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Articles 421 - 440 of 440
Full-Text Articles in Engineering
Ozonation Of A Municipal Groundwater Supply To Reduce Iron, Manganese, And Trihalomethane Formation, Richard Alan Stoebner
Ozonation Of A Municipal Groundwater Supply To Reduce Iron, Manganese, And Trihalomethane Formation, Richard Alan Stoebner
Electronic Theses and Dissertations
The purpose of this investigation was to determine the feasibility of using ozonation followed by filtration for removal of iron and manganese and prevention of trihalomethane formation. To avoid disruption of the treatment plant operation, pilot-scale units were used in the investigation. The filter media and filtering rates employed during the pilot studies were identical to those used at the East Water Treatment Plant.
Bearing Capacity Of Eccentrically Loaded Surface Footings On A Sand Layer Resting On A Rough Rigid Base, Roland Dale Maynard
Bearing Capacity Of Eccentrically Loaded Surface Footings On A Sand Layer Resting On A Rough Rigid Base, Roland Dale Maynard
Electronic Theses and Dissertations
The purpose of this investigation is to present the results of some recent laboratory model testing of the ultimate load carrying capacity of eccentrically loaded strip, surface footings on sand, with a rigid base located at varying depths. It is expected that these results will. lend to a better quantatative [sic] understanding of the problems encountered in these situations.
Ground Water Quality Variation At A Rapid Infiltration Land Treatment System Used For Tertiary Wastewater Treatment, Thomas W. Drake
Ground Water Quality Variation At A Rapid Infiltration Land Treatment System Used For Tertiary Wastewater Treatment, Thomas W. Drake
Electronic Theses and Dissertations
Based on the need to monitor nitrates because of the 1977 modifications, as well as upon the original EPA provisions for ground water monitoring, the studies reported in this thesis were initiated. The objectives of this investigation were as follows: 1. To monitor four wells within the influence of the rapid infiltration pilot units, as well as two control wells located beyond the influence of the units, to determine any substantial changes in ground water quality, which might be attributed to the rapid infiltration pilot unit operation; 2. To specifically examine the nitrogen data collected from the perforated drains in …
The Effect Of Potassium Permanganate On The Removal Of Iron And Manganese From Ground Water, Mohammad Reza Farvardin
The Effect Of Potassium Permanganate On The Removal Of Iron And Manganese From Ground Water, Mohammad Reza Farvardin
Electronic Theses and Dissertations
For the past three years or so, a gradual migration of iron and manganese deposits has been observed in the water mains to the west of the East Water Treatment Plant of Brookings, South Dakota. These deposits have been gradually migrating further westward from the plant (8). Routine analyses of the treated water from the East Plant indicate that the iron and manganese levels are within the USPHS recommended limits (9). Consequently, conclusive evidence that this plant is the source of the problem does not exist. However, the analyses are normally conducted on samples collected shortly before backwashing the filters. …
Bearing Capacity Of Surface Footings On A Sand Layer Resting On A Rigid Rough Base, Tom Walter Pfeifle
Bearing Capacity Of Surface Footings On A Sand Layer Resting On A Rigid Rough Base, Tom Walter Pfeifle
Electronic Theses and Dissertations
The purpose of this study is to present the results of some recent laboratory model testing on the ultimate vertical load carrying capacity of rough, rectangular, surface footings which were placed on granular soil. A rigid base was located at limited depths. It is expected that these results will lend to a better quantitative understanding of the problem.
