Modelling and Optimizing Resource Management and Environmental Benefit of Construction and Demolition Waste: A Case Study in China

Abstract

With the continuous promotion of urbanization, the generation of construction and demolition waste (CDW) is increasing. The environmental problems and safety hazards caused as a result need to be resolved. In this paper, based on the system dynamics (SD) theory, the modeling, the cost, and the environmental benefit of CDW resource management under the life cycle assessment (LCA) are proposed. Specifically, we propose a combined policy derived through three variables, namely, fines, subsidies, and charges. The target is to reduce illegal dumping behavior and landfill volume and to improve the recycling volume and environmental benefits. The model is constructed with the help of the software VENSIM, and the validity and feasibility of the model are demonstrated with data from Nantong City. The results show that a single policy cannot simultaneously improve environmental benefits, illegal dumping, recycling, and landfill behavior. A combined policy combines the advantages of three single policies, fines, subsidies, and charges, which not only can effectively curb illegal dumping and landfill disposal under the premise of prioritizing environmental benefits, but can also promote the recycling of CDW. The reasonable range for the fine is 300–350 CNY/ton; the rational range for subsidies is 30–40 CNY/ton; and the flexible range for treatment charge is 40–80 CNY/ton. The model can be used for the quantitative assessment of urban CDW management costs and environmental benefits and can also provide a theoretical basis for the government.

A fuzzy overlapping project resource optimization model in the project construction industry, using a fractal method

“…Objective functions optimize cost and merit simultaneously. Based on system dynamics theory, modeling, cost, and environmental benefits of construction and demolition waste resource management under life cycle assessment are proposed by Sun et al [6]. The results demonstrate that a single policy cannot simultaneously improve environmental benefits, illegal dumping, recycling, and landfill behavior.…”

A Many-Objective Optimization Model for the End-of-Life of Buildings

“…For instance, (Al Zaghrini et al, 2019) propose an optimization based decision support tool to select an abandoned quarries to serve as waste land lls and processing facilities; the model combines GIS and a mixed integer linear program to optimize cost and environmental impact. (Sun et al, 2022) considers the cost, and the environmental bene t of waste resource management under the life cycle assessment to optimize economic policy (taxes, nes and subsidies). In a close perspective, (T. proposes a model to optimize the waste management fee considering life cycle environmental impacts and society's willingness-to-pay.…”