Location and Schedule Optimization of Soil Vapor Extraction System Design
Publication: Journal of Water Resources Planning and Management
Volume 124, Issue 1
Abstract
Soil vapor extraction is a cost-effective technique for removing volatile organic compounds (VOCs) immobilized in the unsaturated zone. The design of a soil vapor extraction system (SVES) requires that the number and location of extraction wells and the extraction schedule for each extraction well be determined. In this study, schedule optimization for selected active wells is embedded in location optimization to provide an equal basis for system comparison. A combinatorial two-change local search is employed in both optimizations, but with different user-defined properties to address their distinct problem characteristics. The results indicate that the proposed two-change local search is robust and produces reliable designs. Impacts of soil heterogeneity and initial guess of design are evaluated. A detailed analysis of optimization results indicates that extraction well locations dominate the efficiency of contaminant removal. To reduce additional computation, a screening test based on results at the early stage of schedule optimization is suggested to reject obviously inferior designs.
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Information & Authors
Information
Published In
Journal of Water Resources Planning and Management
Volume 124 • Issue 1 • January 1998
Pages: 47 - 58
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Jan 1, 1998
Published in print: Jan 1998
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