A circular urban metabolism (CUM) framework to explore resource use patterns and circularity potential in an urban system. (20th July 2022)

• Record Type: Journal Article
• Authors: Cui, Xuezhu
• Is Part Of: Journal of cleaner production. Volume 359(2022)
• Publication Date: 2022-07-20
• Subjects: Circular urban metabolism -- Material flows -- Resource use patterns -- Urban systems -- Sustainability; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2022.132067
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Urban areas with large population and economic activity are responsible for the increased resource and environmental challenges, making circular economy an important issue. Sustainable development and targeted suggestions for local areas are essential for policy implementation. In this study, a circular urban metabolism (CUM) framework was developed to assess resource use patterns for potential identification and policy initiatives of circular development. The framework was conceived as a circular process for sectoral material flow mechanisms, which was followed by resource use calculations and circularity potential analysis. In the Shanghai case, the CUM framework was testified and revealed dramatic increases of material inputs and outputs, doubled during 2000–2019. Close relationship with external areas was indicated by large resource consumption and pollution discharge. Specified by CUM, the expanded in-use stock, mainly consisted of non-metallic minerals used in construction sector, were one of the obstacles towards circularity. Energy-induced pollution was the other obstacle, which were suggested by mixed energy use initiatives. Sectoral policy to improve resource use patterns were finally provided at the city level. Highlights: A circular urban metabolism framework was developed to reveal resource use patterns. The sectoral circular potential was investigated based on the material flow analysis. Both the material inputs and outputs doubled from 2000 to 2019 in Shanghai. The material consumption and pollution discharge were related to the external parts. The enlarged in-use stock and fossil fuel use were the main obstacles to circularity.