MODELING STUDIES TO SUPPORT DESIGN OF A FIELD EVALUATION OF <I>IN SITU</I> BIOREMEDIATION OF PERCHLORATE-CONTAMINATED GROUNDWATER

A three-dimensional analytical model to simulate groundwater flow during operation of recirculating wells

“…In recent years, HFTWs have increasingly been used to accomplish in situ destruction of contaminants in groundwater (McCarty et al, 1998;ESTCP, 2002; Munakata et al, 2002;Huang et al, 2004). The analytical solution presented in this study provides designers of HFTW installations with a tool to quickly and accurately determine the three-dimensional groundwater flow field resulting from system operation, as well as a means to more fully understand the technology.…”

“…Similarly, the second well (the downflow well) draws contaminated water into the upper well screen, pumps it downward through a mixer where amendments are added, and then injects it into the aquifer through the lower well screen. The remedial amendment might consist of a nutrient to stimulate biodegradation in bioactive zones outside the injection well screens (McCarty et al, 1998;ESTCP, 2002;Huang et al, 2004), or an oxidant or reductant to induce contaminant destruction in an inwell reactor (Munakata et al, 2002;Stoppel and Goltz, 2003). Fig.…”