Development Of Pre-Stressed Retrofit Strategies For Mitigating Fatigue Cracking In Steel Waterway Lock Gate Components,
2017
University of Arkansas, Fayetteville
Development Of Pre-Stressed Retrofit Strategies For Mitigating Fatigue Cracking In Steel Waterway Lock Gate Components, Christine Michelle Lozano
Graduate Theses and Dissertations
Lock gates are an important part of the transportation infrastructure within the United States (US), having many economic, safety, and environmental benefits over rail and highway transportation systems. Unfortunately, many existing lock gates throughout the US have reached or exceeded their initial design life and require frequent repairs to remain in service. Unscheduled repairs often increase as gates age, having a local economic impact on freight transport which can create economic ripples throughout the nation. Fatigue and corrosion are key causes of unscheduled service interruptions, degrading lock gate components over time. Additionally, because lock gates are submerged during operation, crack …
Evaluating The Chemical And Biological Stability Of Finished Waters Blended For Direct Potable Reuse In A Simulated Distribution System,
2017
University of Nevada, Las Vegas
Evaluating The Chemical And Biological Stability Of Finished Waters Blended For Direct Potable Reuse In A Simulated Distribution System, Assumption Grimaldi
UNLV Theses, Dissertations, Professional Papers, and Capstones
This work evaluated the impacts of blending several different high grade recycled waters with conventional source waters for direct potable reuse (DPR) applications. Bench-scale laboratory tests were conducted for recycled water-source water blends from four participating facilities that have either considered adopting DPR or have already implemented DPR as a feasible approach to overcome water scarcity. The chemical and biological stability of the finished waters was investigated after pipe rig incubation to simulate the quality of blended waters that had aged in a potable water distribution system. The effects of blend ratio, reclaimed water treatment, and source water quality were …
Life Cycle Assessment In Foundry Sand Reclamation – Comparison Of Secondary Reclamation Processes,
2017
University of Nebraska-Lincoln
Life Cycle Assessment In Foundry Sand Reclamation – Comparison Of Secondary Reclamation Processes, Samuel Keith Ghormley
Department of Environmental Engineering: Theses and Student Research
Foundries represent a significant part of the base of the world’s economy and as a sector are one of the largest consumers of energy and producers of solid waste in the United States. Sand casting foundries use approximately 5-10% of their total energy on sand handling processes. By adding a secondary sand reclamation process, foundries can expect to become more energy efficient as well as reducing solid waste from the foundry. To measure the broader environmental impacts, life cycle assessment (LCA) can be used. The goal of the current research was to examine a medium-sized foundry in the United States …
A Humidity-Controlled Fast Integrated Mobility Spectrometer (Hfims) For Rapid Measurements Of Particle Hygroscopic Growth,
2017
Missouri University of Science and Technology
A Humidity-Controlled Fast Integrated Mobility Spectrometer (Hfims) For Rapid Measurements Of Particle Hygroscopic Growth, Tamara Pinterich, Steven R. Spielman, Yang Wang, Susanne V. Hering, Jian Wang
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
We present a humidity-controlled fast integrated mobility spectrometer (HFIMS) for rapid particle hygroscopicity measurements. The HFIMS consists of a differential mobility analyzer (DMA), a relative humidity (RH) control unit and a water-based FIMS (WFIMS) coupled in series. The WFIMS (Pinterich et al., 2017) combines the fast integrated mobility spectrometer (Kulkarni and Wang, 2006a, b) with laminar flow water condensation methodologies (Hering and Stolzenburg, 2005; Spielman et al., 2017). Inside the WFIMS, particles of different electrical mobilities are spatially separated in an electric field, condensationally enlarged and imaged to provide 1 Hz measurements of size distribution spanning a factor of ∼3 …
Quantifying Effectiveness Of Streambank Stabilization Practices On Cedar River, Nebraska,
2017
University of Nebraska-Lincoln
Quantifying Effectiveness Of Streambank Stabilization Practices On Cedar River, Nebraska, Naisargi Dave, Aaron R. Mittelstet
Biological Systems Engineering: Papers and Publications
Excessive sediment is a major pollutant to surface waters worldwide. In some watersheds, streambanks are a significant source of this sediment, leading to the expenditure of billions of dollars in stabilization projects. Although costly streambank stabilization projects have been implemented worldwide, long-term monitoring to quantify their success is lacking. There is a critical need to document the long-term success of streambank restoration projects. The objectives of this research were to (1) quantify streambank retreat before and after the stabilization of 18 streambanks on the Cedar River in North Central Nebraska, USA; (2) assess the impact of a large flood event; …
Understanding The Linkages Between Urban Transportation Design And Population Exposure To Traffic-Related Air Pollution: Application Of An Integrated Transportation And Air Pollution Modeling Framework To Tampa, Fl,
2017
University of South Florida
