The main objective of this project is to develop and upgrade an existing pilot-scale desalination unit for brackish water within the Water Treatment Laboratory of our institution. Although a pilot system is already available, it requires significant enhancement to meet current challenges related to energy efficiency, operational cost reduction, and field applicability in arid and semi-arid regions. The proposed work focuses on the integration of renewable energy sources, such as solar photovoltaic systems, to ensure a sustainable and autonomous operation of the pilot plant. In parallel, the project aims to incorporate advanced low-energy membrane technologies, including energy-efficient filtration and desalination modules, in order to significantly reduce both investment and operating costs compared to conventional desalination systems. By combining renewable energy and low-energy membrane processes, the upgraded pilot unit will demonstrate a decentralized and scalable solution for brackish water treatment. This approach is particularly relevant for regions facing severe water scarcity, where conventional water supply systems are either insufficient or economically unfeasible. Beyond laboratory-scale development, the project aims to bridge the gap between research and real-world application. The pilot plant is intended to serve as a demonstration platform that can be deployed or replicated in rural agricultural areas of arid and semi-arid countries. Its objective is to provide farmers with a reliable, affordable, and sustainable source of irrigation water derived from locally available brackish groundwater. Ultimately, this initiative contributes to strengthening water security, supporting climate-resilient agriculture, and promoting sustainable water resource management. By reducing dependence on freshwater resources and lowering operational costs, the project offers a practical and innovative solution to address water scarcity challenges in vulnerable regions.