Zero Liquid Discharge (ZLD) has emerged as a pivotal solution in addressing water scarcity and pollution challenges globally. This research paper explores the concept of ZLD, its significance in the context of sustainable water management, and the technological advancements driving its adoption. By analyzing case studies and current trends, this paper elucidates the growing importance of ZLD as a sustainable approach towards wastewater treatment and resource conservation. The present study is qualitative and data has been collected through many sources i.e., journals, reports, print media, and other government websites. In this research paper researcher discuss about the concept of ZLD, key principle of ZLD, Key Components of Zero Liquid Discharge (ZLD) Systems, ZLD & Conventional Wastewater Treatment Methods, significance of ZLD in Sustainable Water Management, Technological Advancements in ZLD, Future Outlook and Challenges etc.