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Articles 1 - 30 of 43
Full-Text Articles in Environmental Engineering
2006 Fall Engr333 Project Final Report, 2006 Fall Engr333
2006 Fall Engr333 Project Final Report, 2006 Fall Engr333
ENGR 333
The objective of this project was to demonstrate Calvin’s interest in alternative energy. The development of a short-term plan to implement a demonstration wind turbine and a long-term plan to determine the feasibility of a larger turbine for the future demonstrates this interest. The class was divided into five teams: management, external relations, long-term technology, short-term technology, and campus infrastructure. While each team had its own objectives, everyone worked together to share information and accomplish the overall project goals. This management technique provided necessary structure and simulated an environment typically found in a career environment.
Modeling Long-Term Plutonium Transport In The Savannah River Site Vadose Zone, Deniz Demirkanli
Modeling Long-Term Plutonium Transport In The Savannah River Site Vadose Zone, Deniz Demirkanli
All Dissertations
Improved understanding of flow and radionuclide transport in vadose zone sediments is fundamental to future planning involving radioactive materials. Long-term experiments were conducted at the Savannah River Site (SRS), where a series of lysimeters containing sources of different Pu oxidation states were placed in the shallow subsurface and exposed to the environment for 2 to 11 years. After the experiments, Pu activity concentrations were measured along vertical cores. The distributions were anomalous in nature, with irregular downward migration and unexpected upward migration. Previous studies suggested that surface-mediated, oxidation/reduction (redox) reactions may be responsible for the anomalies. This hypothesis is tested …
A Comparison Of The Zns(Ag) Scintillation Detector To The Silicon Semiconductor Detector For Quantification Of Alpha Radioactivity In Aqueous Solutions, Jennifer Foster
A Comparison Of The Zns(Ag) Scintillation Detector To The Silicon Semiconductor Detector For Quantification Of Alpha Radioactivity In Aqueous Solutions, Jennifer Foster
All Theses
A ZnS(Ag) detector was successfully used in the direct detection of alpha particles from aqueous solutions and the results were compared to the passivated ion implanted planar silicon (PIPS) continuous air monitor (CAM) detector. The ZnS(Ag) detector is recommended for on-line detection of gross alpha radioactivity from high-level liquid waste process streams; however, the detector suffers from limitations due to variations in detection efficiency with alpha energies. The beta and gamma interference did not significantly spillover into the alpha region of interest of the ZnS(Ag) detector which provided absolute detection efficiencies of 7.19 ± 0.13%, 5.37 ± 0.02%, and 4.21 …
Controlling Steam Flood Migration With Air Injection Wells, Rex Hodges
Controlling Steam Flood Migration With Air Injection Wells, Rex Hodges
All Dissertations
Steam flooding is an aggressive remediation technology for removing volatile organic chemical (VOC) sources that slowly dissolve into passing groundwater. Plume concentrations can be reduced, accelerating cleanup, and decreasing plume management costs. Steam injected in wells surrounding the source spreads outward and develops into a front that drives contamination to a system of groundwater pumping wells in the saturated zone and soil vapor extraction wells in the vadose zone. The process can be modeled with the non-isothermal multi-phase flow simulator T2VOC to include operation designs and factors at individual sites.
A pilot field-scale test at the Savannah River Site (SRS) …
2006 Fall Engr333 Project Posters, 2006 Fall Engr333
2006 Fall Engr333 Project Posters, 2006 Fall Engr333
ENGR 333
To demonstrate Calvin’s interest in alternative energy by developing a short-term plan to implement a demonstration wind turbine and a long-term plan to determine the feasibility of a larger turbine for the future.
