Design Analysis for Sequential Ex-Situ Soil Remediation

顺序异位土壤修复的设计分析

• 批准号: 9713570
• 负责人: Aaron Jennings
• 金额: $ 18.97万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-10-01 至 2001-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9713570&HistoricalAwards=false
• 关键词: Design; Analysis; Sequential; Ex; Situ

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.

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地修复，从而改进陆地修复的实践。异地修复是修复陆地污染的基本策略之一，但很少被考虑，因为它被认为是不合适的或昂贵得令人望而却步。然而，在某些情况下，异地修复可能是一个很好的选择，包括具有众多分布的污染区的地点，或者以“老的”土壤污染问题为主的棕地地点。异地遏制避免了针对分布式来源的单独行动的成本，并允许重复使用大部分站点，而小区域则完成补救。异地遏制还允许使用不适宜在原地进行的侵略性工艺。对于顺序异地补救是适当的情况，它可以提高补救程度，降低补救成本，并提高对已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/分析工具来帮助工程师发现机会并帮助配置和控制一系列异地补救步骤。这项研究将开发一种分析工具，帮助工程师检查以低成本在异地实施的一系列补救行动的优点。这将被设计为一个模拟引擎，与一大套补救流程子计划对接。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修复过程(蒸气提取、生物通风、生物修复、土壤清洗、土壤淋洗等)。从模拟引擎提供的任意条件和材料通量。该程序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程序包，可在传统的“先进”微型计算机上以可接受的速度运行。该程序包将设计成用户友好的界面，具有图形数据显示和广泛的报告创作能力。