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首页> 外文期刊>Ground Water Monitoring & Remediation >Field-Scale Evaluation of Bioaugmentation Dosage for Treating Chlorinated Ethenes
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Field-Scale Evaluation of Bioaugmentation Dosage for Treating Chlorinated Ethenes

机译：生物增强剂量治疗氯化乙烯的现场规模评估

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A field demonstration was performed to evaluate the impacts of bioaugmentation dosage for treatment of chlorinated ethenes in a sandy-to-silty shallow aquifer. Specifically, bioaugmentation using a commercially available Dehalococcoid.es (DHC)-containing culture was performed in three separate groundwater recirculation loops, with one loop bioaugmented with 3.9 × 10~(11) DHC, the second loop bioaugmented with 3.9 × 10~(12) DHC, and the third loop bioaugmented with 3.9 × 10~(13) DHC. Groundwater monitoring was performed to evaluate DHC growth and migration, dechlorination rates, and aquifer geochemistry. The loop inoculated with 3.9 × 10~(12) DHC showed slower dechlorination rates and DHC migration/growth compared with the other loops. This relatively poor performance was attributed to low pH conditions. Results for the loops inoculated with 3.9 × 10~(11) and 3.9 × 10~(13) DHC showed similar timeframes for dechlorination, as evaluated at a monitoring well approximately 10 feet downgradient of the DHC injection well. Application of a recently developed one-dimensional bioaugmentation fate and transport screening model provided a reasonable prediction of the data in these two loops. Overall, these results suggest that increasing bioaugmentation dosage does not necessarily result in decreased dechlorination time-frames in the field. The ability to predict results suggests that modeling potentially can serve as an effective tool for determining bioaugmentation dosage and predicting overall remedial timeframes.
机译：进行了现场演示，以评估生物强化剂量对砂质至粉质浅层含水层中氯化乙烯处理的影响。具体而言，使用市售的含Dehalococcoid.es（DHC）的培养物进行生物强化，是在三个单独的地下水再循环回路中进行的，一个回路采用3.9×10〜（11）DHC进行生物强化，第二个回路采用3.9×10〜（12）进行生物强化。 ），第三个环用3.9×10〜（13）DHC增强。进行了地下水监测以评估DHC的生长和迁移，脱氯率和含水层地球化学。与其他环相比，接种3.9×10〜（12）DHC的环显示出更慢的脱氯速率和DHC迁移/生长。这种相对较差的性能归因于低pH条件。接种3.9×10〜（11）和3.9×10〜（13）DHC的环的结果显示了相似的脱氯时间框架，如在DHC注入井下降约10英尺的监测井处评估的。最近开发的一维生物强化命运和运输筛选模型的应用为这两个回路中的数据提供了合理的预测。总体而言，这些结果表明增加生物强化剂量并不一定会导致田间脱氯时间框架缩短。预测结果的能力表明，建模可以潜在地用作确定生物强化剂量和预测总体修复时间表的有效工具。

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