A reactor model for pulsed pumping groundwater remediation

Water Research
C M TenneyMichael J Dybas

Abstract

A hybrid in situ bioremediation/pulsed pumping strategy has been developed to cost effectively remediate a carbon tetrachloride plume in Schoolcraft, Michigan. The pulsed pumping system uses a line of alternating injection and extraction wells perpendicular to the direction of natural groundwater flow. The wells pump periodically to clean the recirculation zone between adjacent wells. During the pump-off phase, natural groundwater flow brings new contaminant into the recirculation zone. The wells are pumped again prior to breakthrough of contaminant from the recirculation zone. A computationally efficient reactor model has been developed, which conceptually divides the aquifer into injection, extraction, and recirculation zones, which are represented by a network of chemical reactors. Solute concentration histories from three-dimensional finite difference simulations and from field data confirm the reactor model predictions. The reactor model is used to investigate the optimal well configuration, pumping rate, and pumping schedule for achieving maximum pollutant degradation.

Citations

Mar 14, 2007·Journal of Contaminant Hydrology·C M Tenney, C M Lastoskie
Jul 13, 2006·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Myoung-Sook ShinJeong-Eun Lee

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