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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

The effect of organic solvents on an aerobic sewage treatment process

Wallace, Alfred T., January 1960 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1960. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 26-27).
12

Aerobic digestion of waste activated sludge

Norman, John Duncan. January 1961 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1961. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 61-63).
13

The use of pure oxygen in the BOD determination

Burant, Walter. January 1960 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1960. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 39-40).
14

Preaeration of sewage in the presence of waste activated sludge

Montie, Leonard Alvin. January 1962 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1962. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 51-52).
15

Electrode potential measurements in sewage treatment processes and receiving streams

Hendrickson, Ellwood Robert, January 1950 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1950. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 116-118).
16

Removal of phosphorus from sewage plant effluent

Feng, Tsuan Hua, January 1950 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1950. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves [97]-102).
17

The hydraulic characteristics of circular sedimentation basins with Stengel jet inlets

Basco, David R. January 1962 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1962. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 91-94).
18

The use of pure oxygen in the determination of biochemical oxygen demand

James, Roger Barton. January 1960 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1960. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 67-70).
19

Sludge conditioning by aeration

Murphy, Keith Lawson, January 1959 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1959. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 67-70).
20

Verification of the bisubstrate concept in modelling of the activated sludge process

Bagg, Wayne Kendall January 1986 (has links)
Includes bibliography. / This investigation was concerned with two problems: (1) verification of the bisubstrate concept proposed by Dold, Ekama and Marais (1980), in which the biodegradable component of wastewater consists of readily and slowly biodegradable fractions, and (2) physical separation techniques for estimating the readily biodegradable fraction. Intensive research, since 1970, into the behaviour of activated sludge systems at the University of Cape Town has culminated in the formulation of a general kinetic model, by Dold and Marais (1986). The model is highly complex, incorporating a number of different processes; however extensive simulation studies have shown that the model simulates the behaviour of activated sludge systems very closely. A crucial concept incorporated in the general model is that the biodegradable fraction of a wastewater can be subdivided into two fractions with sharply different characteristics (bisubstrate concept), a readily biodegradable fraction which is directly utilized by the organism mass at a high rate and a slowly biodegradable fraction which requires to be solubilized extracellularly to readily biodegradable material for subsequent use by .. the organism. Solubilization is hypothesized to be a relatively slow process. These characteristics were inferred from the oxygen utilization rate response of a system fed in a cyclic square wave fashion. No work has been done to verify if substrates of specific chemical structures can be allocated to one or the other of the fractions. One of the objectives of this investigation was to check if pure and mixtures of specific selected substrates reflected these fractions when fed to activated sludge systems. Glucose and maize starch were selected as representative of readily biodegradable and slowly biodegradable substrate respectively. Systems were run under steady state and square wave cyclic state with glucose only, starch only and glucose/starch mixtures. From the steady state response the specific yield values could be determined and the reliability of the data checked by doing mass balances on the COD. From the cyclic response the specific rate constants for growth and solubilization respectively could be determined by trial simulation using the general model and specifying the concentrations of readily and slowly biodegradable fractions equal to the stoichiometric concentrations of glucose and starch in the feed. The constants thus determined were compared with the "standard" constants for municipal wastewaters.

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