Design Analysis for Sequential Ex-Situ Soil Remediation

这项研究将通过开发一种工具来帮助工程师设计顺序的异位修复，从而改善陆地修复的实践。 移地补救是补救陆地污染的基本战略之一，但很少被考虑，因为人们认为它不合适或过于昂贵。 然而，在有些情况下，异地补救可能是一个很好的选择，包括有许多分布的污染区的地点或主要受“老”土壤污染问题影响的布朗菲尔德地点。 异地遏制避免了对分布式源的个人运动的费用，并允许重新使用大部分的网站，而小面积完成补救。非原位遏制还允许使用在原位不可取的侵蚀性过程。 对于适宜采取顺序异地补救的情况，这种补救办法可提高补救程度，降低补救费用，并提高对实现业绩目标的信心。 不幸的是，实施异地补救的最大障碍是缺乏设计/分析工具，以帮助工程师确定机会，并帮助配置和控制一系列异地补救步骤。 这项研究将开发一个分析工具，以帮助工程师检查的优点，一系列的补救措施适用于异地以低成本。 这将被设计为一个模拟引擎接口与一个大的补救过程子程序集。 模拟引擎将定义问题的结构（几何包容、土壤结构、屏障系统、环境界面、状态变量等）。 这些子方案将实施各种各样的补救过程（蒸汽提取、生物通风、生物补救、土壤冲洗、土壤沥滤等）。由模拟引擎提供的任意条件和材料通量。 该软件包将帮助工程师配置治疗顺序，并设计控制策略的顺序操作。 这将是一个微型计算机分析程序包，它的结构能在传统的“高级”微型计算机上以可接受的速度运行。 该软件包将设计有用户友好界面、图形数据显示和广泛的报告编写能力。

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.