Understanding The Linkages Between Urban Transportation Design And Population Exposure To Traffic-Related Air Pollution: Application Of An Integrated Transportation And Air Pollution Modeling Framework To Tampa, Fl, Sashikanth Gurram
USF Tampa Graduate Theses and Dissertations
Rapid and unplanned urbanization has ushered in a variety of public health challenges, including exposure to traffic pollution and greater dependence on automobiles. Moreover, vulnerable population groups often bear the brunt of negative outcomes and are subject to disproportionate exposure and health effects. This makes it imperative for urban transportation engineers, land use planners, and public health professionals to work synergistically to understand both the relationship between urban design and population exposure to traffic pollution, and its social distribution. Researchers have started to pay close attention to this connection, mainly by conducting observational studies on the relationship between transportation, urban …
Hydrogeochemical Investigation Of Recharge Pathways To Intermediate And Regional Groundwater In Cañon De Valle And Technical Area 16, Los Alamos National Laboratory,
2017
University of New Mexico
Hydrogeochemical Investigation Of Recharge Pathways To Intermediate And Regional Groundwater In Cañon De Valle And Technical Area 16, Los Alamos National Laboratory, Brendan W. Brady
Civil Engineering ETDs
In aquifers consisting of fractured or porous igneous rocks, as well as conglomerate and sandstone products of volcanic formations, silicate minerals actively dissolve and precipitate (Eby, 2004; Eriksson, 1985; Drever, 1982). Dissolution of hydrated volcanic glass is also known to influence the character of groundwater to which it is exposed (White et al., 1980). Hydrochemical evolution, within saturated zones of volcanic formations, is modeled here as a means to resolve the sources feeding a perched groundwater zone. By observation of solute mass balances in groundwater, together with rock chemistry, this study characterizes the chemical weathering processes active along recharge pathways …
Pollution Prevention In The Great Lakes Basin: Working With Pulp & Paper Manufacturers,
2017
NY State Pollution Prevention Institute, Rochester Institute of Technology
Pollution Prevention In The Great Lakes Basin: Working With Pulp & Paper Manufacturers, Eugene Park
Journal of Environmental Sustainability
In response to growing concerns over persistent toxic substances in the Great Lakes, new initiatives are in place to address and mitigate pollutant loadings to these large natural waterbodies. With support from the U.S. Environmental Protection Agency and New York Department of Environmental Conservation, the New York State Pollution Prevention Institute (NYSP2I) worked with pulp & paper companies in the Great Lakes Basin in an effort to find solutions to reduce environmental impacts from this industry sector. Based on currently available EPA toolkits, NYSP2I developed and utilized an assessment tool called Lean, Energy, and Environment (LE2). Five different paper manufacturers …
Development Of Artificial Intelligence Approach To Nowcasting And Forecasting Oyster Norovirus Outbreaks Along The U.S. Gulf Coast,
2017
Louisiana State University and Agricultural and Mechanical College
Development Of Artificial Intelligence Approach To Nowcasting And Forecasting Oyster Norovirus Outbreaks Along The U.S. Gulf Coast, Shima Shamkhali Chenar
LSU Doctoral Dissertations
Oyster norovirus outbreaks pose increasing risks to human health and seafood industry worldwide. This study presents an Artificial Intelligence (AI)-based approach to identifying the primary cause of oyster norovirus outbreaks, nowcasting and forecasting the growing risk of oyster norovirus outbreaks in coastal waters. AI models were developed using Artificial Neural Networks (ANNs) and Genetic Programming (GP) methods and time series of epidemiological and environmental data. Input variable selection techniques, including Random Forests (RF) and Forwards Binary Logistic Regression (FBLR), were used to identify the significant model input variables among six independent environmental predictors including water temperature, solar radiation, gage height, …
The Control Of Water Contaminants Assisted By Natural Materials,
2017
University of South Florida
The Control Of Water Contaminants Assisted By Natural Materials, Wen Zhao
USF Tampa Graduate Theses and Dissertations
Natural materials can be used to remove water contaminants by applying proper physical, chemical, and biological water treatment processes. This study involves using natural materials, as they are considered to be more environmentally benign and cost-effective than synthetic materials. This dissertation concentrates on monitoring five major water quality parameters—ammonia, fluoride, turbidity, pH, and fecal indicator bacteria (FIB) —in two major applications where clean water is needed. The focus is on meeting the water quality requirements for each contaminant. The overall objective of this study is to control the levels of ammonia in aquaculture wastewater, and adjust fluoride, turbidity, pH, and …
Selecting Technological Alternatives For Regulatory Compliance Towards Emissions Reduction From Shipping: An Integrated Fuzzy Multi-Criteria Decision-Making Approach Under Vague Environment,
2017
World Maritime University
Selecting Technological Alternatives For Regulatory Compliance Towards Emissions Reduction From Shipping: An Integrated Fuzzy Multi-Criteria Decision-Making Approach Under Vague Environment, Khanh Quang Bui
World Maritime University Dissertations
No abstract provided.
