaculture wastewater and the problems associated: the reduction in hydraulic …
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Investigación sobre eliminación de sales metálicas por procedimientos avanzados
… The advanced processes using membranes (microfiltration, ultrafiltration, nanofiltration and reverse osmosis) form a group of adequate and modular technologies, with different energy requirements, that don’t change the characteristics of the substances separated or concentred. Ultrafiltration …
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Treatment of post hydrothermal liquefaction wastewater and suitability for hydroponic lettuce production
… nexus in junction with food production and water filtration using the wastewater from the process. This aqueous byproduct of the HTL process, post-hydrothermal liquefaction wastewater (PHWW), has the potential to be used as a means of providing nutrients and water to crop production systems. In …
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The development of an ancillary textile industry waste treatment process
… of neutralization; flocculation; sedimentation; sand filtration of the sludge; and atmospheric drying of the sludge.
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Revealing the Grid
… build anew? One such ruin is that of McMillan Sand Filtration Plant in Washington DC. A completely utilitarian structure, with a huge grid of columns covered with a roof spread over 25 acres of land. What appears from the eye level as a 25 acre lawn with a grid of manholes, interspersed with …
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Cryptosporidium sp. and Giardia sp. in the St. Lawrence River: Impact on drinking water quality.
… of the water, including alum coagulation, rapid-sand filtration and chlorination, while the other two used a one-step chlorination process to treat the drinking water. Each site was sampled three times between July and November 1995, and a further 5 to 7 times between April and October 1996. …
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Effect of varying operational parameters on the drainability of freeze conditioned chemical sludges
… Specific resistance testing and gravity sand filtration and refiltration studies were used to determine the drainability of unconditioned and freeze conditioned samples. Unconditioned sludge was characterized by testing for total and total suspended solids, total volatile and total …
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The Thickness of Landscape, horizontally and vertically considered
The McMillan sand filtration plant in Washington, D.C. is a significant industrial landscape that provided safe clean water to much of the capital during 1905-1985. At the outset, the McMillan Commission chose to make the plant and adjacent McMillan reservoir part of the park system it was mapping …
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Biosand filtration of high turbidity water : modified filter design and safe filtrate storage
… that was investigated in this research. Biosand filters, based on an intermittent slow sand filtration process, are an established household scale water treatment technology widely used in developing countries to treat low turbidity drinking water. This research investigates modifications to …
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The microbial biochemistry of slow sand filters.
… of Scotland produces potable water by using slow sand filtration. This method of potable water production involves raw water percolating through a porous sand bed allowing the removal of particles by a combination of physical and biological mechanisms. The unique feature of slow sand filters is …
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Pilot study of horizontal roughing filtration in northern Ghana as pretreatment for highly turbid dugout water
… their physical and microbial contamination. Slow sand filtration (SSF), a low-cost technology for treating microbial contaminated drinking water is only recommended for water < 50 NTU. Two research objectives were established to address this issue; to characterize dugout particle sizes and …
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The Effectiveness of Multiple Redox Treatment Strategies on the Treatability of a High Strength Industrial Wastewater
… to achieve the effluent goal of 100 mg/L as COD. Sand filtration followed by granular activated carbon adsorption treatment of the effluent from the synthetic wastewater-fed ANA SBR provided the COD removal necessary to achieve the effluent goal.
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Biological and Membrane Treatment Applications for the Reduction of Specific Conductivity and Total Dissolved Solids in Coal Mine Waters
… The technologies examined in this study were nanofiltration membrane technology and biological sulfate reducing bioreactors. In the nanofiltration study, three different nanofiltration membranes were evaluated for SC reduction: NF270, DK, and NFX. The DK and NFX nanofilters were able to reduce SC …
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Capturing Stormwater Nitrate and Phosphate with Sorptive Filter Media
… in drinking water. This research shows that sand filters mixed with 5% iron filings captured, on average, 88% of the influent phosphate in laboratory experiments. Neither incorporation of iron filings into a sand filter nor capture of phosphate had a significant effect on the hydraulic …
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Think water : reconditioning the Malden River
… quality, origin, and renewal. The selected site, sandwiched between the towns of Medford and Everett, is chosen to celebrate and demarcate the origin of the river, and second to rejuvenate the water front and surrounding industrial landscape, which is overgrown and polluted. These intentions are …
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Iron oxide amended biosand filters for virus removal
… if the addition of iron oxides throughout biosand filter (BSF) media would increase virus removal due to adsorption. The proposed mechanism is electrostatic adsorption of negatively charged virion particles to positively charged iron oxides formed during the corrosion of zerovalent iron. …
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