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首页> 外文期刊>Journal of Environmental Science and Health >Modeling E.coli fate and transport in treatment wetlands using the water quality analysis and simulation program
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Modeling E.coli fate and transport in treatment wetlands using the water quality analysis and simulation program

机译：使用水质分析和模拟程序模拟处理湿地中的大肠杆菌命运和运输

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摘要

Treatment wetlands can be a viable wastewater treatment option, especially in rural and remote regions where centralized wastewater treatment is not feasible. Bacteria fate and transport modeling within wetlands requires further development if they are to become a more reliable and predictable form of wastewater treatment. The goal of this paper was to calibrate and test an unsteady state numerical model for the simulation of E. coli fate and transport within full-scale surface flow (SF) wetlands treating domestic wastewater. The Water Quality Analysis and Simulation Program (WASP) was used to develop the model. Accurately predicting E. coli effluent concentrations using WASP was difficult due to the dynamic nature of the wetland environment including hydraulics, seasonal variability, and wetland maturity. WASP was successful in predicting average E. coli effluent concentrations but did not accurately forecast maximum and minimum values. The model produced better fits with observed E. coli effluent concentrations during the summer months, when observed effluent concentrations were less variable. Hydraulic tracer studies and model results suggest that preferential flow pathways may be affecting E. coli removal due to reduced retention times. Flow channelling or short circuiting may have been caused by high flow conditions and/or dense cattail growth. A more detailed understanding of treatment wetland hydraulics is required before we can accurately predict treatment performance.
机译：处理湿地可能是可行的废水处理方案，特别是在集中废水处理不可行的农村和偏远地区。如果要将湿地内的细菌命运和运输模型转化为更可靠和可预测的废水处理形式，则需要进一步发展。本文的目的是校准和测试非稳态数值模型，用于模拟处理家庭废水的全尺寸表面流（SF）湿地中的大肠杆菌命运和运输。使用水质分析和模拟程序（WASP）来开发模型。由于湿地环境的动态特性（包括水力学，季节变化和湿地成熟度），因此使用WASP准确预测大肠杆菌污水浓度非常困难。 WASP成功地预测了大肠杆菌的平均废水浓度，但没有准确地预测最大值和最小值。当观察到的废水浓度变化较小时，该模型与夏季观察到的大肠杆菌废水浓度更好地拟合。水力示踪剂研究和模型结果表明，由于减少了保留时间，优先流动路径可能会影响大肠杆菌的去除。流动通道或短路可能是由于高流动条件和/或密集的香蒲生长引起的。在我们能够准确预测处理性能之前，需要对处理湿地水力系统有更详细的了解。

著录项

  • 来源
    《Journal of Environmental Science and Health》 |2011年第7期|p.680-691|共12页
  • 作者

    LEAH BOUTILIER; ROB JAMIESON; ROBERT GORDON; CRAIG LAKE;

  • 作者单位

    Department of Process Engineering & Applied Science, Dalhousie University, Halifax, Nova Scotia, Canada;

    Department of Process Engineering & Applied Science, Dalhousie University, Halifax, Nova Scotia, Canada;

    School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada;

    Civil Engineering, Dalhousie University, Halifax, Nova Scotia, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    treatment wetland; wasp; unsteady state model; e. coli transport.;

    机译：处理湿地;黄蜂;非稳态模型e。大肠杆菌运输。;

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