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COMPARATIVE PILOT STUDY FOR SELECTING ENHANCED BIOREMEDIATION INOCULANT

机译:选择增强型生物修复接种剂的比较试验研究

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An enhanced bioremediation pilot test was completed at an active dry cleaners facility in Portland, Oregon to determine the effectiveness of two competing enhancement inoculants. The purpose of the project was to determine which of the inoculants would be most effective in the subsequent remediation of site soil and groundwater. The two competing inoculants were WILCLEAR? (provided by JRW Technologies, through North Wind Environmental) and Cl-OUT? (provided by Cl- Solutions). Both inoculants were first introduced into site groundwater in the fall of 2001, and groundwater monitoring was initiated to observe the effects of the materials on the groundwater chemistry. Additional injections of each material were completed as necessary to maintain a suitable reductive environment. Ten groundwater sampling events were completed over the 180-day duration of the pilot study. The collected data were used to assess the effectiveness of the biodegradation and to identify causes of inefficiencies in the system. Both materials (WILCLEAR? and Cl-OUT?) were apparently successful in reducing concentrations of PCE and TCE (resulting in one to two orders of magnitude reduction in concentration). The WILCLEAR? injections, however, were not able to continue the dechlorination process beyond cis-DCE (which increased in concentration as the test progressed) during the pilot-test time frame. The Cl-OUT? injections were successful in reducing the chlorinated hydrocarbons (including cis-DCE and vinyl chloride) in the treatment area within the same time frame.
机译:在俄勒冈州波特兰市的一家活跃的干洗店设施中完成了一项增强的生物修复试验,以确定两种竞争性增强接种剂的有效性。该项目的目的是确定哪种接种剂在随后的场地土壤和地下水修复中最有效。两个竞争的孕育剂是WILCLEAR吗? (由JRW Technologies通过North Wind Environmental提供)和Cl-OUT? (由Cl- Solutions提供)。两种孕育剂于2001年秋季首次引入现场地下水,并开始进行地下水监测以观察这些物质对地下水化学的影响。根据需要完成每种材料的额外注射,以维持合适的还原环境。在试验研究的180天内,完成了十次地下水采样事件。收集的数据用于评估生物降解的有效性并确定系统效率低下的原因。两种材料(WILCLEAR?和Cl-OUT?)显然都成功地降低了PCE和TCE的浓度(导致浓度降低了一到两个数量级)。威尔基尔?但是,在中试时间范围内,注射液无法在顺式-DCE(浓度随着测试的进行而增加)以外的条件下继续进行脱氯过程。 Cl-OUT?注射在同一时间范围内成功地减少了治疗区域中的氯代烃(包括顺式-DCE和氯乙烯)。

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