The best MSW treatment option by considering greenhouse gas emissions reduction: a case study in Georgia

Abstract

The grave concern over climate change and new economic incentives such as the clean development mechanism (CDM) have given more weight to the potential of projects for reducing greenhouse gas (GHG) emissions. In the Adjara solid waste management project, even though the need for reductions in GHG emissions is acknowledged, it is not one of the key factors for selecting the most appropriate treatment method. This study addresses the benefit of various solid waste treatment methods that could be used in the Adjara project in terms of reducing GHG emissions. Seven different options for solid waste treatment are examined: open dumping as the baseline case, four options for landfill technology (no provision of landfill gas capture, landfill gas capture with open flare system, with enclosed flare system and with electricity generation), composting and anaerobic digestion with electricity production. CDM methodologies were used to quantify the amount of reductions for the scenarios. The study concludes sanitary landfill with capture and burning of landfill gas by an enclosed flare system could satisfy the requirements, including GHG reduction potential. The findings were tested for uncertainty and sensitivity by varying the data on composition and amount of waste and were found to be robust.

LandGEM Biogas Estimation, Energy Potential and Carbon Footprint Assessments of a Controlled Landfill Site. Case of the Controlled Landfill of Mohammedia-Benslimane, Morocco

“…In the calculation of greenhouse gas reduction by landfill gas recovery we only considered the amount of CH 4 destroyed. Using a global warming potential (GWP) of 21 for methane and estimating that 80% of methane can be captured through the landfill gas collection system and destroyed in flares, with methane reduction efficiency of 90% in closed flare [Tayyeba et al, 2011, Lattanzi et al, 2020, it is possible to observe the difference between the amount of carbon emitted without the installation of flares and the installation of closed flares (Table 9 and Figure 10).…”

Modelagem da geração de biogás aplicando metodologia CDM para redução de emissões de gases de efeito estufa: estudo de caso do Aterro MTR Santa Maria Madalena, RJ, Brasil

“…O valor dessa constante é estabelecido pela Organização das Nações Unidas (ONU), como: = 21 x , ou seja, o CH 4 é 21 vezes mais nocivo que o CO 2 . É possível capturar cerca de 80% do metano, através do sistema de coleta de gases do aterro, e destrui-los em flares, sendo a eficiência de redução de 90% do metano em flares fechados, e 50% em flares abertos (Tayyeba et al, 2011;UN-FCCC, 2006). Para cálculo de CO 2 e no PE y, foi considerado um cenário de projeto com flares fechados.…”