This study evaluates the selection for partial denitrification (PdN, NO3 NO2) and coupling with anammox as an alternative route of achieving short-cut nitrogen removal at Blue Plains advanced wastewater treatment plant. The use of primary sludge fermentate was evaluated as a cheaper and viable...
The major objective of this research was to investigate the oxygen half saturation coefficients for nitrifying autotrophic bacteria in a mixed culture system and in an individual system for Ammonium oxidizing bacteria (AOB) and Nitrite oxidizing bacteria (NOB), respectively. The oxygen half...
With millions of traffic collisions occurring each year and tens of thousands of these collisions resulting in fatalities, the need to keep improving traffic safety is apparent. One way to accomplish this is to look into traffic simulation models in order to test different traffic situations and...
The main objective of this research program is to evaluate the seismic response of slender reinforced concrete (RC) bridge columns to second order P-Delta effects. This research has led to the development of a new methodology for explicitly addressing P-Delta effects in the seismic design of...
Experimental measurements of nuclear fuel bundle response to seismic loads have primarily been focused on the response of the structure. Forcing methods have included use of shake tables, however, the majority of work has used hydraulic actuators rigidly connected to a single spacer grid to force...
Analysis of bonded reinforced and prestressed concrete members for flexure should be conducted using the strain compatibility approach as stipulated by the ACI-318 design code published by the American Concrete Institute and the AASHTO LRFD Specifications published by the American Association of...
The State of Kuwait is situated at the northwestern end of the Persian Gulf and has a population of 2.5 million people, the vast majority of whom live along the southeastern stretch of its 500 km coastline. Kuwait Bay, a shallow natural harbor situated at the eastern "mouth" of the country, lies...
This dissertation addresses the development of a new approach to assess the inter-relationship among dynamic responses, and their sensitivities and robustness in crash simulation applications. Given inherent uncertainties in the laboratory data and appropriate input parameters of the model, this...
The purpose of this study was to investigate the feasibility of ethanol as an alternate substrate for biological denitrification by measuring various growth kinetic parameters. The growth yield coefficient is measured for endogenous nitrate removal while external carbon substrate is still...
AbstractDevelopment of A Generalized Isotropic Yield Surface for Pressure Insensitive Metal Plasticity Considering Yield Strength Differential Effect in Tension, Compression and Shear Stress StatesDue to effects of twinning and texture evolution, the yield surface for hexagonal close packed (HCP)...
Nowadays, engineers are challenged to provide economic solutions that could be implemented within minimum schedules. Also, higher security levels are in need.One of the most time consuming tasks in a bridge project is the construction of the superstructure. Precast full-depth concrete deck panels...
This dissertation is concerned with the development of a generalized meshfree (GMF) approximation to improve the accuracy and efficiency of conventional meshfree methods in the solid and fracture analysis. The particular focus of the dissertation is placed on both the mathematical and numerical...
Approximately half of all numerical problems in crashworthiness analysis involve impact dynamics, and accurate contact algorithms are critical to capture the structures’ behavior. Conventional contact algorithms use the principle of preventing ‘ slave ’ nodes from penetrating ‘master’ segments....
Deformable crash test barriers used for vehicle crash tests are made of deformable aluminum honeycomb blocks. These aluminum honeycomb blocks have excellent energy absorbing capabilities. They have different crush strengths representing the front end of a vehicle. The finite element models of...