Procedure To Quantify Biofilm Activity In Carriers Used In Wastewater Treatment Systems, James Bolton, Archana Tummala, Chirag Kapadia, Manoj Dandamudi, Joanne M. Belovich
Procedure To Quantify Biofilm Activity In Carriers Used In Wastewater Treatment Systems, James Bolton, Archana Tummala, Chirag Kapadia, Manoj Dandamudi, Joanne M. Belovich
Chemical & Biomedical Engineering Faculty Publications
A procedure is presented for evaluating and comparing the biological activity of biofilms attached to various biofilm carriers by measurement of the glucose consumption rate. This technique allows for the economical design and selection of small particulate biofilm carriers that will maximize substrate removal when used in industrial-scale fluidized bioreactors. Methods for ensuring reproducible results are described. To support the glucose consumption rate findings, biofilm dry weights were obtained at the conclusion of activity rate experiments, and scanning electron micrographs were taken to evaluate the presence of biofilm and to view surface characteristics. Fourteen different biofilm carriers were evaluated ranging …
Nutrient Recycling: Rural On-Site Wastewater Disposal And Treatment In Can Tho City, Viet Nam, Micah Johnson
Nutrient Recycling: Rural On-Site Wastewater Disposal And Treatment In Can Tho City, Viet Nam, Micah Johnson
Independent Study Project (ISP) Collection
In order to research a topic a holistic perspective is important. Often experiments are performed absent from the environment that is being observed. It is like thrusting one’s hand into an ocean to grope around for a specimen, extract it, and examine it apart from its native habitat. Although this is possible and often primarily the method, to immerse oneself into where one is studying is to increase one’s ability to obtain a more holistic perspective. I have come to believe that the more practical and accurate scientific experiments are a combination of laboratories and on the field. Not only …
2006 Fall Engr333 Project Assignment, Matthew K. Heun
2006 Fall Engr333 Project Assignment, Matthew K. Heun
ENGR 333
In the Fall 2006 semester, I challenged the ENGR333 students to “construct a realistic plan to make a significant impact on the Calvin College campus with electrical power generated from wind resources.”
Customer
The customer for this project was Calvin’s VP for finance Henry DeVries.
Evaluation Of Environmental Carrying Capacity And Application Of The Sustainability Target Method, Chatpet Yossapol
Evaluation Of Environmental Carrying Capacity And Application Of The Sustainability Target Method, Chatpet Yossapol
Dissertations
The environmental carrying capacity (CC) is defined as the capacity of the earth to absorb or tolerate potentially stressful burdens imparted at various scales and locations, that is, to accommodate the ecological stresses without showing permanent damage. The CC can be used as a reference dataset for Life Cycle Assessment (LCA) purposes and as a baseline for other environmental studies.
In this research, a set of impact-oriented U.S. CC is developed for both input- and output-related impacts. CC for eight common impact categories is evaluated: resource depletion, global warming, ozone depletion, acidification, eutrophication, photochemical ozone formation, human toxicity, and eco-toxicity. …
The Impact Of Abiotic And Biogenic Mn Oxide Coatings On Contaminant Mobility, Bioavailability, And Attenuation, Thipnakarin Boonfueng
The Impact Of Abiotic And Biogenic Mn Oxide Coatings On Contaminant Mobility, Bioavailability, And Attenuation, Thipnakarin Boonfueng
Dissertations
Abiotic and biogenic manganese oxide coatings significantly impact the mobility and bioavailability of metals in soils and sediments. While sorption to discrete Mn oxides has been investigated in a number of studies, coatings have not received as much attention. Abiotic nanocrystalline (hydrous manganese oxide (HMO)) and crystalline Mn oxides (bimessite and pyrolusite) coated on montmorillonite were studied for formation, structure, stability, and surface properties. Coatings dominated the clay surface characteristics where the surface charge behaved similar to that of the discrete oxide and the local structure was consistent with the pure oxide phase. Furthermore, in sorption studies, Zn and Pb …
Mansfield Ct: Planning A New Village Center, Maggie Jones, Richard Barringer
Mansfield Ct: Planning A New Village Center, Maggie Jones, Richard Barringer
Planning
The case follows the development of a plan for a new village center in Storrs, the central village of Mansfield, Connecticut. A process that was transparent and inclusive of the community members yielded a plan that gained the approval of the Town, the landowner (the University of Connecticut), and the citizenry. The process relied on the mending of fences, the leadership of key participants, and an innovative strategy that included development of a nonprofit corporation and creative use of grant money. While zoning changes are still in the works, the first stage of building goes forward.
