Circular Economy Explained: Industrial Ecology, Sustainability & Resource Systems

Circular Economy Explained: Industrial Ecology, Sustainability & Resource Systems is an open-access, rigorous undergraduate-level engineering curriculum module designed for engineering students, sustainability analysts, and industrial systems practitioners. Aligned with core ABET and CEAB environmental, chemical, and industrial engineering syllabi, this module provides an in-depth systems analysis of industrial metabolism, Material Flow Analysis (MFA), Life Cycle Assessment (LCA), and closed-loop industrial symbiosis networks.

Curricular & Technical Highlights:

• Functional System Architecture: Employs an IDEF0 (Input-Control-Output-Mechanism) workflow to demonstrate how mass and energy flow inventories, by-product streams, and lifecycle data are transformed under circular economy principles and environmental regulations into actionable closed-loop engineering designs.
• Material Flow Analysis & Circularity Metrics: Detailed analytical formulation of the Ellen MacArthur Foundation Material Circularity Indicator (MCI), Linear Flow Index (LFI), and utility scaling functions for industrial alloy streams.
• Thermodynamics & Exergy Cascading: Quantitative modeling of waste heat steam recovery, exergy preservation in secondary mechanical smelting vs. primary refining, and Zero Liquid Discharge (ZLD) membrane loops.
• Industrial Symbiosis & Eco-Industrial Parks: Systemic review of multi-enterprise resource cascading, drawing on global benchmarks such as the Kalundborg Symbiosis in Denmark.
• Comparative Systems Engineering: A multi-criteria systems trade-off matrix evaluating mechanical closed-loop recycling, chemical depolymerization/pyrolysis, industrial waste heat cascading, Zero Liquid Discharge (ZLD), and anaerobic digestion bio-nutrient loops across mass recovery, energy savings, and contamination risks.
• Worked Quantitative Engineering Problems: Step-by-step numerical calculations covering manufacturing Material Recovery Rates (MRR), waste heat steam carbon offsets, primary vs. secondary aluminum exergy savings, anaerobic digester biomethane yields, Product-as-a-Service (PaaS) asset demand reductions, ZLD wastewater cost-benefit balances, and urban mining precious metal extraction.
• Self-Assessment & Concept Review Modules: Comprehensive interactive review questions, analytical scenario investigations, and quantitative problem sets.

Canonical web edition and interactive dynamic simulators: https://prep4uni.online/stem/physical-technologies/environmental-engineering/industrial-ecology-and-circular-economy/