Modeling Ventilation Phenomenon in Sanitary Sewer Systems: A System Theoretic Approach
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Volume 132, Issue 8
Abstract
Municipal wastewater collection systems, due to the nature of their functions, carry varying concentrations of odorous gases. The production rate and transport of these gases within and out of sewer systems depend on air flow rate in the system piping. However, municipal sewers are generally designed to only transport sewage flow without giving consideration to the air flow field. As a consequence, the movement of air into, along, and out of collection systems is for the most part uncontrolled. The purpose of this paper therefore is to provide a new design protocol based on system theoretic techniques to be used by municipal engineers and environmentalists involved in odor control and sewer foul air transport studies. The modeling formulation accounts for combined wastewater drag and pressure-induced air flows, and manhole pressurization. The developed framework is applied to both hypothetical and real sewer systems to only illustrate the applicability of the modeling formulation.
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Acknowledgments
The writers gratefully acknowledge financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) through a research grant to the second writer andthe University of Alberta Research Assistantship to the first writer. Thanks also go to the City of Edmonton Drainage Services for providing them with their system and data for illustration.
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Information
Published In
Journal of Hydraulic Engineering
Volume 132 • Issue 8 • August 2006
Pages: 778 - 790
Copyright
© 2006 ASCE.
History
Received: Oct 20, 2004
Accepted: Nov 9, 2005
Published online: Aug 1, 2006
Published in print: Aug 2006
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