Bacteria help to recycle phosphorus
Biotechnology for the bioeconomy: in something known as the P-bac process, sulphur bacteria extract phosphorus from sewage sludge ash. Phosphorus is one of the key building blocks of life and an essential nutrient for plant growth. When there is not enough phosphorus in the soil, farmers apply it via organic or mineral fertilisers.
https://www.biooekonomie-bw.de/en/articles/news/bacteria-help-recycle-phosphorus