Quantification of Methane Emissions from Landfill Galuga Cibungbulang Bogor West Java

Abstract

Landfill site is one of significant source of methane emissions into the atmosphere. In Indonesia, the quantification of methane emissions from a landfill has not done yet a lot. The purpose of this study is to estimate methane emissions from a landfill in Galuga Cibungbulang, Bogor District, West Java, and its potential as an alternative energy resource. Emissions data which obtained can be used as the material analysis for making construction of the landfill gas treatment system. The approach in this quantification is done in two ways, namely prediction with LandGEM-v302 software and field measurement by flux chamber. The results of simulation LandGEM-v302 are 45.02 Gg total landfill gas emissions per year which consist of CH4 at 12.03 Gg/year, CO2 by 33 Gg/year, and NMOC (Non-Methane Organic Compound) equal to 516.9 Mg/year. The result of field measurement on the landfill surface by the flux chamber as an actual emission is 368.9 Mg CH4 emissions per year. The differences of landfill surface characteristics are greatly affect landfill gas emissions that released into the atmosphere. Humidity conditions or moisture content in the landfill also affect the rate of methane emission. Utilization of methane gas from landfill Galuga into fuel energy power plants are financially able to generate revenue. The potential waste in landfill Galuga contained about 3.1 million tonnes is estimated to generate 2.5 MW of electricity from methane gas treatment with a potential revenue reached to IDR 9.1 billion/year.