Closing the global nutrient loop

Today, common mineral fertilizers are produced from fossil mineral sources which offer an increasingly deteriorating quality and purity. As mineral deposits are depleting and the beneficiation gets more difficult, alternative fertilizers must be developed. CLOOP will demonstrate that a symbiosis between organic farming principles, protection of aquatic bodies and high crop yields is possible.

Recycled fertilizers are using sewage, sewage sludge and sewage sludge ash as raw materials and reuse their nutrients. First tests indicate that recycled fertilizers have a comparable nutrient bioavailability as mineral fertilizers. However, these new products are still largely unknown to the market.