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首页> 外文会议>International Conference on Remediation of Chlorinated and Recalcitrant Compounds >Enhanced Anaerobic Bioremediation Using a Nonemulsified Vegetable Oil Blend: Field Implementation and Experimental Efforts
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Enhanced Anaerobic Bioremediation Using a Nonemulsified Vegetable Oil Blend: Field Implementation and Experimental Efforts

机译：使用不浸润的植物油混合物增强厌氧生物修复：现场实施和实验努力

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Background/Objectives. Enhanced anaerobic biodegradation (EAB) with emulsified and nonemulsified vegetable oils has been implemented at thousands of commercial and military field sites globally. For EAB (i.e. reductive dechlorination) of chlorinated volatile organic contaminants (CVOCs) to proceed, sufficient hydrogen must be generated to meet the stoichiometric demand of target compounds and nontarget species (e.g., competing electron acceptors) in the subsurface. Since nonemulsified vegetable oil blends are not diluted with water, 100% of the product contributes hydrogen to support bioremediation, providing a long-term hydrogen source that can last for years. CAP 18?, a nonemulsified vegetable oil blend, was applied at a former dry cleaner site characterized by elevated levels of CVOCs, relatively high groundwater seepage velocities, and a relatively deep treatment zone consisting of multiple lithological units. Substrate dosages were determined for each lithological unit and amendment delivery was successfully completed using direct-push techniques. The substrate injection provided a cost effective remedial solution resulting in significant contaminant concentration reductions, and contributed to the protection of down gradient receptors.
机译：背景/目标。增强的厌氧生物降解（EAB）具有乳化和不浸润的植物油已在全球数千名商业和军事场所实施。对于氯化挥发性有机污染物（CVOC）进行的EAB（即还原脱氯）进行，必须产生足够的氢以满足地下中靶化合物和Nontarget物种（例如，竞争电子受体）的化学计量需求。由于不浸入的植物油共混物不用水稀释，100％的产物有助于氢以支持生物化，提供能够持续多年的长期氢源。帽18？，不浸的植物油混合物在以前的干燥清洁场所施用，其特征在于CVOC水平升高，地下水渗流速度升高，以及由多种岩性单元组成的相对深的处理区。确定每个岩性单元测定底物剂量，并使用直推技术成功完成修正递送。基板注射提供了成本有效的补救溶液，导致显着的污染物浓度降低，并有助于保护下梯度受体。

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