Dutch household wastewater contains only 2% human waste, such as feces and urine, but this small portion is responsible for a staggering 90% of the organic pollution. By separating this “black” water from the rest of the household wastewater through decentralized sanitation, we can create a relatively clean and reusable water stream, alongside a concentrated stream of organic material.
Benefits of a separated approach
This separated approach offers various benefits. Firstly, the clean water can be reused for different applications after minimal purification, reducing the demand for fresh water. This is especially valuable during times of drought or in areas with limited water resources. Additionally, valuable resources, such as phosphates and nitrogen, can be recovered from the concentrated black water and reused, for example, in agriculture.
Opportunities at larger treatment plants
Even at larger municipal wastewater treatment plants, there are opportunities to reuse the treated water for purposes other than just discharge into surface water. This could include industrial processes, irrigation, or as process water in various sectors. This not only reduces the pressure on our water resources but also contributes to a more sustainable management of wastewater.
Regulation and future perspective
To implement these sustainable solutions on a large scale, it is important that regulations are adapted and encouraged. Current laws and regulations need to evolve to create space for innovative treatment methods and the reuse of wastewater. The government can play a leading role in this by offering subsidies and support to projects that contribute to the circular economy.
Contribution to the circular economy
In short, by smartly separating and treating wastewater, we can recover valuable resources and contribute to a circular economy. This not only results in environmental benefits but can also be financially attractive through savings on water and the recovery of resources. Wastewater thus offers us opportunities for a sustainable and profitable future.