EVALUATING MITIGATION POTENTIAL AND COST - BENEFIT OF LANDFILL GASES RECOVERING FOR ELECTRICITY GENERATION, CASE STUDY: NAM SON LANDFILL, HA NOI

Abstract

Solid waste disposal (SWD) with organic components under anaerobic conditions will cause greenhouse gas (GHG) emissions. GHG emissions from the waste sector contribute about 6% of the country's total greenhouse gas emissions. One of the mitigation measures applied to closed-down landfills is the installation of piping systems for collecting and burning of landfill gas. This study aims to assess the potential for GHG emission reduction and the cost-benefit of landfill gas recovering for power generation using methodologies developed for CDM projects which has been recognized by the CDM Executive Board (EB); and cost-benefit analysis (CBA). The results show that the GHG emission reduction of this solution is about 0.12 tons CO₂eq/ton of treated waste, equivalent to a reduction of about 57% compared to the baseline. However, this solution is not economically viable with a cost reduction of about 0.54 USD/tCO₂e. The study assessed the potential for GHG emission reductions and the cost benefits of landfill gas recovery solutions for a specific case. However, the parameters and GHG emission factors used for calculation are default. Therefore, more in-depth studies on Vietnam's country specific emission factors for the waste sector are needed in order to achieve more accurate results.