The promotion of environmental engineering technologies is vital for advancing global sustainable development goals, yet its practical implementation is frequently hindered by complex institutional barriers and systemic deviations. While comprehensive policies and regulations are established to facilitate the widespread adoption of critical technologies—such as green building systems, advanced wastewater treatment, and innovative waste-to-energy solutions—significant gaps persistently remain between original policy intent and real-world execution. This study systematically investigates the underlying institutional constraints and implementation deviations that adversely affect environmental technology promotion through three in-depth case studies: policy design-implementation gaps, regulatory enforcement challenges within industrial sectors, and local government compliance and adaptation mechanisms. Employing a robust mixed-methods approach that seamlessly integrates qualitative case analysis with quantitative policy evaluation, the research critically examines how fragmented governance structures, limited financial and human resources, and contextual mismatches fundamentally undermine the overall effectiveness of existing regulatory frameworks. Findings clearly indicate that while current policies are theoretically sound and well-intentioned, their practical impact is often severely diluted by capacity-resource gaps, procedural complexities, and adaptive behaviors at the grassroots implementation level. Ultimately, this study contributes to both theoretical frameworks and practical understanding by highlighting the critical role of institutional alignment and adaptive governance in enhancing technology dissemination. It offers highly actionable insights for policymakers, environmental engineers, and industry stakeholders aiming to design more resilient, equitable, and context-sensitive strategies for sustainable environmental engineering practices.
