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首页> 美国卫生研究院文献>Applied and Environmental Microbiology >Potential for thermophilic (50 degrees C) anaerobic dechlorination of pentachlorophenol in different ecosystems.
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Potential for thermophilic (50 degrees C) anaerobic dechlorination of pentachlorophenol in different ecosystems.

机译：五氯苯酚在不同生态系统中进行高温（50摄氏度）厌氧脱氯的潜力。

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摘要

Thermophilic (50 degrees C) anaerobic biodegradation of pentachlorophenol (PCP) was investigated by using different inocula from natural ecosystems and anaerobic digesters. The inocula tested were three freshwater sediments, four anaerobic sewage sludge samples from digesters treating sludge from wastewater plants with various industrial inputs, and digested manure from an anaerobic reactor. Only one digested-sludge sample and the manure sample were from thermophilic environments. The initial PCP concentration was 7.5 or 37.5 microM. After 8 months, PCP had disappeared from the sediment samples and various, less chlorinated intermediates were present. Additions of extra PCP were degraded within 4 weeks, and a maximal observed dechlorination rate of 1.61 mumol/liter/day in the vials with addition of 7.5 microM PCP and 7.50 mumol/liter/day in the vials with addition of 37.5 microM PCP were measured for a freshwater sediment. In contrast, only 2.8 to 17.5% of the initial PCP added had disappeared from the sludge samples after 8 months of incubation. The complex pattern of intermediates formed indicated that the dechlorination of PCP proceeded via different pathways, involving at least two different populations in the dechlorination processes.
机译：通过使用来自自然生态系统和厌氧消化池的不同接种物，研究了五氯苯酚（PCP）的高温（50摄氏度）厌氧生物降解。测试的接种物是三种淡水沉积物，来自消化池的四个厌氧污水污泥样品，这些消化池处理具有各种工业投入的污水厂的污泥，以及来自厌氧反应器的消化粪便。只有一个消化污泥样品和粪便样品来自高温环境。 PCP的初始浓度为7.5或37.5 microM。 8个月后，PCP从沉积物样品中消失了，并且存在各种较少的氯化中间体。额外的PCP的添加量在4周内降解，在添加7.5 microM PCP的小瓶中测得的最大脱氯速率为1.61μmol/ L /天，在添加37.5 microM PCP的小瓶中测得的最大脱氯速率为7.50μmol/ L / d。用于淡水沉积物。相反，孵育8个月后，污泥样品中仅添加了最初PCP的2.8％至17.5％。形成的复杂中间体形式表明，五氯苯酚的脱氯过程通过不同的途径进行，在脱氯过程中涉及至少两个不同的种群。

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