Waste valorizationWaste valorization plays a critical role in achieving sustainable developmentSustainable development through the circular economyCircular Economy (CE) (CE). A closed-loop system, CE provides a broader framework for achieving sustainabilitySustainability by recycling used materials/products before they are discarded, allowing waste to be reused as a resource. CE serves as the foundation for the regenerative economy and comprises a wide range of business models, including resource reuse, product-as-a-service, sharing economies, reverse logistics, and industrial symbiosisIndustrial symbiosis. Valorization provides a practical method for resource reuse by converting various types of waste into valuable materials, energy, or products. This placed waste valorizationWaste valorization into the very center of sustainable developmentSustainable development propositions. The current technological development also drives greater sustainable resource reuse through a waste-to-wealthWaste-to-wealth approach. Digital and innovative technologies, including the Internet of Things (IoT), artificial intelligence (AI), blockchain, robotics, and digital twins, are changing the paradigm of waste managementWaste management and valorization by enabling traceability, predictive analytics, and optimizing processes. These technologies not only enhance the efficiency of material recovery and recycling but also shape new value generation across value chains. In this chapter, efforts are made to explore how waste valorizationWaste valorization, supported by CE strategies and digital transformation, can create a framework for systemic change toward environmental resilience and economic competitiveness.