Treatment Capabilities Of A Rapid Infiltration Pilot Unit Treating Stabilization Pond Effluent, Richard G. Seas
Treatment Capabilities Of A Rapid Infiltration Pilot Unit Treating Stabilization Pond Effluent, Richard G. Seas
Electronic Theses and Dissertations
In October, 1972, Congress passed PL 92-500, "Federal Water Pollution Control Act Amendments of 1972 1; which is designed to upgrade the quality of the nation's water. The act requires the formulation of effluent standards that would require use of “best practicable treatment”. The effluent standards are to require use of the "best available" technology by July 1, 1983 (1). PL 92-500 requires the Environmental Protection Agency Administrator to publish information explaining which treatment techniques may be used to meet the requirement of "best practicable treatment". Land application of wastewater has been designated as a viable alternative to traditional treatment …
An In-Plant Waste Survey Of An Egg-Processing Plant, James R. Schultz
An In-Plant Waste Survey Of An Egg-Processing Plant, James R. Schultz
Electronic Theses and Dissertations
The total number of eggs produced.in the United States has increased from 40 billion in 1940 to approximately 70 billion in 196 7 (1-265). It is expected that the demand for processed eggs will increase from ten percent of the total production in the 1960's to over 30 percent in the 1970's (2-805). The increase in use of processed eggs will undoubtedly result in an increase in production wastes. To estimate the water pollution potential of egg wastes and to provide the information necessary for procurement of waste discharge permits, knowledge of the volume, strength and treatability of egg-processing wastes …
Viscoelastic Cylindrical Pressure Vessel With Variable Inner Radius, A. N. Joshi
Viscoelastic Cylindrical Pressure Vessel With Variable Inner Radius, A. N. Joshi
Electronic Theses and Dissertations
The objective of this thesis is to predict from a theoretical basis the stress redistribution processes occurring within the viscoelastic core of a cylindrical pressure vessel reinforced by an elastic casing around the outer perimeter, and subject to internal pressure applied to the time-dependent inner boundary of the cylinder. The problem so stated requires development of a new technique leading to a solution for a mixed boundary value problem for a viscoelastic body occupying an ablating cylindrical y-shaped region. The approach taken in this thesis consists in reduction of a governing integro-differential equation to an equivalent set of algebraic equ3tions …
The Unsteady Circulation Distribution In Rotors And Its Application To Noise Studies, Assem A. Fathy
The Unsteady Circulation Distribution In Rotors And Its Application To Noise Studies, Assem A. Fathy
Electronic Theses and Dissertations
A new method for the calculation of the unsteady circulation distribution in axial flow compressors was developed. The classical assumption of representing the rotor by a two-dimensional infinite cascade was eliminated. Instead the more realistic case of a radial cascade with blades of finite length was studied. The blades were assumed to be thin and only slightly cambered. The flow was assumed ·to be incompressible and inviscid and the secondary flow effects were neglected. The velocity induced at an arbitrary point of a reference blade due to the bound vortices on the blade under consideration and the other blades and …
Quantification Of Pollutants In Surface Runoff From Agricultural Lands In Brookings County, South Dakota, Leland Lester Harms
Quantification Of Pollutants In Surface Runoff From Agricultural Lands In Brookings County, South Dakota, Leland Lester Harms
Electronic Theses and Dissertations
Surface runoff from snowmelt and rainfall was measured 1n eastern South Dakota from seven sites (7.18 to 18.69 acres) during 1971 and 1972. All sites had single crops which included corn, oats, pasture and hayland. All land was farmed under normal farming conditions. Samples were taken periodically throughout each runoff event, and a single composite sample was made from the individual samples for a particular site. The composite sample represented the entire runoff event. The amount of rainfall and the runoff flow were measured. Determinations on the composite sample included total coliform, fecal coliform, fecal streptococcus, soluble pesticides, specific conductance, …
A Simulation Of Sediment Deposit In Open Channels, Tsan-Wen Wang
A Simulation Of Sediment Deposit In Open Channels, Tsan-Wen Wang
Electronic Theses and Dissertations
In this study, two mathematical models have been developed to simulate sediment deposition in open-channel flow; a model based on three characteristic equations and a model based on two characteristic equations. A set of three partial differential equations for one dimensional transient flow with homogeneous density was provided to explain the mechanics of the phenomenon. By the method of characteristics, three partial differential equations were transformed into a set of three ordinary differential equations or a set of two ordinary differential equations by simplification in which the change of sediment layer thickness with respect to distance was assumed to be …
Analysis Of Variation Of River Flow And Water Quality In The White River Basin, Michael Stephen Thompson
Analysis Of Variation Of River Flow And Water Quality In The White River Basin, Michael Stephen Thompson
Electronic Theses and Dissertations
