Phosphorus in biosolids & other residuals
Biosolids contain a relatively high amount of phosphorus (P), one of the major essential plant nutrients. Nitrogen, another major essential plant nutrient, and P provide fertilizing value in biosolids. However, excess P in soils can, in some cases, run off or leach to surface waters, where it harms water quality. Biosolids researchers and managers are furthering the understanding of the complex dynamics of P in soils, in order to further protect water quality. One of the exciting new developments in biosolids management is the removal of excess P at water resource recovery facilities, creating a P-rich fertilizer that can easily be shipped to places where P is needed. This reduces the P in biosolids products, creating a more balanced fertilizer.
"Managing P in Organic Residuals Applied to Soils" - presentations from the UMass/Amherst Extension Symposium, Nov. 2, 2016, Marlborough, MA
The NEBRA office has additional information, references, and referrals.