Engineering Commons^™

Development Of A Model For Predicting The Vertical Profile Of Ozone Based On Ground-Level Ozone Observations And Cloud Cover, Gi-Dong Kim

Doctoral Dissertations

Ozone formed in a chemical reaction is vertically dispersed and mixed with the ozone mass aloft by turbulent convection due to solar radiation. The mixing height, which depends on the stability of the atmosphere, varies by day/night time and by season of year and is characteristic of season and day and night time from year to year. Ground level ozone is generally the combined result of dynamics of the atmosphere resulted from the turbulent convection in the atmospheric boundary layer (ABL), production and destruction processes such as transport from upper air mass, subsequent transport to the ground, photochemical production and …

The Effects Of Dissolved Oxygen Concentration And Biological Solids Retention Time On Activated Sludge Treatment Performance, Jack Joseph Parker

Masters Theses

A bench scale treatment system with dissolved oxygen (DO) control was used to determine the effects of DO concentration and biological solids retention time (BSRT) on treatment performance using the activated sludge process. The four reactors, operating at BSRTs of 20, 10, 5, and 2 days, were fed settled municipal wastewater collected from the Kuwahee wastewater treatment plant in Knoxville, TN. The DO was maintained at different set points in each reactor ranging from 4.0 to 0.2 mg/L.

Experimental results indicate that carbon treatment performance improved, on average, with increasing BSRT but DO had little effect on carbon oxidation. Sludge …

Evaluation Of Poroton Masonry And Suggestion For Quick Design Procedure, Michael R. Radcliffe

Masters Theses

Poroton masonry units are highly cored extruded clay units with numerous thin webs. They have ground surfaces and are laid on a thin fluid mortar bed, with no mortar in the head joints. They offer the advantages of quick construction, which can be performed by a general labor force.

This thesis describes the results of component and prism testing of Poroton masonry. Compressive strength tests occurred on individual units and on prisms constructed with two units in accordance with the manufacturer’s directions. The average unit compressive strength was approximately 2900 psi. The average prism compressive strength was about 900 psi. …

Arsenic Removal For Small Drinking Water Treatment Systems: A Multimedia Cd-Rom For Drinking Water Professionals, Greg A. Harrison

Masters Theses

This thesis, in conjunction with the accompanying CD-ROM, are intended to be used by small public water system operators, owners, regulators, and engineers as an educational tool for future compliance with a lowered Arsenic Maximum Contaminant Level (MCL). The CD-ROM is the third in a series of water treatment technology CDs that were created by a collaboration of Dr. R. Bruce Robinson, the University of Tennessee, and Dr. M. Robin Collins, the Water Treatment Technology Center, the University of New Hampshire. The CD-ROM includes multimedia tools such as video and photos, which will aid in the understanding of the included …

Data Analysis And Correlations For The Particulate Matter Continuous Emission Monitoring System Test Program At The Tsca Incinerator, James A. Calcagno, Iii

Masters Theses

A field study was conducted to evaluate the performance of three commercially available particulate matter (PM) continuous emission monitoring systems (CEMS) during 1999-2000 at the U.S. Department of Energy (DOE) Toxic Substance Control Act (TSCA) Incinerator located near Oak Ridge, Tennessee. The incinerator is permitted to treat mixed-waste, Resource Conservation Recovery Act (RCRA) hazardous and nonhazardous waste, and wastes containing polychlorinated biphenyls (PCB). The mixedwaste treated at the incinerator contains both low-level radioactive and hazardous chemical constituents. The air pollution control system of the incinerator utilizes Maximum Achievable Control Technology (MACT), which is comprised of a rapid quench, venturi scrubber, …

Stormwater Management In Tennessee: Guidelines To Preventative Maintenance Practices And Improvements, Jacob S. Chandler

Masters Theses

The management of urban stormwater runoff is an important issue throughout Tennessee as urban development keeps expanding. With the rise of urban development, there is an ever-growing need for urban stormwater management systems and facilities which are built to protect downstream property owners from potential flood damage as well as to manage and control the increased stormwater runoff. However well-designed a drainage system or facility might be, adequate maintenance is vital for it to function as intended by the design engineer.

This thesis was written to serve as a document that provides information needed to support an effective maintenance program …

Evaluation Of Alternatives For Hydraulic Design Of Bridges With Hec-Ras, William Wesley Peck

Masters Theses

On average, flooding causes over five billion dollars of damage and 99 fatalities per year in the United States alone. These ever-increasing numbers indicate a need for rigorous design procedures for any structures which exacerbate flood risk. The U.S. Army Corps of Engineers Hydraulic Engineering Center (HEC) has developed a computer program called River Analysis System, and more commonly referred to as HEC-RAS or RAS.

HEC-RAS is the best and most recent method for hydraulic design of bridges, and available documentation provides guidance for its use. The author is experienced in hydraulic design of bridges and has developed this thesis …