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The effect of temperature on the rate and extent of crude oil biodegradation in a soil slurry.

机译:温度对土壤淤浆中原油生物降解速率和程度的影响。

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摘要

The proper design and management of hydrocarbon-contaminated soil biological treatment systems requires an understanding of the rates at which the hydrocarbon contamination is degraded. The effect of temperature on the rate and extent of crude oil biodegradation was investigated in a soil slurry over 121 days. Biodegradation of Total Extractable Hydrocarbons (TEH) at 5°C and 20°C was measured gravimetrically using Soxhlet extraction with dichloromethane, microbial community numbers were estimated using a 96-well plate most-probable-number technique, and carbon fractions were measured using GC-FID. It was found that the rate of treatment TEH degradation at 5°C from 0--121 days was the same as the rate of treatment TEH dew at 20°C from approximately 42--121 days. In addition, a two-stage first order kinetics model can approximate the rate of degradation of TEH at 20°C, and a single-stage first-order kinetics model can approximate the rate of degradation of TEH at 5°C.
机译:碳氢化合物污染的土壤生物处理系统的正确设计和管理需要了解碳氢化合物污染的降解速率。在121天的时间内,研究了温度对土壤泥浆中原油生物降解速率和程度的影响。使用二氯甲烷的索氏萃取法以重量法测量5°C和20°C时的总可萃取碳氢化合物(TEH)的生物降解,使用96孔板最可能数技术估算微生物群落数,并使用GC测量碳含量-FID。发现在0°C至121天的温度下,在5°C下处理TEH的速率与在大约42--121天后的20°C下处理TEH露水的速率相同。另外,两阶段的一级动力学模型可以近似于20℃下的TEH的降解速率,而单阶段的一级动力学模型可以近似于5℃下的TEH的降解速率。

著录项

  • 作者

    Kvicala, Jamie Lynn.;

  • 作者单位

    University of Calgary (Canada).;

  • 授予单位 University of Calgary (Canada).;
  • 学科 Engineering Environmental.
  • 学位 M.Sc.
  • 年度 2001
  • 页码 127 p.
  • 总页数 127
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境污染及其防治;
  • 关键词

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