It is the commercial name of the agricultural corrective product, belonging to the type of national fertilizer '' gypsum for defecation from sludge '', defined by the Italian Law D.Lgs. 75/2010.

It is produced by:

  • hydrolysis of biological sludge proteins with calcium oxide
  • introduction of sulfuric acid for the precipitation of calcium sulphate (BIO SOLFATO)
  • integration with additives
  • possible pre-treatment extraction of unwanted metals or anions by acid washing
  • eventual pretreatment of reduction of organic pollutants through the Fenton process