How does the OneWater™ system work?
Typical treatment process for greywater system. Biosolids capture (blackwater) process not shown.
- Prefiltration and Equalization
Water collected from showers, sinks, washing machines and other greywater sources is stored in an equalization tank that buffers out flow, reducing the size of the downstream system.
- Biological Treatment
The raw water undergoes biological treatment for removal of organics, known as Biological Oxygen Demand, or BOD.
- Membrane Filtration
Water is then rigorously filtered using membranes with a nominal pore diameter of .04 microns.
- Disinfection and Heat Recovery
Before pumping for reuse in the building, water undergoes multiple steps of disinfection via ultraviolet light and chlorine, which render the water safe for reuse in non-potable applications. If heat recovery is included, the system will capture energy from wastewater and use it to pre-heat domestic hot water, resulting in lower heating costs for the building.
The OneWater™ system safely treats and recycles water onsite for non-potable reuse applications like toilet and urinal flushing, cooling tower makeup, irrigation, and clothes washing. Leveraging a multi-barrier approach that includes ultrafiltration membranes and state of the art disinfection systems, the OneWater™ system produces a highly purified final product that is guaranteed to meet regulatory requirements for interior and exterior recycled water reuse, meeting disinfected tertiary reuse effluent standards.
