Tenney C M, Lastoskie C M, Dybas M J
Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI 48109-2125, USA.
Water Res. 2004 Nov;38(18):3869-80. doi: 10.1016/j.watres.2004.06.029.
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.
已开发出一种原位生物修复/脉冲抽水混合策略，以经济高效地修复密歇根州斯科茨克雷夫特的四氯化碳羽流。脉冲抽水系统使用一排垂直于天然地下水流向的交替注入和抽水井。这些井定期抽水，以清理相邻井之间的再循环区域。在停泵阶段，天然地下水流将新的污染物带入再循环区域。在污染物从再循环区域突破之前，再次抽水。已开发出一种计算效率高的反应器模型，该模型在概念上将含水层划分为注入区、抽水区和再循环区，这些区域由化学反应器网络表示。三维有限差分模拟和现场数据得出的溶质浓度历史证实了反应器模型的预测。该反应器模型用于研究实现最大污染物降解的最佳井配置、抽水速率和抽水计划。
