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.
Results
Showing 1 to 20 of 332 for “"Recycle"”.
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Recycle : resource recovery in Belmont Massachusetts
A potential threat to the earth's ecosystem and the people and animals living here is improper disposal of trash. The average American throws away 3.5 pounds of trash daily. While we have focused our concerns on the arms race and other looming and important issues, the day to day levels of trash …
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Recycle Bin: A Collection of Interconnected Sudden Fiction
… fiction, linked together by the appearance of a recycle bin in each story. The introduction and closing essay relate the author's process as a student and a writer.</p>
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Brownfields in China : how Cities recycle industrial land
Since around 2000, China has been experiencing a major shift in its industrial bases. Many cities have been relocating polluting and energy-intensive plants from urban areas to the less-developed periphery. In the summer of 2005, when I started to pay attention to industrial relocation cases in …
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Business plan for the Solar Recycle-o-Sort
There exists much room for growth in recycling participation with almost 1 in every 4 Americans still not recycling at all. In many communities this fraction is significantly higher, with low awareness of the benefits of recycling. A group of MIT students developed a product called the Solar …
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Chemical recycle of polyester waste using novel zwitterionic catalysts
Waste poly (ethylene terephthalate) (PET) from drink bottles wasdepolymerized using novel zwitterionic imidazolium-2-carboxylate salts ascatalysts (or catalyst-precursors) in the presence of ethylene glycol viaglycolysis to give bis(hydroxyethyl)terephthalate (BHET). The influence ofreaction …
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Examination of Silica Removal with Solids Recycle for Reverse Osmosis Pretreatment
… supported the hypothesis that increased solids recycle in a system will enhance silica removal.
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Characterization of a novel laboratory internal recycle reactor for HTFT studies
… fully characterise the Stirred from Top Internal Recycle Reactor (STIRR) by means of a residence time distribution (RTD) study to determine its suitability for catalyst testing for High Temperature Fischer-Tropsch studies. It is required to not only ensure that the reactor behaves as a perfectly …
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Hydraulic Fracturing Water Recycle through Optimal Ultrafiltration and Nanofiltration Membranes System Design
… With these promising results, our process can recycle water for reuse in hydraulic fracturing while minimizing environmental damage due to water contamination. Through this project, we are confident that hydraulic fracking can become a more sustainable process. </p>
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Continuous separation and recycle of homogeneous catalysts in small scale flow system
… in this thesis developed continuous catalyst recycle systems for a metathesis catalyst, a hydrogenation catalyst, and a palladium Buchwald-Hartwig amination catalyst. During the initial stages of designing such small scale catalyst recycle systems, significant technology gaps were identified. …
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Reduce, Reuse, Recycle? An Examination of Factors Influencing Environmental Behavior in Denver, Colorado
<p>Non-recycling and non-composting of municipal solid waste have important natural resource management implications, in that they both reduce energy, water, and raw natural resource use. Responsible waste management also likely has positive climate impacts by virtue of reducing greenhouse gas …
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Maltotetraose production using Pseudomonas stutzeri exo-alpha-amylase in a membrane recycle bioreactor
… has been demonstrated in a membrane recycle bioreactor (MRB). The enzyme was partially purified to a specific activity of 21.5 units/mg protein for use in the reactor system. The effects of four operational variables--concentration of the enzyme, substrate concentration, flux, and …
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The effect of recycle water quality on the flotation of a Platreef ore
… operation approaches where the process water is recycled within the mineral processing plant. The effects of recycling process water are ore specific, i.e., each ore will respond differently to different water chemistries. Little research has been conducted to understand the effect of different …
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Changes in the quality of leafy vegetables and wash water in a system employing wash-water recycle
… immersion washer employing wash-water recycle was tested and evaluated as part of the processing operation at Exmore Foods, Exmore, Virginia. Water constituents and characteristics that were evaluated included BOD, COD, TSS, VSS, pH, color, conductivity, turbidity, and total chlorine …
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Conversion ratios for plutonium recycle in light water reactors: breeding potential in D₂O-H₂O cooled reactors
The conversion properties of close packed, water cooled, plutonium fueled lattices are studied. Lattices with both ordinary water and light-heavy water mixtures are considered. The effects of volume fractions, plutonium concentrations, and heavy water fraction on the neutronics are studied through …
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Fostering a More Sustainable World through Reduce, Reuse, and Recycle: The Role of Perceived Value in a Circular Economy
… I show that consumers value products made from recycled materials more than comparable regular products. I also document why this happens and demonstrate how this affects usage. In essay 2, I investigate the relationship between reuse and product disposal. The circular economy is based on what …
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Starbucks cups : trash or treasure? : an example of facilitated systems thinking assisting stakeholders in designing their own system to recycle take-away cups
… a larger investigation of the emerging system to recycle take-away cups. Results from this study, as well as suggestions for investigation design changes will contribute to and be incorporated in the larger study.
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The effect of the type, size, position and recycle ratio of the anoxic zone on low F/M filament bulking in nitrogen removal activated sludge systems
Filamentous bulking, which causes deterioration in sludge settleability has been shown, in two nation-wide surveys to be a problem of considerable proportions. Poor sludge settleability in the secondary clarifier limits the daily flow and load that can be treated in activated sludge wastewater …
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