The main objectives of this White River Basin study were to analyze flow variation records, to investigate existing river water quality data as compared with the designated beneficial uses for the basin and to consider the influence of present and future irrigation development. Data were collected from a number of sources and brought together for interpretation with respect to these objectives. The streamflow study utilizes the streamflow records from 10 gaging stations in the White River Basin. It is expected that the results of this investigation may be of assistance to the South Dakota Water Resources Commission and the South …
Computer Simulation Of Unsteady Flow In An Alluvial Channel By The Method Of Characteristics, Dennis Lynn Richards
Computer Simulation Of Unsteady Flow In An Alluvial Channel By The Method Of Characteristics, Dennis Lynn Richards
Electronic Theses and Dissertations
A number of dams have been constructed along alluvial rivers. These dams create reservoirs which serve to collect and store water, usually in large quantity, for use in supplying municipal needs, for supplying power and driving machinery, for furnishing irrigation, and for retaining the flow in time of floods. The characteristics of flow and the sediment-transport capacity of the channel change after these dams have been constructed. One of the major problems then confronting the hydraulic engineer is the rate of reservoir sedimentation and the change in river configuration. A problem of concern is the rapidity of reservoir sedimentation and …
An Evaluation Of An Aerated Lagoon System Treating Combined Dairy And Domestic Wastes During Summer Operation, Douglas M. Skie
An Evaluation Of An Aerated Lagoon System Treating Combined Dairy And Domestic Wastes During Summer Operation, Douglas M. Skie
Electronic Theses and Dissertations
The Water Quality Act of 1965 and the adoption of the subsequent state water quality standards emphasized the general public's concern for the control of water pollution; for it has become the goal of our nation to maintain all American waters in a suitable condition for domestic and industrial supply, for recreation and for other beneficial uses. It is for these reasons that many communities have been faced with the problem of constructing new sewage treatment facilities or expanding present operations. The use of stabilization ponds as a means of providing sewage treatment has been the practice of many small …
Design And Construction Of Earth Dams., Panthragadi Bhyravamurthy
Design And Construction Of Earth Dams., Panthragadi Bhyravamurthy
Electronic Theses and Dissertations
This thesis deals with the design and construction of rolled-fill earth dams with the standard methods of practice, taking the Hirakud Dam as the basis. The field operations of the investigation to obtain observational information and to secure samples for the laboratory testing include observation of rain gauge and river gauge readings, taking river water samples, digging test pits, drilling grout holes, opening drifts, digging borrow pits and conducting detailed topographical surveys. Laboratory tests are conducted on the samples and the results are plotted in graphs. Rainfall and run-off statistics are plotted in graphs. Observational information of geology is plotted …
Studies In Radiant Heat Baking., Edwin F. Schumacher 1912-1966
Studies In Radiant Heat Baking., Edwin F. Schumacher 1912-1966
Electronic Theses and Dissertations
No abstract provided.
The Study Of Relief Map Construction And The Construction Of A Relief Map Of The Mt. Katahdin Area In Maine, Winston Churchill Robbins
The Study Of Relief Map Construction And The Construction Of A Relief Map Of The Mt. Katahdin Area In Maine, Winston Churchill Robbins
Electronic Theses and Dissertations
The project of the construction of a relief map of the Mt. Katahdin area is a step toward the construction of a relief map of the State, by serving to create added interest in such a project and to solve some of the technical problems. The Mt. Katahdin area was chosen for this project because topographical data was available for building a relief map of Maine’s most prominent topographic feature and because of the familiarity of the writer with this section.
Stress Investigation And Design Methods For Composite Beams Consisting Of Concrete Slabs On Steel I-Beams, Hjalmer T. Person
Stress Investigation And Design Methods For Composite Beams Consisting Of Concrete Slabs On Steel I-Beams, Hjalmer T. Person
Electronic Theses and Dissertations
The term, reinforced concrete, as generally used, is applied to that type of construction in which steel rods are imbedded in concrete members. In these members the steel and concrete are considered to act as a unit and both are assumed to be effective in developing the resisting moment of the beam.
A Traffic Survey Of The City Of Sioux Falls, South Dakota, George Everett Thompson
A Traffic Survey Of The City Of Sioux Falls, South Dakota, George Everett Thompson
Electronic Theses and Dissertations
How to control the traffic on the streets of our cities is becoming one of the most important problems of the present day. an urban community depends for its existence upon the transportation facilities both internal and external. The external transportation is necessary for a city's growth because food supplies and raw materials must be brought into the city and the commodities which are produced in the cities must be distributed to other places.
Bridge Survey Practice, R. B. Yule
Bridge Survey Practice, R. B. Yule
Electronic Theses and Dissertations
It is the intention in this paper to outline for general use the information that should be obtained in a survey for a proposed bridge in order that it may be designed with full knowledge of the conditions it must meet satisfactorily in service. The Manuals herein are written for conditions that exist in the Mississippi Basin and particularly the North Central States but will find general application with minor changes.