The manure and nitrogen problems in agriculture lead to (environment can go away, I think) damage to air, water and soil, as well as continuity problems for many agricultural companies. A large part of the problems with manure and nitrogen arise because manure (thick fraction) and urine (thin fraction) are collected and stored together in stables (slurry). This results in biological and chemical reactions, which lead to the formation and emission of various harmful substances such as nitrogen oxides (NOx) and ammonia (NH3). In addition, emissions also occur when the slurry is spread over the agricultural land. In many countries, including the Netherlands, nitrogen emissions from agricultural slurry lead to legal and environmental problems, particularly with regard to compliance with European environmental objectives and nature protection laws. The RIS3 transition "From a linear to a circular economy" offers opportunities for innovations that can contribute to reducing manure and sl...