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Bilevel programming methods in waste-to-energy plants' price-setting game

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Abstract

This paper deals with the problem of waste treatment pricing in the waste-to-energy (WtE) plants' network. The correct and stable estimate of gate fees should ensure efficient and financially sustainable waste energy recovery. The main contribution is a new price-setting approach, combining bilevel optimization techniques and game theory. The proposed approach dwells on two challenging steps. The first step is to solve the bilevel program, where the WtE plant on the upper level maximizes its income by setting the optimal gate fee, whereas waste producers on the lower level minimize the sum of their waste treatment costs. This optimization problem considers cities' waste production amounts, WtE plants' capacities, and locations. The novel heuristic algorithm, which can handle this bilevel program time-efficiently, is presented. It is based on the reformulations of bilevel problems of highway networks and pricing. The functionality of the heuristic has been validated using artificial waste management network scenarios. The second step is to establish the stable gate fee outcome in the waste management network, where numerous WtE plants are presented. This task is reformulated as a search for the Nash equilibrium in a normal-form game. The best-response dynamics algorithm enables establishing the game's equilibrium with numerous WtE plants and continuous strategy sets. The potential application of the proposed approach is demonstrated in the exemplary problem motivated by the Czech Republic. The found stable gate fee outcome is then used to estimate the optimal capacity of the prepared WtE facility project and ensure its financial viability in the existing waste management network.

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Acknowledgements

The authors gratefully acknowledge the financial support provided by the Technology Agency of the Czech Republic, Grant No. SS02030008 “Center of Environmental Research: Waste management, circular economy and environmental security”. This work was supported by FME BUT within the research project No. FSI-S-20-6187, by Grant No. GA 20-00091Y “Development of Sustainable Waste Management: Methods and Operations Research Perspectives” of the Czech Science Foundation and by the by the Tomas Bata University under project no. FSR FORD 5-6/2022-23/FLKŘ/001 Sustainability in Transport: Modern Trends and their Impact on the Environment.

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Correspondence to Dušan Hrabec.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. The authors declare the following financial interests/personal relationships which may be considered as potential competing interests.

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Eryganov, I., Šomplák, R., Hrabec, D. et al. Bilevel programming methods in waste-to-energy plants' price-setting game. Oper Res Int J 23, 32 (2023). https://doi.org/10.1007/s12351-023-00775-9

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  • DOI: https://doi.org/10.1007/s12351-023-00775-9

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