Design Analysis for Sequential Ex-Situ Soil Remediation

该研究将通过开发一种工具来帮助工程师设计顺序的非原位修复，从而改进陆地修复的实践。迁地修复是修复陆地污染的基本战略之一，但很少考虑，因为人们认为这种方法不适当或过于昂贵。然而，在某些情况下，迁地修复可能是一个很好的选择，包括具有众多分布污染区的场地或由“旧”土壤污染问题主导的棕地场地。移地控制避免了针对分布式污染源的个别运动的费用，并允许在小区域完成修复的同时重用大部分场地。移地密封也允许使用在原地不宜采用的侵略性处理方法。对于顺序的移地修复是合适的情况，它可以提高修复的程度，降低修复的成本，提高绩效目标已经实现的信心。不幸的是，实施移地修复的最大障碍是缺乏设计/分析工具来帮助工程师识别机会，并帮助配置和控制一系列移地修复步骤。本研究将开发一种分析工具，以帮助工程师检查一系列低成本的非原位补救措施的优点。这将被设计为一个模拟引擎接口与一大批补救过程子程序。模拟引擎将定义问题的结构（几何容器、土壤结构、屏障系统、环境接口、状态变量等）。子程序将从模拟引擎提供的任意条件和物质通量中实施各种各样的修复过程（蒸汽提取、生物通风、生物修复、土壤洗涤、土壤浸出等）。该软件包将帮助工程师配置处理顺序，并设计顺序操作的控制策略。这将是一个微型计算机分析包，在传统的“高级”微型计算机上以可接受的速度运行。该软件包将设计为用户友好的界面，具有图形数据显示和广泛的报告编写功能。

This research will improve the practice of terrestrial remediation by developing a tool to help engineers design sequential ex-situ remediation. Ex-situ remediation is one of the fundamental strategies for remediating terrestrial contamination, but is infrequently considered because it is believed to be inappropriate or prohibitively expensive. However, there are situations where ex-situ remediation can be an excellent choice, including sites with numerous, distributed zones of contamination or Brownfield sites dominated by the problems of `old` soil contamination. Ex-situ containment avoids the expense of individual campaigns against distributed sources, and allows reuse of large portions of sites while small areas accomplish remediation. Ex-situ containment also allows use of aggressive processes that would not be advisable in situ. For cases where sequential ex-situ remediation is appropriate, it can improve the degree of remediation, reduce the cost of remediation and improve the confidence that performance goals have been achieved. Unfortunately, the greatest impediment to implementing ex-situ remediation is the lack of a design/analysis tool to help engineers identify opportunities and to help configure and control a sequence of ex-situ remediation steps. This research will develop an analysis tool to help engineers examine the merits of a sequence of remedial actions applied ex-situ at low cost. This will be designed as a simulation engine interfacing with a large set of remediation process subprograms. The simulation engine will define the structure of the problem (geometric containment, soil structure, barrier systems, environmental interfaces, state variables, etc.). The subprograms will implement a wide variety of remediation processes (vapor extraction, bio-venting, bioremediation, soil washing, soil leaching, etc.) from arbitrary conditions and material fluxes provided by the simulation engine. The package will help engineers configure treatment sequence, and design control strategies for sequence operation. This will be a microcomputer analysis package constructed to run at acceptable speed on conventional `advanced` microcomputers. The package will be designed with user-friendly interfaces, with graphical data displays and with extensive report authoring capabilities.