Proposal of a Mathematical Optimization Model as a Theoretical Framework for the Introduction of CCUS Technologies into Waste Treatment Facilities

Abstract

The objective of this study is to develop a theoretical framework for quantitatively deriving the ideal state of the introduction of CCUS technologies in the waste sector in a carbon cycle that satisfies carbon neutrality, including carbon sources other than waste. For this purpose, the following mathematical optimization problem is formulated in this study. The objective function is "Annual system costs," the main constraints are "Conservation of mass," "Upper supply limit for storage and utilization technologies," and "zero CO₂ emissions," and the variables are "Amount of MSW treated by composition and treatment technology," "Carbon flow by origin," and "Facility installation amount”. The analysis was conducted under hypothetical conditions assuming incineration, gasification, and anaerobic digestion as waste treatment technologies, and methane synthesis and fixation in concrete as applications of CCU technologies. In the future, we will expand the time scale, waste treatment and CCU technologies, refine the inventory data for each technology, and implement this model with real space as input.