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 233 for “"Potable water"”.
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Prioritization of Potable Water Infrastructure Investments on the Navajo Nation
… greatly in part by the lack of an adequate potable water infrastructure which has resulted in health disparities and has attributed to stunted economic growth within the Nation. Large candidate regional water transmission pipelines projects aimed to meet these needs have been identified. …
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Non-Uniform Copper Corrosion in Potable Water: Theory and Practice
While it has long been known that water flow can influence non-uniform corrosion of copper pipe (Rushing 2002, Marshall 2004), it has never previously been considered a primary contributor to the problem. This work is the first to describe a fundamentally important phenomenon in aqueous non-uniform …
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Determination of the Influence of Polyurethane Lining on Potable Water Quality
The corrosion of the drinking water distribution system is a serious problem in the United States. The annual cost to repair damages related to corrosion for public utilities in the United States are estimated at $22 billion. Polyurethane can be used as an in situ pipe liner which reduces the …
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An Evaluation and Pressure-Driven Design of Potable Water Plumbing Systems
Potable water distribution systems are broken into major and minor distribution networks. Major water distribution networks refer to large-scale municipal pipe systems extending from the treatment plant to the upstream node of the water service line for buildings. Minor water distribution systems, …
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MEASURING AND MODELING POTABLE WATER DEMAND IN THE UNITED STATES VIRGIN ISLANDS
… and model-based approach to measure and estimate potable water flows in the United States Virgin Islands (USVI). The USVI potable water system is considerably more complicated than typical systems in the mainland United States. For this reason, we conduct a first-principles analysis on water …
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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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Quantifying the potential for potable water savings in the Liesbeek River catchment
The security of South Africa’s water resources has been identified as a major issue affecting the country’s potential for socio-economic expansion. With the realisation that current water management interventions require significant improvement, there has been growing interest in finding more …
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Insights Into Non-Uniform Copper and Brass Corrosion in Potable Water Systems
Non-uniform corrosion of copper and brass in potable water systems poses both economic and environmental problems associated with premature plumbing failures and release of metals. With respect to copper pitting corrosion, it was found that forensic testing (i.e., in pipe-loops) is the only …
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Risk-based Renewal Prioritization Models (RPM) for Potable Water Pipeline Infrastructure Systems
Water pipelines are critical infrastructure assets buried across the United States, responsible for delivering safe drinking water at adequate pressures from source to customers. A majority of these pipelines were installed in the mid-twentieth century without adequate financial planning for future …
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Development of Soluble Manganese Sorptive Contactors for Enhancing Potable Water Treatment Practices
Without proper removal at a water treatment facility, the soluble manganese (Mn) concentration can reach and exceed the Secondary Maximum Contaminant Level (SMCL) of 0.05 mg/L in the water distribution system. At this level, soluble Mn can be oxidized to solid Mn-oxide particulates, leading to …
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Evaluating localized electrochlorination systems as a low-cost means of producing potable water
… decentralized sodium hypochlorite production for water treatment. Methods: Investigations on operational parameters, usability, cost-effectiveness, and impact on water quality were conducted within diverse settings, encompassing hospitals, community water tanks, and schools in Sub-Saharan African …
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Galvanic Lead Corrosion in Potable Water: Mechanisms, Water Quality Impacts, and Practical Implications
As stagnant water contacts copper pipe and lead solder (simulated soldered joints), a corrosion cell is formed between the metals in solder (Pb, Sn) and copper. If the resulting galvanic current exceeds about 2 µA/cm², a highly corrosive microenvironment can form at the solder surface, with pH <2.5 …
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The evaluation of polymeric organic coagulants for potable water treatment by dissolved air flotation
Submitted in fulfilment of the academic requirements for the Degree of Master of Engineering: Chemical Engineering, M. L. Sultan Technikon, Durban, South Africa, 2001.
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Influence of Chlorination and the Distribution System on Mutagens in a Potable Water Supply
Mutagens were recovered from a Central Illinois potable water supply by adsorption on polyurethane foam plugs. Assay of these concentrates with the Ames Salmonella/microsome reversion assay showed both promutagenic and direct-acting responses in TA98. Examination of the water at the groundwater …
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Lead (Pb) Contamination of Potable Water: Public Health Impacts, Galvanic Corrosion and Quantification Considerations
The issue of lead exposure through drinking water was re-examined in light of modern public health goals, recent high-profile cases of elevated lead in water, and emerging concerns regarding the efficacy of legally mandated remedial strategies. A critical literature review revealed that serious …
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The effectiveness of Vhembe District Municipality in the provision of potable water services at Thohoyandou
… Vhembe District Municipality in the provision of potable water services at Thohoyandou. Access to potable water is a fundamental human right and an essential public service, central to health and socio-economic development, as highlighted in recent studies on water justice and governance in …
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Limitations to Use Copper as an Antimicrobial Control of Legionella in Potable Water Plumbing Systems
… Legionella is the leading cause of reported waterborne disease outbreaks in the United States. Legionella can thrive under the warm, stagnant, low-disinfectant conditions characteristic of premise (i.e., building) plumbing systems, making it challenging to identify effective interventions for …
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The feasibility of augmenting the Stellenbosch potable water supply by establishing a direct potable reuse plant
… decade which has placed severe strain on raw water resources for both agriculture and municipal use. The crisis was due to many factors including climate change, increasing urbanisation and ageing infrastructure to name a few. The water scarcity problems will persist in the future globally …
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A comparison of two membrane filter techniques for the enumeration of total coliforms in potable water
… (E-MF) involved the incubation of a filtered water sample on lauryl tryptose plus 1.5 per cent agar for two hours at 35°C prior to transfer of the filter to LES-Endo agar and a final incubation for 22 hours at 35°C. A single incubation of the membrane filter for 24 hours at 35°C was employed …
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The effects of fluoride levels in potable water: case studies in the Northern Cape and Mitchell's Plain
Dental caries is a multi-factorial disease that affects everyone irrespective of race, class or gender, however, the burden of the disease is often found in children from lower socio-economic backgrounds. The nature of the disease is such that it can be prevented. Various international studies on …
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