Water, Sanitation, And Citizenship: Perceptions Of Water Scarcity, Reuse, And Sustainability In Valparaiso De Goias, Brazil,
2017
University of South Florida
Water, Sanitation, And Citizenship: Perceptions Of Water Scarcity, Reuse, And Sustainability In Valparaiso De Goias, Brazil, Paola Andrea Gonzalez
USF Tampa Graduate Theses and Dissertations
Access to reliable water and sanitation are two important goals to improve livelihoods around the world. Providing access to improved and safe water resources that are equitable and appropriate to local needs is important to improve sustainability long-term. In addition, framing access to water and sanitation as basic human rights is often used as a rationale in developing new water, sanitation, and hygiene interventions in developing countries around the world. But not all countries consider access to safe water and sanitation as a human right. In the thesis, the politics of improving and investment in water access and sanitation provision …
Modelling Tree Contribution In Susceptibility Analysis Of Shallow Llandslides,
2017
Universidad de Antioquia
Modelling Tree Contribution In Susceptibility Analysis Of Shallow Llandslides, Roberto José Marín Sánchez, Juan Pablo Osorio
Articles
In this paper an assessment of shallow landslides susceptibility in a tropical and mountainous terrain is made. A method that allows to model slope stability over large areas is used. Tree contribution is quantified by means of three parameters: rainfall interception, root reinforcement and tree surcharge. A rainfall interception model is used to determine the rain available for infiltration and its temporal distribution during the simulation. The hydrological models included in TRIGRS are described, which allows to determine the pore water pressure depending on the initial conditions. This pore water pressure is used in the revised infinite slope stability model, …
Enhancement Of Two Passive Decentralized Biological Nitrogen Removal Systems,
2017
University of South Florida
Enhancement Of Two Passive Decentralized Biological Nitrogen Removal Systems, Justine L. Stocks
USF Tampa Graduate Theses and Dissertations
This research evaluates two different Biological Nitrogen Removal (BNR) systems for enhanced nitrogen removal in decentralized wastewater treatment. The first study evaluated the performance of Hybrid Adsorption and Biological Treatment Systems (HABiTS) at the pilot scale with and without stage 1 effluent recirculation. HABiTS is a system developed at the bench scale in our laboratory and was designed for enhanced BNR under transient loading conditions. It consists of two stages; an ion exchange (IX) onto clinoptilolite media coupled with biological nitrification in the aerobic nitrification stage 1 and a Tire-Sulfur Adsorption Denitrification (T-SHAD) system in the anoxic denitrification stage 2. …
A Decision Support Tool For Building Integrated Renewable Energy Microgrids Connected To A Smart Grid,
2017
Department of Process, Energy & Transport Engineering, Cork Institute of Technology
A Decision Support Tool For Building Integrated Renewable Energy Microgrids Connected To A Smart Grid, Damilola A. Asaleye, Michael D. Murphy, Michael Breen
Publications
The objective of this study was to create a tool that will enable renewable energy microgrid (REμG) facility users to make informed decisions on the utilization of electrical power output from a building integrated REμG connected to a smart grid. A decision support tool for renewable energy microgrids (DSTREM) capable of predicting photovoltaic array and wind turbine power outputs was developed. The tool simulated users’ daily electricity consumption costs, avoided CO2 emissions and incurred monetary income relative to the usage of the building integrated REμG connected to the national electricity smart grid. DSTREM forecasted climate variables, which were used …
Microbial Competition In Bioelectrochemical Systems,
2017
University of Massachusetts Amherst
Microbial Competition In Bioelectrochemical Systems, Varun Srinivasan
Doctoral Dissertations
