Agrosistemi in its applied research activity, has come to the formulation of a system for the production of granular defecation gypsum that can reach such a dry substance as to make it baggable.

This procedure, using only lime and sulfuric acid, responds exactly to what is indicated for the gypsum defecation from sludge in column n.4 `` method of preparation and essential components '' of Legislative Decree 75/2010 (annex n.3 , type 23). In fact, significant quantities of sulfuric acid (98% concentrated) and quicklime are used, working on the mud in the dehydrated state (ss 23 - 25% on average).