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首页> 外文期刊>International Journal of Soil, Sediment and Water >An Integrated Site Wide Approach to Chlorinated Solvent Source Remediation in an Active Manufacturing Facility
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An Integrated Site Wide Approach to Chlorinated Solvent Source Remediation in an Active Manufacturing Facility

机译：在主动制造工厂中采用全站点范围内的方法来解决氯化溶剂来源的问题

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The discovery of chlorinated volatile organic compounds (CVOCs) in the aquifer underlying a manufacturing facility prompted the initiation of an aggressive voluntary site wide soil and groundwater cleanup. Given a large number of potential source areas within the plant, delineation of CVOC impacts to the unsaturated zone was performed by the installation of an innovative soil vapor extraction system, rather than performing extensive soil sampling within the operating manufacturing facility. The system was designed with a pneumatically actuated valve manifold system to cycle the 120 extraction points which allowed for delineation of impacts, targeting hot spot source area removal, and overall contaminant reduction while remaining below regulatory discharge requirements, thereby eliminating the need for more costly air treatment. The innovative system design reduced equipment size by 80% while improving system recovery by operating in the most productive range of the removal curve. The groundwater remediation system, consisting of 6 extraction wells and 7 injection wells, is capable of extracting up to 600 gallons per minute (gpm) of groundwater. Up to 200 gpm of the extracted groundwater is treated by shallow tray air strippers with subsequent discharge via NPDES permitted outfall and re-injection of up to 400 gpm of substrate augmented groundwater into the upgradient portion of the plume. The net loss from the NPDES discharge provides capture and treatment of offsite groundwater downgradient of the site. The groundwater remediation system operates as a closed loop bioreactor allowing downgradient microbial seed to be recycled into the up gradient heart of the plume to increase the rate and effectiveness of CVOC removal via reductive dechlorination. Operations have so far have removed over 900 pounds of CVOCs from the unsaturated zone and over 1500 pounds CVOCs from the groundwater within the treatment zone. Groundwater treatment is ongoing.
机译：在制造设施下面的含水层中发现了氯化挥发性有机化合物（CVOC），促使人们开始积极主动地在场地范围内进行土壤和地下水净化。考虑到工厂内有大量潜在的污染源区域，通过安装创新的土壤蒸汽提取系统来完成CVOC对非饱和区的影响划分工作，而不是在运行的制造工厂内进行大量的土壤采样。该系统采用气动阀门歧管系统设计，可循环120个抽气点，以描绘影响，确定热点区域的面积并减少总体污染物，同时保持低于规定的排放要求，从而消除了对昂贵空气的需求治疗。创新的系统设计通过在去除曲线的最高生产率范围内进行操作，将设备尺寸减少了80％，同时提高了系统恢复率。地下水修复系统由6口抽采井和7口注入井组成，每分钟可抽取600加仑的地下水。最高200 gpm的提取地下水由浅塔板气提器处理，随后通过NPDES排放，允许排污口排放，并将高达400 gpm的底物增强的地下水重新注入到羽流的上升部分。 NPDES排放的净损失为现场的地下水位下降提供了捕获和处理方法。地下水修复系统作为闭环生物反应器运行，可将降级的微生物种子再循环到羽流的上梯度中心，从而通过还原性脱氯提高CVOC去除率和有效性。到目前为止，操作已经从非饱和区中去除了900磅以上的CVOC，并从处理区内的地下水中去除了1500磅以上的CVOC。正在进行地下水处理。

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