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首页> 外文期刊>Journal of Environmental Engineering >Use of an anaerobic sludge digestion process to treat pentachlorophenol-(PCP-) contaminated soil
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Use of an anaerobic sludge digestion process to treat pentachlorophenol-(PCP-) contaminated soil

机译：使用厌氧污泥消化工艺处理五氯苯酚-（PCP-）污染的土壤

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Extensive pentachlorophenol (PCP) contamination and its increasing treatment costs motivate the search for better treatment alternatives. In this study, the feasibility and effectiveness of an anaerobic sludge digestion process was evaluated. Two laboratory-scale digesters mimicking the commonly used anaerobic sludge digester in a municipal wastewater treatment plant were operated to treat PCR Results showed that up to 0.98 mM of chemical PCP dissolved in acetone and 0.6 mM soil PCP from a contaminated site were treated at nearly 100 and 97.3% efficiencies, respectively. PCP dechlorination followed two major pathways: PCP to 2,3,4,5-TeCP to 2,3,5- or 3,4,5-TCP to 3,5-DCP and PCP to 2,3,5,6-TeCP to 2,3,5-TCP to 3,5-DCP to 3-MCP. The 3-MCP was not present until 26 days after the first addition of PCP, which also concluded the end of the sludge acclimation process to PCP. Microbial acclimation reduced chlorophenol toxicity and enhanced degradation of chlorophenol. Without acclimation the gas production and chlorophenol degradation were both significantly hindered. 95% of the added PCP was transformed to 3-MCP, 4.5% to 3,4-DCP, and 0.5% to 3,5-DCP, and about 20% of the PCP by-products remained in liquid and the rest adsorbed on sludge solids. Results of this study suggested the potential use of an anaerobic sludge digestion process for PCP-contaminated soil remediation. [References: 7]
机译：广泛的五氯苯酚（PCP）污染及其不断增加的治疗成本，促使人们寻求更好的治疗选择。在这项研究中，评估了厌氧污泥消化过程的可行性和有效性。运行了两个模拟市政规模污水处理厂中常用厌氧污泥消化器的实验室规模的消化器来处理PCR结果显示，在近100个条件下，处理了高达0.98 mM的溶于丙酮的化学五氯苯酚和0.6 mM的受污染场地的土壤五氯苯酚和97.3％的效率。 PCP脱氯遵循两个主要途径：PCP到2,3,4,5-TeCP到2,3,5-或3,4,5-TCP到3,5-DCP和PCP到2,3,5,6- TeCP到2,3,5-TCP到3,5-DCP到3-MCP。直到第一次添加PCP后26天才出现3-MCP，这也结束了PCP污泥驯化过程的结束。微生物适应降低了氯酚的毒性并增强了氯酚的降解。在不适应的情况下，显着阻碍了气体产生和氯酚降解。 95％的PCP转化为3-MCP，4.5％转化为3,4-DCP，0.5％转化为3,5-DCP，约20％的PCP副产物保留在液体中，其余吸附在污泥固体。这项研究的结果表明，厌氧污泥消化工艺可用于PCP污染土壤的修复。 [参考：7]

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