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首页> 外文期刊>Environmental Science & Technology >LCA as a Decision Support Tool for the Environmental Improvement of the Operation of a Municipal Wastewater Treatment Plant
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LCA as a Decision Support Tool for the Environmental Improvement of the Operation of a Municipal Wastewater Treatment Plant

机译：LCA作为改善市政污水处理厂运营环境的决策支持工具

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摘要

Life cycle assessment (LCA) methodology is used to evaluate the environmental profile of a product or process from its origin to its final destination. In this paper we used LCA to evaluate the current situation of a wastewater treatment plant and identify improvement alternatives. Currently, the highest environmental impacts are caused by the stages of the plant with the highest energy consumption, the use of biogas from anaerobic digestion (95% burned in torch) and the final destination of the sludge (98.6% for agricultural use and 1.4% for compost). We propose four alternatives for biogas applications and five alternatives for sludge applications and compare them to the current situation. The alternatives were incorporated in a decision support system to identify and prioritize the most positive environmental option. Using biogas to produce electricity or a combination of electricity and heat provided the best environmental options since the energy produced would be enough to supply all the stages of the plant, thus reducing their environmental impact. The best environmental option for the final destination of the sludge is to combine the current situation (fertilizer replacement) with use of the sludge in a cement plant (as a replacement for fuel and raw material).
机译：生命周期评估（LCA）方法用于评估产品或过程从其原产地到最终目的地的环境概况。在本文中，我们使用LCA评估了废水处理厂的现状并确定了改进方案。目前，对环境的影响最大的是工厂中能耗最高的阶段，厌氧消化产生的沼气的使用（95％的割炬燃烧）以及污泥的最终目的地（98.6％用于农业用途和1.4％）堆肥）。我们提出了沼气应用的四种替代方案和污泥应用的五种替代方案，并将它们与当前情况进行了比较。替代方案被纳入决策支持系统，以识别最优先的环境方案并确定其优先级。使用沼气发电或将电能与热量结合使用可提供最佳的环境选择，因为所产生的能量足以供应工厂的所有阶段，从而减少了对环境的影响。污泥最终目的地的最佳环境选择是将当前情况（更换肥料）与水泥厂污泥的使用（作为燃料和原材料的替代品）结合起来。

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  • 来源
    《Environmental Science & Technology》 |2009年第9期|3300-3307|共8页
  • 作者

    JORGELINA C. PASQUALINO; MONTSE MENESES; MONTSERRAT ABELLA; FRANCESC CASTELLS;

  • 作者单位

    AGA, Chemical Engineering Department, Rovira i Virgili University, Avinguda dels Paiesos Catalans 26, 43007 Tarragona, Spain;

    AGA, Chemical Engineering Department, Rovira i Virgili University, Avinguda dels Paiesos Catalans 26, 43007 Tarragona, Spain;

    EMATSA, AGBAR group, 43005 Tarragona, Spain;

    AGA, Chemical Engineering Department, Rovira i Virgili University, Avinguda dels Paisos Catalans 26, 43007 Tarragona, Spain;

  • 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
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