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首页> 外文学位 >Procedural treatment options to address intermittent pentachlorophenol effluent exceedances at a former wood-treatment site in Butte, Montana.
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Procedural treatment options to address intermittent pentachlorophenol effluent exceedances at a former wood-treatment site in Butte, Montana.

机译：在蒙大拿州比尤特的一个前木材处理厂处理间歇性五氯酚废水超标的程序性处理方案。

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摘要

The Montana Pole and Treating Plant in Butte, Montana treated wood with preservatives, mainly pentachlorophenol (PCP), which had been dissolved in a carrier fluid. Accidents and careless handling spilled large quantities of the fluid on the site, contaminating the vadose zone and groundwater. This site has been undergoing remediation since it was added to the CERCLA National Priorities List in 1987. Pentachlorophenol and dioxin are the contaminants of concern. Remediation technologies have included soil removal and installation of two water recovery trenches that collect groundwater, which is then pumped through a granular activated carbon (GAC) water treatment system. There were 22 exceedances of the 1 ppb treatment standard from 2003-2014. This thesis assigns a possible cause for each exceedance. Possible causes were determined to be due to normal plant operational procedures (18 exceedances), accidents (three exceedances), and climatic effects (one exceedance). The normal procedure of backwashing both carbon vessel trains on the same day was the possible cause, or one of two causes, for nine of the exceedances. It was recommended that only one of the two GAC vessel trains be backwashed at a time. Events that flushed the vadose zone, which increased PCP concentrations in the influent to the GAC vessels, were implicated in twelve of the exceedances. These events were normal plant operations (shutting down pumps during plant upgrades and rapid onsets of carbon bed exhaustion before the carbon could be replaced), accidents (a power outage and two water main breaks), and infiltration of storm water from off site during a heavy rainfall. Recommendations for counteracting the causes were made that should reduce the number of effluent quality exceedances.
机译：位于蒙大拿州比尤特的蒙大拿州立杆和处理厂用防腐剂（主要是五氯苯酚（PCP））处理木材，该防腐剂已溶解在载液中。事故和疏忽的处理使大量液体溢出现场，污染了渗流区和地下水。此站点自从1987年被添加到CERCLA国家优先级列表中以来，一直在进行补救。五氯苯酚和二恶英是令人关注的污染物。修复技术包括去除土壤和安装两个用于收集地下水的水回收沟，然后将其泵送通过颗粒活性炭（GAC）水处理系统。从2003年至2014年，22超出了1 ppb的处理标准。本文为每次超出量确定了可能的原因。确定可能的原因是由于正常的工厂操作程序（超过18次），事故（超过3次）和气候影响（超过1次）引起的。在同一天对两个碳容器列车进行反冲洗的正常程序是其中九个超标的可能原因或两个原因之一。建议一次清洗两个GAC船列之一。冲洗渗流区的事件增加了流入GAC容器的进水中PCP的浓度，其中涉及十二个超标。这些事件包括工厂的正常运行（在工厂升级期间关闭泵，以及在可更换碳之前迅速关闭碳床用尽），事故（停电和两次供水中断），以及在生产过程中雨水从场外渗入。倾盆大雨。提出了应对原因的建议，应减少流出物质量超标的数量。

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  • 作者

    Dunkle, Travis.;

  • 作者单位

    Montana Tech of The University of Montana.;

  • 授予单位 Montana Tech of The University of Montana.;
  • 学科 Environmental engineering.;Environmental studies.
  • 学位 M.S.
  • 年度 2016
  • 页码 160 p.
  • 总页数 160
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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