Application Of An IDOM Model With GHG Emission Control For Solid Waste Management In Beijing, China

Beijing is the capital of China with population of more than20million and solid waste production of7million tons per year. Due to the earlier estabilishment of solid waste management systems, Beijing has formed a more comprehensive framework with various treatment facilities than the other cities, and could be a typical representative for chinese urban waste solid management. The solid waste management studies in Beijing can thus be a referential material for other urban cities.In the literature review, this study first discusses the mathematical programming methods for municipal solid waste management. As two categories of optimization methods, certain and uncertain optimal design have been widely investigated for the development and application of municipal solid waste management systems. The studies of municipal solid waste management models with consideration of environmental factors are particularly discussed. In general, the existing municipal solid waste management models has gradually transformed from traditional economic optimization to synthetical management pattern with combination of both environmental and economic benefits, as the latter can much effectively handle the equilibrium between economic and environmental effects in waste management systems.The thesis then analyzes the current status of clean development mechanism (CDM) in Beijing. It is found that the approved methane recycle CDM projects are all for landfill gas, ranking the3th in Beijing with proportion of11.1%. The issue number of landfill gas recycle projects reaches33.3%, which is lower than41.82%of the national level but higher than27.37%of national CDM projects. The China landfill gas model is also applied for predicting the production of landfill gas in Beijing. The results show that the total discharged carbon equivalent will be97million tons. In2015, the discharge will be24216m3/h and the carbon equivalent will be15million tons. It will reach the peak in2026with discharge of54367m3/h and carbon equivalent of22.8million tons. In the period of2013to2040, the predicted carbon equivalent will be52million tons, accounting for53.3%of the total discharge. It is thus concluded that Beijing has to pay attention and promote the solid waste management, which can effectively control the GHG discharge. Meanwhile, the modeled gas production and trend show that improvement of urban solid waste management is imperative, especially focused on GHG emission control.Based on interval dynamic programming, this study integrates GHG components into the optimization modeling framework to establish an IDOM combined with GHG emission reduction. The waste management system in Beijing is selected as an case study. GHG components are introduced into the model to effectively reduce GHG emission. The optimization results show that this model can generate optimal waste distribution strategies for three given periods. Meanwhile, optimal infrastructural expansion schemes are also provided. Compared with traditional programming models without GHG components, this model can simultaneously realize systematical cost reduction and GHG emission reduction. The system cost with an interval of [3.17,3.52] billion dollars can be reduced by [4.5,6.1]%, while GHG emission with an interval of [7.6,8.1] megaton can be reduced by [14.1,17.9]%. In general, this model can integrate waste management optimization and GHG emission reduction, and thus support sustainable development of municipal solid waste management in Beijing.