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Study on the selection of equity structure of PPP waste-to-energy projects from the perspective of sustainable development

The equity structure of Public-Private Partnership (PPP) projects reflects the interests of the public and private sectors, and concerns the economic, social and environmental performance of projects. In the context of the global promotion of sustainable development, optimization of equity structure from a sustainable perspective is very important for improving the sustainable performance of PPP projects. However, in the existing research, there is no quantitative model for selecting equity structure of PPP projects with the goal of improving sustainability. To address the research gap, a multi-objective programming model is developed to seek the balance of economic, social, and environmental performance of PPP projects and its rationality and practicability are verified using a case of a waste-to-energy PPP project. The study proposes a quantitative model of equity structure selection to achieve sustainability goals for PPP projects and the results are helpful for government decisions on promoting the sustainability of PPP projects.