ESTIMATING METHANE EMISSIONS FROM MUNICIPAL SOLID WASTE LANDFILL, CASE STUDY FOR NAM SON LANDFILL, HANOI, VIETNAM

Author: Thi Phuong Hoa Nguyen

Nguyen, Thi Phuong Hoa, 2017 ESTIMATING METHANE EMISSIONS FROM MUNICIPAL SOLID WASTE LANDFILL, CASE STUDY FOR NAM SON LANDFILL, HANOI, VIETNAM, Flinders University, School of the Environment

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Abstract

Greenhouse gas (GHG) emissions associated with solid waste management practices are one of the critical concerns in rapidly developing cities. Landfill sites throughout the world are considered a primary source of GHG emissions, contributing to global warming and climate change. This is due to the existence of methane (CH4) and carbon dioxide (CO2) within landfill gases. The aim of this research is to examine scenarios for municipal solid waste (MSW) management in Hanoi to enable progression towards a low carbon economy. Life Cycle Assessment (LCA) is a method used to evaluate the potential of environmental impacts of landfill regarding CH4 emissions. Based on the framework of LCA, scenarios for MSW management in Hanoi were developed to express possible options for the future management. Potential for CH4 emissions and the variation in generation of CH4 with time for emission inventory in the Nam Son Landfill site in Hanoi, Vietnam were modelled by using two accounting models: the IPCC Default and Triangular model. Five scenarios were designed (S0, S1, S2, S3, S4). The baseline scenario describes the current “Business as usual”, and the rest of the scenarios presented alternative options to explore the potential reduction of CH4 emissions through composting, recycling, and gas capture. The results obtained from the calculation by using two accounting models for all scenarios confirm that a combination of composting, recycling and flaring gas is the best solution to improvement of the existing MSW management in Hanoi by reducing CH4 emissions by 83% in comparison to the “Business as usual” scenario. In addition, the emission process of the Nam Son Landfill site in scenario S4 will reach a peak in 2009, the age of Landfill will extend to 2030.

Keywords: Municipal organic waste, Landfill, Methane emissions, Life Cycle Assessment (LCA), IPCC Default model, Triangular model
Subject: Earth Sciences thesis

Thesis type: Masters
Completed: 2017
School: School of the Environment
Supervisor: David Bass