Energy-efficient water reuse system for high-rise buildings utilizing sub-atmospheric pressure and temperature gradients

The rapid expansion of urban areas has created a need for innovative water supply and wastewater treatment solutions in high-rise buildings, focusing on sustainability. This paper presents a novel wastewater treatment system for tall structures that utilizes a vaporization process at sub-atmospheric pressure after initial filtration, enabling the transportation of treated water to upper levels. Key features of this system include the production of high-quality purified water and reduced energy consumption for water distribution. The study details the system’s theoretical performance, including equations and variables such as building height and pipe diameter. Experimental assessments using four-inch and half-inch pipes confirmed that higher pressure differentials improve purification and transfer rates, though at the cost of increased vapor density and energy use. Optimal operational temperatures ranged from 30 to 40 degrees Celsius, enhancing efficiency and cost-effectiveness. A cost analysis further evaluated the feasibility of this wastewater management system in high-rise buildings.