Abstract
The findings of composition and flux for landfill gas can indirectly show stabilization of buried wastes and assure safety for the waste landfill site and its surroundings. Presenting reviews and investigations on landfill gas by the authors, this paper discusses some of the problems related to the evaluation of end-of-operation/aftercare and greenhouse gas emissions at waste landfill sites. “Hot spots,” where landfill gases may be leaking out through the surface of the landfill, may indicate the best points for operation and maintenance monitoring. Furthermore, in order to minimize day-to-day variations, the measurement of gas flux should be done over a longer period of time.
The reason for investigating landfill gas composition is not only to gather and analyze information regarding the actual conditions in gas ventilation pipes, but also to observe gases in the waste layer using vertical gas monitoring pipes. In addition, measuring the pH of the leachate and any of the retained water enables for confirmation of acid gas release, such as hydrogen sulfide and carbon dioxide.
