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Uruguay: Montevideo Landfill Gas Capture and Flare
(Spanish Carbon Fund)

UNFCCC Reference No.: 1349

1 Project Documents

Project Photo 1
Figure 1. Location of Montevideo
The project will contribute to mitigate the GHG emissions through the destruction of the methane contained in the landfill gas (LFG). It is expected that this contribution avoids the emission of 2,383,000 tCO2e to the atmosphere over a period of 21 years starting in 2007. The project activity will generate Certificates of Emission Reductions (CERs) and revenues through the selling of CERs in the Clean Development Mechanism. The revenues obtained will contribute to eliminate the barriers preventing the implementation of this project. The project will be carried out at the Montevideo’s landfill (See Figure 1). The city of Montevideo is the capital of Uruguay, one of the smallest countries in Latin America. The Department of Montevideo concentrates approximately 1,350,000 inhabitants, 40% of Uruguay total population. Both the local government of the Department of Montevideo and the national government’s headquarters are located in this city.

The landfill consists of two main areas: Cells 6/7 and Cell 8. Cells 6/7 have been in operation since 1990 and have approximately 6.7 million tons of MSW in place over an area of approximately 30 ha; Cells 6/7 have a total height of approximately 20-25 m, and have neither a bottom synthetic liner nor a leachate collection system. Cell 8 is in operation since 2002; it has an area of 40 ha and a total capacity of approximately 4 million tons of waste. Up to date, approximately 750,000 tons of MSW have been disposed at this cell. The final height of Cell 8 is expected to reach approximately 30-35 m by 2011.

Assuming a LFG recovery efficiency (RE) of 65 % from 2007 to 2011 and 70% for the following years until 2027, a flare efficiency (FE) of 93.1%, the methane density at 15°C and 101 kPa, a methane content of 50%, and a Global Warming Potential for methane of 21, the estimated annual average project emissions are 59,955 tCO2e/year over the 21-year period starting in 2007. According to information given by the División Limpieza of the Municipality of Montevideo, Montevideo´s landfill is filling at an average of 1,300 tons of MSW per day. Up to date, a total of 6,700,000 tons of MSW have already been disposed in the still active cells 6/7 and another 750,000 in cell 8. SCS Engineers assumes that MSW disposed at Montevideo’s landfill contains more than 58% organic matter of fast degradability rate and approximately 10% of components of middle degradability rate. Using the First Order Decay (FOD), it is estimated that an average of 2,830 m3/h of LFG will be released to the atmosphere during the 21-year crediting period starting in 2007. This estimated value corresponds to an annual average of emissions of 173,447 tCO2e/year and represents the baseline emissions. Thus, the estimated annual average emission reductions for the proposed project activity are 113,492 tCO2e/year over the 21-year crediting period starting in 2007.

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