Evaluation of the Use of a Material with Struvite from a Wastewater Treatment Plant as N Fertilizer in Acid and Basic Agricultural Soils

Struvite (MgNH4PO4 ∙ 6H2O) has been widely studied as an emerging recycled phosphorous fertilizer despite its low solubility. However, there are few studies on the use of this mineral N fertilizer. This article evaluates two powder struvite-containing materials from wastewater treatment in agricultural soils. A 9-week soil incubation experiment was conducted to compare effectiveness soils with different pH values (8.2 and 6.7), using doses a control soil. The these positive effect fertility, especially acidic where struvite seems be more soluble. Thus, can potential for promote circular economy opportunities industry, acid (concentrations between 453–339 mg/kg were obtained mixtures soil, 408–212 basic after 6 weeks incubation). associated process, increase salt content observed (EC reaching 3.9 dS/cm 2.8 nine Therefore, parameter should controlled case continuous applications amendments, conditions poor drainage and/or non-percolating water regime, since it limiting factor crop development. These processes detail future considering that cycle significant impact chemistry fertility microbiological community.