Department of Civil and Environmental Engineering, University of New Hampshire, Durham, NH, 03824, USA.
Department of Civil and Environmental Engineering, University of New Hampshire, Durham, NH, 03824, USA.
J Environ Manage. 2021 Jul 1;289:112558. doi: 10.1016/j.jenvman.2021.112558. Epub 2021 Apr 12.
Landfill leachate is commonly treated offsite with municipal wastewater. This offsite leachate treatment may be limited or no longer applicable due to the increasingly stringent regulations and concerns related to per- and polyfluoroalkyl substance (PFAS) discharge into the environment, resulting in development of full-scale, onsite leachate treatment facilities. To help landfills prepare for the potential shift from offsite to onsite leachate treatment for PFAS compliance, this study analyzed and compared the environmental, human health, and economic performances of a typical onsite and a typical offsite leachate treatment alternative through life cycle assessment (LCA) and life cycle cost assessment (LCCA) using a landfill site located in Zhuzhou, China as a testbed. Two distinct functional units (FUs) were investigated: 1 m of leachate treated and 1 g of PFAS removed. Our results show that the onsite scenario offered benefits from human health and economic perspectives, while the offsite scenario generally performed better from the environmental perspective when a leachate PFAS concentration of 150,704 ng/L was assumed. The extent of this tradeoff varied when different functional units were adopted. The onsite scenario will not be competitive from all three perspectives when PFAS concentration in the raw leachate is less than 1666 ng/L.
垃圾渗滤液通常在厂外与城市污水一起处理。由于与全氟和多氟烷基物质（PFAS）排放到环境中相关的法规越来越严格，以及对其的担忧，这种场外渗滤液处理可能受到限制或不再适用，因此需要开发全规模的现场渗滤液处理设施。为了帮助垃圾填埋场为满足 PFAS 合规性而从场外渗滤液处理向现场渗滤液处理转变做好准备，本研究通过生命周期评估（LCA）和生命周期成本评估（LCCA），分析和比较了中国株洲一个垃圾填埋场的典型现场和典型场外渗滤液处理替代方案的环境、人类健康和经济性能。研究考察了两个不同的功能单位（FUs）：1 米渗滤液处理量和 1 克 PFAS 去除量。研究结果表明，从人类健康和经济角度来看，现场方案具有优势，而从环境角度来看，当假设渗滤液中 PFAS 浓度为 150704ng/L 时，场外方案通常表现更好。当采用不同的功能单位时，这种权衡的程度会有所不同。当原渗滤液中的 PFAS 浓度低于 1666ng/L 时，现场方案在所有三个方面都不具有竞争力。
