Sustainability Report FY 2021

89 RUFFINO | Sustainability Report FY 2021 The estates in Tuscany 33% irrigated surface It is expected that approximately 33% of the sur- face area of the estates in Tuscany will become irrigated, ensuring a sufficiently stable level of production, even despite the variable weather conditions. A precision irrigation (Variable Rate Irrigation) process has been started on the Gretole estate, aimed at using water in an increasingly effecti- ve way, given the scarce water availability for irrigation. The irrigation technology that will be adopted in the years to come will enable differing amounts of water to be dispersed based on the type of soil and the actual water requirements. Irrigation on the estates, now and in the afo- re-stated projects, mainly takes place by using rainwater collected in artificial basins and only limited to water from wells. Moving forward, we are considering a direction aimed at reuse and recycling the water from the cellar wastewater treatment systems (“constructed wetlands”) for the purposes of irrigation and cleaning (vehi- cles and plazas). To proceed in this way, further analysis will be required to ensure full complian- ce with the parameters stated in the Italian Legi- slative Decree 152/2006 21 . Wastewater treatment Regarding wastewater management, we have in- stalled two purifiers and three constructed wet- lands aimed at responsible water management. The purification systems have been installed in the Pontassieve plant of Ruffino S.r.l and in the San Donà plant of Poderi Ducali S.r.l. They consist in organic purification systems that combine a membrane separation system with the traditio- nal active mud purification process; the membra- ne system separates organic mud from the rest of the clarified or treated wastewater. The systems consist in equalization tanks aimed at making the concentration of pollutants as con- stant as possible ahead of the subsequent steps in the treatment as well as organic treatment tanks, which contain the post-equalization fluids and filter the water to remove the remaining solid particles. After filtration, mud is added, which contains bacteria that feed on the chemical sub- stances in the wastewater, releasing clean water. The latter is stored in a tank before being chan- neled back into the municipal sewers. 21 Testo Unico Ambientale (the Italian Code on the Environment).