Nottingham Trent University and Stormsaver Limited KTP 24_25 R1

A single system will turn used water from sinks and showers into drinking water, right where it is collected. Most homes and buildings send greywater—the relatively clean waste from baths, sinks, and washing machines—straight into the sewer. Treating it to a safe standard usually requires large, centralised plants. This project aims to build a compact, modular unit that can do the job on-site, recycling water for reuse in the same building. If it works, the system could dramatically cut the demand for fresh mains water in offices, hotels, and apartment blocks. The potential impact is on the infrastructure that quietly supplies every tap. In water-stressed regions, even a modest uptake of such systems could reduce pressure on reservoirs, treatment plants, and supply pipes. For building owners, it means lower water bills and greater resilience during shortages. The project is applied engineering—it takes existing treatment technologies and packages them into a smart, scalable device. There is no fundamental science here; the challenge is making the system reliable, affordable, and safe enough to meet drinking water standards in real-world conditions.