Leachate Treatment System Using Constructed Wetlands, Town of Fenton SanitaryLandfill, Broome County, New York

摘要

The project consisted of the design and demonstration of an innovative, energy-beneficial treatment alternative for landfill leachate that employed an overland oxidation and precipitation pretreatment step followed by the root-zone treatment method in a constructed wetland. The technique relies on the subsurface retention and degradation of contaminants in a porous medium such as sand. To prevent the medium from clogging, marsh plants are grown in it to develop a rooting system that can maintain the required hydraulic conductivity. By transferring oxygen to their roots, the plants also create multiple aerobic sites in the medium. It therefore passes through aerobic and anaerobic micro-sites which foster the complete decomposition of organic pollutants. The objective of this project was to develop an energy-saving alternative to conventional landfill leachate treatment that can be used by a number of New York State municipalities.