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 29 for “"Material recovery"”.
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Modeling and design of material recovery facilities : genetic algorithm approach
… Given this scenario, effective treatment and recovery of wastes becomes a priority. In developed countries, MSW is usually sent to materials recovery facilities (MRFs), which use mechanical and manual sorting units to extract valuable components. In this work, we define a network flow model to …
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Reverse logistics and large-scale material recovery from electronics waste
… the development of cost-effective, nation-wide material reclamation networks. This thesis project investigates typical and conformational tendencies of a hypothetical end-of-life electronics recycling system based in the United States. Optimal waste processor configurations, along with cost …
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Modeling of material recovery facility performance with applications for life cycle assessment
… waste must be sorted, however, before individual materials can be reprocessed for recycling. Material recovery facilities (MRFs) use a series of mechanical and manual sorting steps to separate the mixed stream of materials. The ability of MRFs to correctly sort materials is therefore a critical …
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Critical Material Recovery from Salt-Lakes and Spent Batteries with Membranes and Solvents
The sustainable extraction and recovery of critical metals such as lithium, cobalt, and rare earth elements are essential for advancing renewable energy technologies, electric vehicles, and modern electronics. This thesis addresses the significant environmental, economic, and logistical challenges …
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Holistic modeling and evaluation of material recovery from materially-complex end-of-life vehicles
Material recovery is a key lever to promote a sustainable materials recycling system. By capturing materials from end-of-life products and substituting primary with secondary material production, society can reduce the depletion of natural resources and prevent the accumulation of valuable …
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Material Recovery Potential from Solar Photovoltaics: Predictive Modeling and Characterization to Advance the Circular Economy
… capacity will increase the value of key raw materials, underscoring the importance of recycling and movement toward a “circular economy”. However, uncertainties over the quantity and the exact material composition of solar panel waste hamper investments by recyclers, manufacturers, and …
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All a diversion? : evaluating progress toward a Zero Waste goal in Los Angeles and New York City
… to a closed-loop system where materials are reused continuously, Zero Waste advocates aim to conserve resources, protect health through material recovery, and improve the equity of material distribution. While the philosophy of Zero Waste is often commended for its comprehensive …
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Materials Recovery Facilities in the United States Virgin Islands: A Regional Facilities Location Model Study
… a network of islands. A series of hypothetical material recovery facilities (MRF) location scenarios were studied using actual and projected data obtained for the three-island territory of the U. S. Virgin Islands. In all cases, a significant reduction in capital construction expenditures was …
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Economics of end-of-life materials recover : a study of small appliances and computer devices in Portugal
… electronic products, and the criticality of the materials these devices contain, present an opportunity for maximizing the economic and societal benefits derived from recovery and recycling. Small appliances and computer devices (SACD), including mobile phones, contain significant amounts of …
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Finite element modeling of cutting and burnishing processes at micro- and nanoscales
… as the uncut chip thickness changes, due to the material strengthening. All these phenomena are hard to describe analytically. Thus, finite element analysis is utilized to numerically model the micro/nano cutting and micro/nano burnishing processes. The coupled Eulerian-Lagrangian method is used …
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The Material Separation Process for Recycling End-of-life Li-ion Batteries
… transportation, deactivation, disassembly, and material recovery. This study focused on the disassembly step and proposed a systematic method to recover cathode active coating, which is considered the most valuable component of a LIB, from end-of-life LIB pouch cells. A semi-destructive …
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Optimal and intelligent decision making in sustainable development of electronic products
… BOL management of products by means of product/material recovery to decrease environmental impacts, the concepts of design for environment and sustainable development are investigated. Based on Sustainability Target Method, a sensitivity analysis decision-making method is proposed. It provides a …
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Towards an integrated recycling system : analyzing two scenarios of informal recycling sector performance in Mumbai, India
… dynamics by developing formal systems known as Material Recovery Facilities (MRFs). Scholars and practitioners are positive about the potential of these decentralized recycling processing facilities for improving the sorting of recyclable materials in urban areas. However, the effects of …
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Re Fuse: Place, material, nature
… humankind has caused in the search of virgin materials (Mining) and burying of used materials (Landfill). Essentially the project is about an analysis of a site and its context and through this analysis identifying a position and a response in the potential utilization of architecture as a …
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What is measured is managed : statistical analysis of compositional data towards improved materials recovery
As materials consumption increases globally, minimizing the end-of-life impact of solid waste has become a critical challenge. Cost-effective methods of quantifying and tracking municipal solid waste contents and disposal processes are necessary to drive and track increases in material recovery and …
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Multiaxial Fatigue Life Extension of Steel Elements Using Shape-Memory Alloy/Carbon Fiber-Reinforced Polymer (SMA/CFRP) Patch
… and loading conditions was conducted. A suite of material, recovery force, and pullout tests supported the program. Surface characterization tests informed the evaluation of the grit blasting and power tool cleaning surface preparation methods. Experimental results suggested that the fatigue life …
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The kinetics and mechanisms of the oxidation and precipitation of iron : the high density sludge (HDS) process
… mixed sludge, thus diminishing chances for waste material recovery, reuse or recycle. In view of the above problems, the objectives of the present study were; to gain more understanding of the oxidation and precipitation reactions of iron through investigating the effect of pH on the oxidation …
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Why Landfills Endure: Quantifying economic barriers to material and energy recovery from municipal solid waste in the United States
… solid waste (MSW) is a heterogeneous mixture of materials discarded by residential and nonresidential generators at end-of-life processing facilities for treatment and disposal. Conventional treatment methods reduce waste volumes through recycling via material recovery facilities, energy recovery …
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Modeling the Adoption Decision Process of Future Scanning and Optimizing Technology in Hardwood Sawmills
… optimizing technology were rated. Improved raw material recovery and increased lumber revenues were the two most highly rated factors. Accuracy of grading was the most highly rated factor for automated grading systems. The adoption decision model found that production related issues were most …
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End-of-life analysis of nanotechnology products
… melting point and specific heat capacity of nanomaterials may be higher than that of their corresponding bulk materials. The melting point elevation and specific heat capacity enhancement of nanomaterials may result in increased energy consumption and waste gases emission at the end-of-life (EOL) …
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