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High-shear and pressure activated sludge treatment : solid-liquid separation

Creator:: Coddington, Charles William
Abstract:: Since the development of the activated sludge process in 1913 many attempts have been made to improve it. One approach has been to increase the oxygen available to the bio-mass. This study combined the use of elevated pressure and high-shear mixing to increase the oxygen transfer. The conventional method of...
Resource Type:: Masters Thesis
Full Text:: activated sludge process for sewage treatment was unchanged for almost 30 years after its development in

Heat utilization in a sewage disposal plant

Creator:: Peterson, Roy Stanley
Resource Type:: Masters Thesis
Full Text:: Gallons sludge per million Perceìtage reioval Bacteria BUD 02 suspended solids gal. sewage consumed

Agronomic biosolids application rates for dryland wheat across a range of northwest climate zones

Creator:: Sullivan, Dan M., Bary, Andrew I., Cogger, Craig G., and Shearin, Todd E.
Abstract:: Predicting agronomic rates is important to derive optimum economic and environmental benefits from biosolids fertilizer applications. We conducted this research to 1) evaluate dryland wheat response to biosolids applications over a range of climate zones in the Pacific Northwest and 2) compare agronomic application rates predicted from yield curves with...
Resource Type:: Conference Proceeding

The effect of elevated pressure on the activated sludge process

Creator:: Godsil, Patrick James
Abstract:: A study of the effect of elevated pressure on the activated sludge waste treatment process is presented. The method of study involved a comparison of two laboratory, batch type, activated sludge units. One unit was operated at atmospheric pressure as a base control and the other operated at elevated pressures...
Resource Type:: Masters Thesis
Full Text:: - tion of settled sewage and seed material from an activated- sludge treatment plant and was acclimated

The effect of elevated pressure and high shear on oxygen uptake rates in activated sludge

Creator:: Streebin, Leale E.
Abstract:: The purification capacity of an activated sludge process is highly dependent of the rate of oxygen transfer from the air to the microorganisms. This rate can be increased in an air diffusion system by subjecting the culture to high shear and high pressure. A study of the effects of high...
Resource Type:: Masters Thesis
Full Text:: . Pasveer, A. Re search on activated sludge. III. Distribution of oxygen in activated sludge floc. Sewage

Determination of fluorinated alkyl substances in aqueous systems

Creator:: Schultz, Melissa M.
Abstract:: Fluorinated alkyl substances, which can be persistent, toxic, and bioaccumulative, have been quantitated in many densely populated and remote regions, including in air, surface waters, groundwater, and biota; however, little is known about their transport or behavior in the environment. Wastewater effluent is one of the principal routes for introducing...
Resource Type:: Dissertation
Full Text:: ; thus, sorption onto sludge can be a removal mechanism of fluorinated alkyl substances from the

Determination of equilibrium partial pressure of ammonia gas above anaerobically digested sewage sludge

Creator:: English, Charles Joseph
Abstract:: A laboratory study of anaerobically digested sewage sludge was performed to measure equilibrium constants for ammonia in the sludge. Measured constants describing the solution and dissociation of ammonia in sludge were compared to theoretical constants obtained from thermodynamic data. No significant difference was found between these two sets of constants....
Resource Type:: Masters Thesis
Full Text:: Gas Above Anaerobically Digested Sewage Sludge AN ABSTRACT OF THE THESIS OF MASTER OF CHARLES

Biosolids Increase Grass Yield, Grass Quality, and Soil Fertility in Dryland Pasture

Creator:: Sullivan, Dan M.
Abstract:: The purpose of this report is to document changes resulting from long-term application of biosolids to grazed dryland pasture. The report contains two chapters: • Chapter 1: Biosolids Increase Grass Yield and Quality in Dryland Pasture • Chapter 2: Biosolids Increase Soil Fertility in Dryland Pasture Data summarized here was...
Resource Type:: Technical Report

Winter wheat response to nitrogen, phosphorus, sulfur, and zinc supplied by municipal biosolids

Creator:: Shearin, Todd E.
Resource Type:: Masters Thesis
Full Text:: application of biosolids (formerly called sewage sludge) has been a desirable recycling alternative. Due to

The effect of dissolved oxygen concentration on the activated sludge process

Creator:: Swanson, Gregory R.
Abstract:: Since the introduction of pure oxygen activated sludge systems in the late 1960's, proponents have claimed several advantages resulting from the elevated dissolved oxygen (DO) levels maintained. However, numerous comparative studies have failed to produce a consensus of professional opinion regarding the validity of these claimed advantages. The purpose of...
Resource Type:: Dissertation
Full Text:: Activated Sludge Process AN ABSTRACT OF THE THESIS OF Gregory R. Swanson for the degree of Doctor of

ScholarsArchive@OSU

High-shear and pressure activated sludge treatment : solid-liquid separation

Heat utilization in a sewage disposal plant

Agronomic biosolids application rates for dryland wheat across a range of northwest climate zones

The effect of elevated pressure on the activated sludge process

The effect of elevated pressure and high shear on oxygen uptake rates in activated sludge

Determination of fluorinated alkyl substances in aqueous systems

Determination of equilibrium partial pressure of ammonia gas above anaerobically digested sewage sludge

Biosolids Increase Grass Yield, Grass Quality, and Soil Fertility in Dryland Pasture

Winter wheat response to nitrogen, phosphorus, sulfur, and zinc supplied by municipal biosolids

The effect of dissolved oxygen concentration on the activated sludge process

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