Research On Carbon Emission Reduction Potential Of Industrial Parks Based On Industrial Symbiosis

Industrial symbiosis is the main feature of the construction of eco-industrial parks.It has a significant effect on improving the efficiency of resource and energy utilization and reducing pollutant emissions.It is one of the main paths for industrial parks to achieve sustainable development.At present,there is a lack of quantitative research on the carbon emission reduction potential brought by industrial symbiosis in the construction of eco-industrial parks.Therefore,under the background of promoting the national eco-industrial demonstration park to achieve carbon peak before 2030 and carbon neutrality before 2060,it is necessary to evaluate the carbon emission reduction potential of eco-industrial parks through industrial symbiosis.Based on the literature review of industrial symbiosis and eco-industrial parks,this paper systematically studies the carbon emission reduction potential of eco-industrial parks from the perspective of industrial symbiosis.The specific research contents and conclusions are as follows :(1)On the basis of fully summarizing the development process of the eco-industrial park and the industrial symbiosis model of the park,the system boundary of the carbon emission reduction potential accounting is determined as the construction scope of the eco-industrial park based on the data availability.Taking industrial metabolism as the starting point,the industrial symbiosis model is divided into : waste resource utilization model,that is,material metabolism model with waste flow as the main line;energy cascade utilization mode,that is,energy utilization according to quality and energy utilization step by step;infrastructure sharing mode,that is,the infrastructure resources can be combined together to achieve maximum use.Combining the three modes with the carbon emission inventory of industrial parks,the influence mechanism of carbon emission reduction in industrial symbiosis is clarified : the waste resource utilization mode mainly promotes carbon emission reduction through energy consumption,industrial process and waste treatment;the energy cascade utilization mode mainly promotes carbon emission reduction through energy consumption;the infrastructure sharing mode promotes carbon emission reduction through energy consumption,industrial process and waste treatment.Combined with the characteristics of the three industrial symbiosis models,this study established a carbon emission reduction potential assessment model for industrial parks based on industrial symbiosis.(2)Select Wuzhong Economic and Technological Development Zone to carry out case studies.The results show that : 1)The carbon emission of Wuzhong Economic and Technological Development Zone has entered a relatively stable state.The carbon emission peaked in 2018,and the carbon emission intensity decreased year by year.2)The power industry,electronic information industry and other industries have always accounted for a large proportion of the total carbon emissions in the park.3)Through the construction of eco-industrial park,the carbon emission reduction based on industrial symbiosis in Wuzhong Economic and Technological Development Zone is 387038 tons.Among them,the carbon emission reductions of the five eco-industrial chains of sewage sludge co-processing,waste mineral oil resource utilization,waste activated carbon resource utilization,hazardous waste solvent resource utilization and thermal power plant steam reuse are 25416 tons,256080 tons,83935 tons,16133 tons and 5474 tons respectively,accounting for6.57 %,66.16 %,21.69 %,4.17 % and 1.41 % of the total emission reduction.The waste resource utilization mode and energy cascade utilization mode can reduce carbon emissions by 377906 and 9133 tons,respectively,accounting for 97.64 % and2.36 % of the total carbon emission reduction.(3)According to the research of this paper,relevant policy recommendations are proposed : 1)Establish a scientific data statistics system based on industrial symbiosis in eco-industrial parks to improve the accuracy of carbon emissions accounting in eco-industrial parks.2)Improve the infrastructure construction of the park and pay attention to the carbon emission reduction effect of infrastructure sharing.3)Promote the construction of eco-industrial parks and give greater play to the role of industrial symbiosis in carbon emission reduction.