Circular Economy and Net-Zero Manufacturing: A Data-Driven Multidisciplinary Framework for Sustainable Industrial Transformation

Onyekachi Marcel Egwuagu¹, Charles Chikwendu Okpala², Chukwudi Emeka Udu³

¹ Assoc. Professor, Department of Mechatronics Engineering, Enugu State University of Science and Technology, Nigeria.

² Professor, Industrial/Production Engineering Department, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

³ Researcher, Industrial/Production Engineering Department, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria. 

Abstract

The transition towards sustainable industrial systems requires approaches that simultaneously address climate mitigation, resource efficiency, and economic performance. While circular economy strategies and net-zero manufacturing pathways are widely promoted, they are often implemented in isolation, which limits their overall effectiveness. This study develops and applies a data-driven, multidisciplinary framework that explicitly integrates circular economy principles into net-zero manufacturing planning, enabling the quantification of measurable sustainability benefits across industrial value chains. The framework combines material flow analysis, life cycle assessment, energy–carbon accounting, and multi-objective optimization to evaluate trade-offs among greenhouse gas emissions, energy intensity, material circularity, and cost under dynamic transition scenarios. The framework is applied to representative case applications in metals manufacturing, electronics manufacturing, and process industries with the application of harmonized life-cycle and production data. The results show that integrated circular economy–net-zero strategies outperform isolated interventions, and deliver greenhouse gas emission reductions of 35–62%, energy intensity reductions of 18–41%, and virgin material demand reductions of up to 65% relative to baseline systems. The analysis further demonstrates that moderate improvements in material circularity can generate disproportionately large emissions reductions, particularly as energy systems decarbonize. To capture these dynamics, the study introduces a Dynamic Circularity Index, which reflects how the environmental value of circular strategies evolves over time. Overall, the findings provide robust evidence that circularity and net-zero objectives are mutually reinforcing and that their integration offers a cost-effective and scalable pathway for sustainable industrial transformation. The proposed framework is replicable across sectors and regions, and thus offer actionable insights for manufacturers, policymakers, and researchers who aim to accelerate data-driven transitions towards low-carbon and resource-efficient industrial systems.     

Keywords: Circular economy, Net-zero manufacturing, Sustainable industrial transformation, Life cycle assessment (LCA), Material flow analysis, Industrial decarbonization, Multi-objective optimization 

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