To achieve the ambitious target of the factory on water consumption of less than 1m³ of water per ton of finished product, the idea was born to start using water in a closed loop. Therefore, Rotselaar plant (Essential Dairy and Plant-Based, Belgium) will install a water purification plant by the end of 2019 to be able to reuse 75% of its water again in the factory. By doing this, the impact of Rotselaar factory on the ground water balance and nearby rivers and creeks will be drastically reduced hereby contributing to a sustainable future.
Why does it matter ?
In a world where water becomes a scarce resource, the water cycle in factories is crucial to deliver qualitative products in a sustainable way.
Through this project, Rotselaar factory will reduce its extraction of ground water out of the ground by 75m³/h or less than 500.000 m³ per year which is the equivalent of the water consumption of a village of 4,000 households.
How does it work ?
By closing the water loop of the factory, instead of being directly returned to the river after treatment at the on-site wastewater treatment plant (in compliance with Danone Clean Water Standards), the water will be purified by a 2-step filtration system. In a first step, all suspended solids will be removed by an ultrafiltration. In a second step, by the technique of reversed osmosis, all minerals and micro-organism will be removed as well. After this step, the water will have the quality of drinking water and can be reused in the water systems of the plant (any additional needed treatment will be applied to ensure the right quality at the point of use).
How it does create value ?
The positive impact on the ground water balance for the region is significant. By being less dependent on an external water supply source, the business will become less impacted by water scarcity.