Bioelectrochemical systems(BESs)/ microbial fuel fells (MFCs) are a well-studied potential technology for bioremediation and decentralized wastewater treatment. However, progress has been somewhat stalled at the bench-scale. In well controlled experiments electron recovery is high. In natural environments, wastewaters are complex and anode-respiring bacteria can be outcompeted in the presence of competing microorganisms, leading to a loss in electron-recovery and power production. Furthermore, the cathode of the MFC plays a vital role in providing flexibility for treatment options but is an understudied part of MFCs. Modelling Intracellular Competition in a Denitrifying Biocathode: One potential MFC configuration uses an organic-oxidizing anode biofilm …
Analyses Of Densely Crosslinked Phenolic Systems Using Low Field Nmr,
2017
University of Massachusetts Amherst
Analyses Of Densely Crosslinked Phenolic Systems Using Low Field Nmr, Jigneshkumar Patel
Doctoral Dissertations
A uniform dispersion of reactants is necessary to achieve a complete reaction involving multi-components, especially for the crosslinking of rigid high-performance materials. In these reactions, miscibility is crucial for curing efficiency. This miscibility is typically enhanced by adding a third component, a plasticizer. For the reaction of the highly crystalline crosslinking agent hexamethylenetetramine (HMTA) with a strongly hydrogen-bonded phenol formaldehyde resin, furfural has been traditionally used as the plasticizer. However, the reason for its effectiveness is not clear. In this doctoral thesis work, miscibility and crosslinking efficiency of plasticizers in phenolic curing reactions are studied by thermal analysis and spectroscopic …
Decision Analytical Methods For Robust Water Infrastructure Planning Under Deep Uncertainty,
2017
University of Massachusetts Amherst
Decision Analytical Methods For Robust Water Infrastructure Planning Under Deep Uncertainty, Mehmet Umit Taner
Doctoral Dissertations
Deep uncertainties resulting from climate change, demographic pressures, and rapidly evolving socioeconomic conditions are challenging the way that water planners design and operate large-scale infrastructure systems. Conventionally, water infrastructures have been developed using stationary methods, assuming that the underlying uncertainties can be derived from historical data or experience. However, these methods are less useful under deeply uncertain climate and socioeconomic conditions, in which the future can be substantially different from the past and cannot be expressed by well-defined probability distributions. The recognition of deep uncertainties in long-term water resources planning has led to the development of “decision-analytical” frameworks that do …
Microbial Dynamics And Design Considerations For Decentralized Microbial Fuel Cell Applications,
2017
University of Massachusetts Amherst
Microbial Dynamics And Design Considerations For Decentralized Microbial Fuel Cell Applications, Cynthia Castro
Doctoral Dissertations
The purpose of this dissertation was to assess the practicality of using microbial fuel cells (MFCs) as alternative sanitation systems for wastewater treatment and energy recovery, focusing on identifying key design considerations for treating high strength wastewater and managing alternative metabolic pathways. We evaluated the energetic outputs of a lab-based pilot MFC designed to treat complex organics present in both synthetic feces and municipal wastewater. The pilot MFC produced two energetic products, methane and electricity, when treating two types of complex wastewaters. The energetic products associated with anode respiration and methanogenesis were simultaneously observed and yielded a combined energy ouput …
Mass-Balance Assimilative Capacity Model Of Inniscarra Reservoir,
2017
Technological University Dublin
Mass-Balance Assimilative Capacity Model Of Inniscarra Reservoir, Zeinab Bedri, Ahmed Nasr, Sean Crowley
Conference papers
Wastewater arising from the Coachford agglomeration is treated at the existing Coachford Waste Water Treatment Plant (WWTP). This wastewater treatment facility has a primary treatment only with a design capacity of 450 population equivalent (PE) and it discharges the effluent into the Inniscarra Reservoir. The discharge from Coachford WWTP has been identified by the Lower Lee - Owenboy Water Management Unit Action Plan (WMUAP) as a point source pressure on the waters of the Lower Lee - Owenboy catchment and also as a cause of the strongly eutrophic status of Inniscarra Reservoir water quality by the EPA in 2009. Therefore, …