South Kingstown Ri: New Zoning For An Historic Mill, Maggie Jones, Richard Barringer
South Kingstown Ri: New Zoning For An Historic Mill, Maggie Jones, Richard Barringer
Planning
The village of Peace Dale in the town of South Kingstown, Rhode Island, developed around several mills that commenced operations in the 1800s. One mill, known as the Palisades, is still partially active and in excellent condition, but much of its square footage is unutilized. A citizens’ group of artists and business people joined with the mill owners and the town of South Kingstown to develop new zoning regulations to make more flexible the permitted uses for the mill site. The proposed zoning will allow the mill complex to feature a mix of retail, residential, and manufacturing uses, while preserving …
Hillsborough Filter Pilot Project (2006), Stormwater Academy
Hillsborough Filter Pilot Project (2006), Stormwater Academy
BMP Trains Research and Publications
A zeolite filter pilot plant was operated over a 216 day period to evaluate its ability to enhance nitrogen removal from stormwater. When operated at a steady filtration rate of 192 gal/ft2 -day, the zeolite filter was highly effective at removing ammonia, producing an effluent ammonia nitrogen concentration of 0.07 mg/L, and removing 93% of ammonia and 32% of total inorganic nitrogen. A variety of non-steady state experiments demonstrated that the zeolite filter performance was superior to a parallel sand filter under the varying conditions that are common to stormwater management systems. A storm event was simulated by applying a …
Relationships Between Pacific And Atlantic Ocean Sea Surface Temperatures And U.S. Streamflow Variability, Glenn A. Tootle, Thomas C. Piechota
Relationships Between Pacific And Atlantic Ocean Sea Surface Temperatures And U.S. Streamflow Variability, Glenn A. Tootle, Thomas C. Piechota
Civil and Environmental Engineering and Construction Faculty Research
An evaluation of Pacific and Atlantic Ocean sea surface temperatures (SSTs) and continental U.S. streamflow was performed to identify coupled regions of SST and continental U.S. streamflow variability. Both SSTs and streamflow displayed temporal variability when applying the singular value decomposition (SVD) statistical method. Initially, an extended temporal evaluation was performed using the entire period of record (i.e., all years from 1951 to 2002). This was followed by an interdecadal-temporal evaluation for the Pacific (Atlantic) Ocean based on the phase of the Pacific Decadal Oscillation (PDO) (Atlantic Multidecadal Oscillation (AMO)). Finally, an extended temporal evaluation was performed using detrended SST …
Evaluation Of Microbial Diversity In Wetland Through Polymerase Chain Reaction (Pcr) And Restriction Fragment Length Polymorphism (Rflp), Gregory K. Joseph
Evaluation Of Microbial Diversity In Wetland Through Polymerase Chain Reaction (Pcr) And Restriction Fragment Length Polymorphism (Rflp), Gregory K. Joseph
Theses and Dissertations
The diversity of microbial communities in wetlands has not been fully measured. These communities may offer tools to naturally remediate sites polluted with chlorinated compounds. Polmerase Chain Reaction (PCR) and Restriction Fragment Length Polymorphism (RFLP) are genomic techniques that are capable of rapidly characterizing bacteria communities and can provide valuable information about the diversity of microbial communities.
Enhancing Targeted Traffic Enforcement Efforts In Portland, Oregon, Max Coffman, Christopher Monsere
Enhancing Targeted Traffic Enforcement Efforts In Portland, Oregon, Max Coffman, Christopher Monsere
Civil and Environmental Engineering Faculty Publications and Presentations
Enforcement is a key component of any comprehensive traffic safety program, and through a unique effort the Portland Office of Transportation (PDOT) partners with schools, the court system, community groups and the Police Bureau to develop a coordinated citywide program to improve traffic safety. However, like many government agencies, the Police Bureau faces constraints that limit the resources it can devote to traffic safety. In response, PDOT and the Police Bureau’s Traffic Division have instituted a program of Strategic and Focused Enforcement (SAFE) to better allocate limited traffic safety personnel and resources. Using historical crash data, PDOT identified 30 high …
Molecular Characterization Of Wetland Soil Bacterial Community In Constructed Mesocosms, Ethan C. Bishop
Molecular Characterization Of Wetland Soil Bacterial Community In Constructed Mesocosms, Ethan C. Bishop
Theses and Dissertations
The use of wetlands to effectively remediate aquifers contaminated with chlorinated solvents is an emerging technique, which shows high promise. In order to better understand this process and test its legitimacy, a treatment wetland was constructed at Wright-Patterson AFB, Dayton, Ohio and, in a joint effort with Wright State University (WSU), has previously shown the effective removal of PCE. The purpose of this research was to characterize the soil bacterial community, pre-PCE injection, among three wetland plant species from the sedge family (Cyperaceae) within constructed wetland mesocosms and to identify any bacterial dominance. Carex comosa, Scirpus atrovirens, and Eleocharis erythropoda …
Recycling Of Waste Aseptic Packages, Eiman Monir Hamdy
Recycling Of Waste Aseptic Packages, Eiman Monir Hamdy
Archived Theses and Dissertations
No abstract provided.
