This book addresses the integrated optimization of heat and water networks in industrial systems, with a focus on advancing sustainability, resource efficiency, and process performance. It brings together state-of-the-art methodologies and practical strategies for designing, retrofitting, and managing thermal and water subsystems across diverse industrial contexts. Recognizing that heat and water are often treated in isolation despite their interdependencies, the book adopts a unified systems engineering perspective that allows for the identification of synergies, trade-offs, and co-benefits that are critical in modern process industries. With its balanced approach to theoretical modeling and real-world applications, the book supports better decision-making in the design and operation of integrated energy-water systems, ultimately contributing to the decarbonization and circularization of industrial infrastructures. Key Features:Helps engineers design integrated heat and water networks to lower energy and water costs in industrial operationsTeaches how to apply advanced optimization techniques to solve real-world sustainability challenges in process industriesProvides step-by-step methods to retrofit existing plants for improved efficiency without major infrastructure changesEquips professionals to evaluate trade-offs between economic performance and environmental impact in utility systemsOffers practical models for coordinating utilities across multiple plants, supporting eco-industrial park developmentDelivers structured and comprehensive treatment of heat exchanger network synthesis, waste heat recovery, and water reuse optimizationDesigned for a professional and academic audience, this volume provides a valuable reference for chemical and process engineers, industrial sustainability experts, and researchers in process systems engineering.