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首页> 外文会议>International in Situ and On-Site Bioremediation Synposium >SOIL VAPOR EXTRACTION AND BIOVENTING OF CONTAMINATED LANDFILL MIXED WASTE
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SOIL VAPOR EXTRACTION AND BIOVENTING OF CONTAMINATED LANDFILL MIXED WASTE

机译：土壤蒸汽提取和污染垃圾填埋场混合废物的干预

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Disposal of chemical waste at a landfill facility in Ohio resulted in release of chemicals into the groundwater. Fluctuation of the groundwater table extended the contamination throughout the landfill. Waste excavated at the Site as part of source removal activities needed to be treated to acceptable levels so it could be disposed. The waste consisted of a non-homogenous mixture of municipal and industrial waste, including rubber strips, putrescible garbage, wood, metal, and other solids. The compounds of concern (COCs) in the waste included benzene, toluene, ethylbenzene, and xylenes (BTEX), trichloroethene (TCE), tetrachloroethene (PCE), and vinyl chloride monomer (VCM). Soil vapor extraction (SVE) followed by bioventing as a polishing step was identified as a potential treatment alternative for the remediation of this waste. A bench-scale treatability study (Phase I of USEPA remedial action) was conducted to assess whether this technique could be applied to effectively treat the waste and reduce the contaminant concentrations. The treatability study was conducted in phases: SVE to remove the TCE, PCE, and VCM, followed by bioventing to enhance biodegradation of the BTEX compounds. The SVE treatment was 99.3 percent effective in removing the TCE. The toxicity characteristic leaching procedure (TCLP) regulatory limit for TCE is 0.5 mg/L. All of the rubber and waste samples were below this limit with greater than a 99 percent confidence level after 6 weeks. Bioventing resulted in greater than 78 percent removal of the BTEX from the soil and greater than 99 percent removal from the rubber material. Based on the successful results of the treatability studies, a pilot test is being conducted.
机译：在俄亥俄州垃圾填埋场处理处理化学废物导致化学物质释放到地下水中。地下水位的波动延伸了整个垃圾填埋场的污染。作为源去除活动的一部分，挖掘在该网站的废物需要处理到可接受的水平，所以它可以被征收。废物由市政和工业废物的非均匀混合物组成，包括橡胶条，可腐烂的垃圾，木材，金属等固体。废物中的关注化合物（COCs）包括苯，甲苯，乙苯和二甲苯（BTEX），三氯乙烯（TCE），四氯乙烯（PCE）和氯乙烯单体（VCM）。土壤蒸汽萃取（SVE）随后被抛光步骤被鉴定为潜在的处理替代这种废物的替代品。进行了基准调节性研究（使用PAPA补救措施的阶段I）以评估该技术是否可以应用以有效治疗废物并降低污染物浓度。该可治疗性研究在阶段进行：SVE以除去TCE，PCE和VCM，然后进行生物衰竭以增强BTEX化合物的生物降解。 SWE治疗99.3％，有效地去除TCE。 TCE的毒性特征浸出程序（TCLP）调节限额为0.5mg / L.所有橡胶和废物样品低于该极限，6周后大于99％的置信水平。生物缺乏导致从土壤中除去BTEX的78％，从橡胶材料中除去99％。根据可治疗性研究的成功结果，正在进行试验试验。

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