This paper presents a novel approach to integrating PV technology with WWTPs infrastructure. Toward improving system efficiency and reducing operating costs. . Because solar adoption at wastewater treatment plants is still relatively new, there is little known about these facilities, including where they are, what drove them to choose solar, and if solar has been a success. It provides an efficient, sustainable power source to keep this critical infrastructure operating at a lower. . Researchers at Stanford University have even developed an innovative battery technology that can harness the energy from the mixing of salty ocean water and freshwater, further enhancing the renewable energy capabilities of coastal wastewater treatment facilities. As a result, these modules are getting cheaper. Furthermore, wastewater treatment plants (WWTPs) are. . Within the industry's transition to a circular economy, sustainable wastewater treatment and recovery should be reached without excessive strain on limited energy supplies and by decreasing fossil energy consumption.