Research On An Industrial Solid Waste Metabolism System At Aggregated And Disaggregated Levels

Faced with an increasing amount of industrial solid waste(IS W)in the process of rapid industrialization,it is indispensable to carry out IS W metabolism study to realize source and waste reduction.This study models an integrated ISW metabolism framework to explore socio-economic factors of ISW production changes for a case study of Guangdong province,China during 2002-2015.In detail,index decomposition analysis is innovatively conducted to quantify the relative contribution of socio-economic factors to ISW production changes.Waste metabolism input-output analysis is used to reveal internal structure of the system.More specifically,based on a new four-way classification method,components’ dependence on the system is determined by linkage analysis.Using environmental responsibility analysis,their environmental responsibilities are assessed.Moreover,for the peak year 2012 of industrial solid waste production,the ISW metabolism network is developed to examine ISW production and production relationships among different sectors from the view of ecological network.Specifically,the extended methods of network control analysis and network utility analysis are used in the ecological network analysis under two ISW scenarios(i.e.common industrial solid waste(CISW)scenario and hazardous waste(HW)scenario).Furthermore,comprehensive utilization analysis is developed to evaluate the ISW utilization levels and to guide the planning of sectors with large proportion of ISW production.The results show that decreasing ISW generation intensity and further optimizing industrial structure are the only way to Guangdong’s ISW reduction at an aggregated sectoral level.At a disaggregated sectoral level,mining is a key sector and should focus on income-based ISW regulations.Energy and materials transformation sector roles as a direct producer and also has strong linkages to other sectors.As the largest final consumer,the other service sector should consider consuming less ISW-intensive commodities.Meanwhile,the findings for the peak year 2012 indicated that the two types of ISW should be treated differently in future industrial solid waste pollution prevention and treatment.Indirect flow analysis can be used to understand the internal ISW metabolism structure.The mining sectors produce a large amount of direct ISW and perform a low level of comprehensive utilization,but they have mutualism relationships with other sectors.The energy transformation(EH)sector in the CISW system has high direct generation intensity and plays as a main controller.The situation of paper manufacturing(MP)industry in HW system is similar to that of EH.Therefore,it is expected that the results of this study will provide scientific foundations for these sectors to formulate future ISW reduction policies.