Landfilling is one of the most widely used forms of solid waste disposal, yet the management of landfill leachate is challenging because of the complex composition and high contaminant concentration. This study provides an on-site treatment system to treat 500 m³ day^-1 of the leachate generated from the Perdido Landfill in Escambia County, Florida. The main concerns of the landfill leachate are ammonium-nitrogen, total dissolved solids (TDS) and biological oxygen demand (BOD) from the long-term monitoring (from September 1999 to May 2015). To target these major contaminants as well as other pollutants, we designed a wetland treatment system by fully utilizing the existing facilities at the Perdido Landfill site. The modified wetland treatment system consists of five components in series: leachate collection/aeration ponds, anaerobic ponds, aerobic ponds, wetlands and limestone filter ponds. The leachate collection/aeration ponds provide functions of nitrification as well as ammonia and CO₂ stripping. The following anaerobic ponds focus on nitrogen removal by denitrification. The BOD is removed in the aerobic ponds. The TDS are removed in the wetlands and limestone filter ponds. In the wetlands, 60% of chloride and 40% of other contaminants are absorbed by Parthenium sp. In the limestone filter ponds, bicarbonate, calcium, magnesium and iron are removed.

垃圾填埋是最广泛使用的固体废物处理方式之一，但由于其组成复杂且污染物浓度高，垃圾渗滤液的管理仍面临挑战。该研究提供了一种现场治疗系统来治疗500 m ³天^-1佛罗里达州埃斯坎比亚县Perdido垃圾填埋场产生的渗滤液中的一部分。长期监测（1999年9月至2015年5月）中，垃圾渗滤液的主要问题是铵态氮，总溶解固体（TDS）和生物需氧量（BOD）。为了针对这些主要污染物以及其他污染物，我们充分利用了Perdido垃圾填埋场的现有设施，设计了湿地处理系统。改良后的湿地处理系统由五个部分组成：渗滤液收集/曝气池，厌氧池，好氧池，湿地和石灰石滤池。渗滤液收集/曝气池提供硝化作用以及氨和CO _2的功能剥离。以下厌氧池集中于通过反硝化去除氮。BOD在好氧池中被去除。TDS在湿地和石灰石滤池中清除。在湿地中，Parthenium sp吸收了60％的氯化物和40％的其他污染物。在石灰石滤池中，去除了碳酸氢盐，钙，镁和铁。