Control Of Hydrogen Sulfide From Groundwater Using Packed-Bed Anion Exchange And Other Technologies, Camilo Romero Cotrino
Control Of Hydrogen Sulfide From Groundwater Using Packed-Bed Anion Exchange And Other Technologies, Camilo Romero Cotrino
USF Tampa Graduate Theses and Dissertations
Hydrogen sulfide imparts odors and taste to drinking water and can be corrosive to distribution systems. Groundwater sources used to produce drinking water tend to have sulfide concentrations ranging from below 0.1 to over 3 mg/L. Under anaerobic conditions, hydrogen sulfide can be formed from reduction of sulfate and elemental sulfur through chemical or biological reactions. Therefore, to decrease the potential for hydrogen sulfide in water systems, control of all forms of sulfur should be consistent.
Hydrogen sulfide in groundwater can be controlled through conversion or removal mechanisms. Conversion reactions result from chemical or biological reactions that oxidize hydrogen sulfide …
An Analysis Of Indicator Organism Suitability For Lower James And York Rivers, Rhonda Ashonti Ford
An Analysis Of Indicator Organism Suitability For Lower James And York Rivers, Rhonda Ashonti Ford
Civil & Environmental Engineering Theses & Dissertations
The primary objectives of this thesis are (1) determine if the proper indicator organism is being utilized to determine the bacterial water quality in the State of Virginia. (2) If other environmental factors can predict the bacterial water quality. The current indicator organism of choice for bacterial water quality of waters in the State of Virginia is enterococci, for estuarine and brackish waters. E. coli is the indicator organism of choice for fresh waters in Virginia.
The study concluded (1) Enterococci are the best indicator organism for beaches located in the Hampton Roads Harbor and the Lower James River. (2) …
Development Of A Gis Based Infrastructure Replacement Prioritization System; A Case Study, Brian D. Pickard
Development Of A Gis Based Infrastructure Replacement Prioritization System; A Case Study, Brian D. Pickard
USF Tampa Graduate Theses and Dissertations
Maintenance, repair, and replacement of transmission mains and distribution system piping is expected to cost approximately $75 billion over the next two decades to ensure that public water systems are capable of providing the United States with safe drinking water. However, there is a significant gap between the funds available and the projected costs of infrastructure replacement or rehabilitation. Infrastructure Management Systems (IMS) have been developed to assist utilities and decision-makers in determining how to allocate resources for infrastructure. This project utilizes theTampa Water Department (TWD) as a case study to develop a tool for prioritizing infrastructure replacement.
TWD is …
Risk Of Colon Cancer In Hereditary Non-Polyposis Colorectal Cancer Patients As Predicted By Fuzzy Modeling: Influence Of Smoking, Rhonda M. Brand, David D. Jones, Henry T. Lynch, Randall E. Brand, Patrice Watson, Ramesh Ashwathnayaran, Hemant K. Roy
Risk Of Colon Cancer In Hereditary Non-Polyposis Colorectal Cancer Patients As Predicted By Fuzzy Modeling: Influence Of Smoking, Rhonda M. Brand, David D. Jones, Henry T. Lynch, Randall E. Brand, Patrice Watson, Ramesh Ashwathnayaran, Hemant K. Roy
Department of Agricultural and Biological Systems Engineering: Faculty Publications
AIM: To investigate whether a fuzzy logic model could predict colorectal cancer (CRC) risk engendered by smoking in hereditary non-polyposis colorectal cancer (HNPCC) patients.
