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Document Type:Latin Dissertation
Language of Document:English
Record Number:52396
Doc. No:TL22350
Call number:‭NR33017‬
Main Entry:Iran Eduardo Lima Neto
Title & Author:Gas injection in water for artificial aeration and circulationIran Eduardo Lima Neto
College:University of Alberta (Canada)
Date:2007
Degree:Ph.D.
student score:2007
Page No:137
Abstract:This thesis presents investigations on gas injection in water, including a large-scale study on river aeration and four subsequent laboratory-scale studies on bubble plumes and gas-liquid jets. The purpose of the first investigation was to evaluate the effectiveness of a new artificial aeration technique, in which pure oxygen was injected into an effluent pipeline and discharged into a river as a gas-liquid jet. This technique takes advantage of the existing effluent outfall for artificial aeration and was shown to be an effective means of improving the dissolved oxygen levels in the river. The purpose of the laboratory investigations was to better understand the effect of tank size and geometry, nozzle type, and different gas injection methods on the artificial aeration/circulation potential of bubble plumes and gas-liquid jets. The experimental results can be applied for many engineering applications, including the above-mentioned river aeration technique as well as lake/reservoir restoration and wastewater treatment, and can also be used for evaluation and validation of computational fluid dynamic (CFD) models for simulation of gas-liquid flows. Important fundamental results obtained in this thesis such as increased bubble relative velocity on bubble swarms, as compared to that of isolated bubbles, and increased liquid volume flux in bubbly jets, as compared to that of simple water jets, will also help the understanding of complex interactions involved in two-phase flows.
Subject:Applied sciences; Artificial aeration; Artificial circulation; Dissolved oxygen; Gas injection; Water; Environmental engineering; 0775:Environmental engineering
Added Entry:University of Alberta (Canada)