Two New On Site Monitoring Methods for Landfill Methane Emission

Abstract

Landfill methane emission will continue up to several decades after completion of landfilling. Since distribution of the surface methane flux will be highly biased and gas ventilation and leachate collection systems could work as shortcut path, it is difficult to set up enough and/or proper monitoring points to obtain the whole or representative emission at a site. Moreover there is no method which can meet available labor and cost for long-term monitoring. Therefore, there is few monitoring data on methane emission especially in Japan. We are developing monitoring methods for landfill methane emission with less labor. Applicability of the laser methane detector to the closed chamber method was demonstrated at landfills in Japan and Thailand. The monitoring method of methane emission through gas well was also monitored by the landfill gas analyzer at a Japanese site.