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Title: Evaluation of parameters influencing oxygen transfer efficiency in a membrane bioreactor 
Author: Hu, Jing
Date: 2006
Abstract: Design of fine-bubble aeration systems for membrane bioreactors (MBRs) is challenging due to high mixed liquor suspended solids (MLSS) concentrations that cause changes in alpha value, which is the ratio of mass transfer rate under process conditions to that under clean water conditions. This study describes the results of pilot-scale fine-pore aeration testing to determine a-values and influencing factors for MBRs. Clean water and process water aeration tests were performed at the Honouliuli WWTP during the period of December 2005 and October 2006. Three different 9-inch diameter fine-pore diffusers were tested. Comprehensive analyses of the sludge properties were conducted. Through this study, correlations were found to exist between a-value and oxygen uptake rate (OUR), particle size distribution (PSD), MLSS and viscosity of activated sludge, thereby providing better understanding and design guidance for MBR aeration systems.
Description: Thesis (M.S.)--University of Hawaii at Manoa, 2006. Includes bibliographical references (leaves 96-99). xiii, 99 leaves, bound ill. (some col.) 29 cm
URI: http://hdl.handle.net/10125/20477
Rights: All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Keywords: Bioreactors -- Design and construction, Aeration tanks -- Design and construction

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Restricted for viewing only M.S.Q111.H3_4125 DEC 2006_r.pdf 3.721Mb PDF View/Open
For UH users only M.S.Q111.H3_4125 DEC 2006_uh.pdf 3.715Mb PDF View/Open

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