METHODS: Three hundred and forty HNPCC mismatch repair (MMR) mutation carriers from the Creighton University Hereditary Cancer Institute Registry were selected for modeling. Age-dependent curves were generated to elucidate the joint effects between gene mutation (hMLH1 or hMSH2), gender, and smoking status on the probability of developing CRC.
RESULTS: Smoking significantly increased CRC risk in male hMSH2 mutation carriers (P < 0.05). hMLH1 mutations augmented CRC risk relative to hMSH2 mutation carriers for males (P < 0.05). Males had a significantly higher risk of CRC than females for hMLH1 non smokers (P < 0.05), hMLH1 smokers (P < 0.1) and hMSH2 smokers (P < 0.1). Smoking promoted CRC in a dose-dependent manner in hMSH2 in males (P < 0.05). Females with hMSH2 mutations and both sexes with the hMLH1 groups only demonstrated a smoking effect after an extensive smoking history (P < 0.05).
CONCLUSION: CRC promotion by smoking in HNPCC patients is dependent on gene mutation, gender and age. …
Investigation Of Copper Contamination And Corrosion Scale Mineralogy In Aging Drink Water Distributions Systems, Nadja F. Turek
Investigation Of Copper Contamination And Corrosion Scale Mineralogy In Aging Drink Water Distributions Systems, Nadja F. Turek
Theses and Dissertations
Research has shown higher levels of copper appear in drinking water conveyed through relatively new copper piping systems; older piping systems typically deliver lower copper levels in their drinking water. This research contributes field data from a real drinking water distribution system, providing a better understanding of this phenomenon, as it relates to treatment considerations and compliance with the Lead and Copper Rule. Copper pipes and copper levels were sampled from drinking water taps of 16 buildings with pipes ranging in age from less than 1 to 48 years. Water samples from each building were collected before and following a …
Modeling Study To Quantify The Benefits Of Groundwater Contaminant Source Remediation, David E. Wagner
Modeling Study To Quantify The Benefits Of Groundwater Contaminant Source Remediation, David E. Wagner
Theses and Dissertations
The purpose of this research was to quantify the benefits of groundwater contaminant source remediation by using a model to simulate how reduction of source mass was related to reduction of contaminant concentration at a receptor. This thesis sought to answer three research questions: (1) how are contaminant source mass reduction and reduction of mass flux leaving the source-zone related; (2) how can we quantify the effect of the important natural attenuation processes that act upon the dissolved contaminant as it travels from the source zone to downgradient receptors, and (3) under specified site conditions, what is the maximum contaminant …
Analysis Of Bacterial Population And Distribution In The Developing Strata Of A Constructed Wetland Used For Chlorinated Ethene Bioremediation, Milton J. Clausen Jr.
Analysis Of Bacterial Population And Distribution In The Developing Strata Of A Constructed Wetland Used For Chlorinated Ethene Bioremediation, Milton J. Clausen Jr.
