Collection and filtration of rainwater in metalworking

BROEN A/S is a supplier of complete solutions within plumbing installations and a leader in valves for district heating and natural gas. In order to reduce the consumption of drinking water in production, the company began testing a small rainwater collection system with good results.

The system showed good results, which is why they chose to install a WaterCare project-adapted rainwater system, which can hold approximately 30,000 liters of rainwater. The system consists of two specially adapted rainwater tanks of 15,000 liters and a pump well.

Annual water savings
The implementation of a rainwater harvesting system, which collects and filters rainwater for reuse in production equipment, has resulted in annual savings of around 800,000 liters of clean drinking water.

The rainwater is collected from the roof of one of Broen's buildings. To ensure that the water is healthy and clean for their production employees, it goes through a series of filtration processes. This filtration process is crucial to ensuring that their employees have access to healthy and clean water.

The rainwater is pumped through a pump well, and then through a carbon and particle filter, where particles, discoloration and odor are removed from the water. In addition, their production equipment requires the use of demineralized water, which is produced using a reverse osmosis system.

Finally, the water is sterilized through a UV light filter to achieve high water quality without bacteria. The tanks are equipped with an overflow, which is used when the tanks are full. The filtered rainwater is used in the Bridge's "washing machines" to clean metal components

Explore our rainwater systems here .