Process and Water Company says its rooftop rainwater reclamation and reuse system at a US Marine Corps facility has helped it reduce its water use 40 percent compared to a building with traditional water systems.
The rainwater harvesting system (pictured), developed and supplied to the US Marine Corps for its Bachelor Enlisted Quarters at Marine Corps Air Station Cherry Point, contributed to the facility earning a LEED Gold certification from the US Green Building Council, the company says.
Process and Water worked closely on the system’s design and deployment with Haskell, an integrated design-build firm and project lead for the new facility, and its subcontractors.
The Process and Water system harvests rainwater by collecting it from the roofs of each of the facility’s buildings and centrally storing it. After it is collected, the water is sent through a storm filter that removes organic debris such as fallen leaves, and then transferred into a 10,000-gallon underground storage tank.
After the tank reaches capacity, any additional rainwater is handled by an overflow system that is tied into the project’s storm drain system. The system pumps the previously filtered rainwater through a specialized micron filter subsystem, and then sends it to a 500-gallon day tank. There, another pump constantly cycles the water through a UV sterilization system that yields bacteria-free water.
The twice filtered and UV-sterilized water is utilized to flush toilets and for a variety of other non-potable uses throughout the facility.
Earlier this year, Sainsbury’s reduced its operational water use 50 percent relative across its stores, against a 2005-06 baseline, employing a number of measures including rainwater harvesting.