Evaluation of circular economy development in typical industrial parks based on material flow and energy flow analysis

The material flow and energy flow analysis methods were used for evaluation of circular economy development in industrial parks, and the evaluation indexes were constructed. Taking Jiangyin High-tech Industrial Park as the research object, a preliminary evaluation of circular economy of the park was carried out, and the effective paths for recycling transformation were proposed by analyzing the material flow and energy flow of each industry in the park. The results showed that the energy productivity of the park was 30 200 yuan/tce (ton of standard coal equivalent), the water resource productivity was 1 257 yuan/m³, and the land productivity was 1 175 million yuan/km², which were relatively low. The comprehensive utilization rate of industrial solid waste was 88.59%, and the comprehensive utilization rates of resources and energy were not high. The relevance of circular economy industry chain was 87.4%, but the industrial development was uneven, and the level of centralized pollution prevention needed to be improved. These were the main factors restricting the development of circular economy in the park. Four aspects of measures, including optimization of industrial structure, improvement of circular economy industrial chain, promotion of efficient use of resources and energy, and promotion of environmental improvement, were put forward to enhance economic, resource and environmental benefits for the park.