Theses and Dissertations
Chlorinated hydrocarbons and their degradation products are among of the most common organic groundwater contaminates in the United States. These compounds attack the central nervous system in animals and can affect the photosynthesis of plants. These compounds are also resistant to degradation in the environment and, because of this, pose a risk to any ecosystem in which they are present. This study identified the dominant microbial species in a constructed treatment wetland at Wright-Patterson AFB, Dayton, Ohio using 16S rRNA gene sequence analysis. Samples were taken from three different depths and during each of the four seasons. These samples were …
Stormwater Irrigation Volume Ii: Cyanobacteria Counts With Toxin Concentrations In Stormwater Ponds And After Biofiltration To Reduce Health Risks (2006), Martin Wanielista
Stormwater Irrigation Volume Ii: Cyanobacteria Counts With Toxin Concentrations In Stormwater Ponds And After Biofiltration To Reduce Health Risks (2006), Martin Wanielista
BMP Trains Research and Publications
Algal blooms are a common occurrence in water bodies of all shapes and sizes in the State of Florida as well as all other locations around the world. Cyanobacteria, or blue-green algae, have proven to be of special concern due to proliferation and potential to produce toxins that are harmful to humans, livestock and wildlife. Casual observations of lakes and stormwater ponds in Florida will confirm algal conditions in many. The health risks and the potential for exposure to harmful and possibly fatal toxins associated with these algal blooms are becoming more evident as more nutrients are discharged to our …
Stormwater Irrigation Volume I: Evapotranspiration And Nitrate Reduction After Biofiltration To Reduce Health Risks, Martin Wanielista, Ewoud Hulstein
Stormwater Irrigation Volume I: Evapotranspiration And Nitrate Reduction After Biofiltration To Reduce Health Risks, Martin Wanielista, Ewoud Hulstein
BMP Trains Research and Publications
Irrigation of detained stormwater is an option available for volume and pollution control. Volume control is accomplished when detained waters normally discharged from a detention facility are used instead for irrigation. However, a health risk may result if the nitrate in the irrigation water is not attenuated in the plant and soil matrix. The nitrate level in stormwater ponds is generally much less that the health risk specified as 10 mg/L in Drinking water standards. Nevertheless, the fate of nitrate in the soil plant matrix has not been documented. In addition, there are other potential problems associated with not maintaining …
Trees And Ice Storms: The Development Of Ice Storm–Resistant Urban Tree Populations (Second Edition), Richard J. Hauer, Jeffrey O. Dawson, Les P. Werner
Trees And Ice Storms: The Development Of Ice Storm–Resistant Urban Tree Populations (Second Edition), Richard J. Hauer, Jeffrey O. Dawson, Les P. Werner
United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications
Severe ice storms occur every year in the United States and Canada, particularly in the midwestern and eastern regions of the United States. Along with fires and wind, ice storms are a frequent and major natural disturbance factor in eastern deciduous forests. Likewise ice storms are responsible for deaths and injuries of people and cause dramatic damage and tree loss to urban forests. Ice storms annually result in millions of dollars in loss, and potentially billions of dollars in losses for extreme and widespread ice storms. Damage to electric distribution systems, blocked roadways, and property damage from fallen trees and …
A Derivation Of An Empirical Equation For Estimating The Acoustical Shadow Zone Length Of Roadway Noise Barriers, Wayne Arner
A Derivation Of An Empirical Equation For Estimating The Acoustical Shadow Zone Length Of Roadway Noise Barriers, Wayne Arner
Electronic Theses and Dissertations
The objective of this research was to derive an empirical equation that estimates the acoustical shadow zone length (SZL) of roadway noise barriers. The acoustical shadow zone is the area behind a noise barrier of reduced sound levels, generally to some stated level at or near background. The ability to predict the SZL can be used as a method to evaluate the performance, and possibly the design, of roadway noise barriers. The current federally required roadway noise model is the Federal Highway Administration (FHWA) Traffic Noise Model (TNM). TNM uses insertion loss (IL) to evaluate the effectiveness of a barrier. …
Disinfection Of Swine Wastewater Using Chlorine, Ultraviolet Light And Ozone, John J. Macauley, Zhimin Qiang, Rao Y. Surampalli, Melanie R. Mormile, Craig D. Adams
Disinfection Of Swine Wastewater Using Chlorine, Ultraviolet Light And Ozone, John J. Macauley, Zhimin Qiang, Rao Y. Surampalli, Melanie R. Mormile, Craig D. Adams
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Veterinary antibiotics are widely used at concentrated animal feeding operations (CAFOs) to prevent disease and promote growth of livestock. However, the majority of antibiotics are excreted from animals in urine, feces, and manure. Consequently, the lagoons used to store these wastes can act as reservoirs of antibiotics and antibiotic-resistant bacteria. There is currently no regulation or control of these systems to prevent the spread of these bacteria and their genes for antibiotic resistance into other environments. This study was conducted to determine the disinfection potential of chlorine, ultraviolet light and ozone against swine lagoon bacteria. Results indicate that a chlorine …