Eliopig - Ammonia Stripping Plant

The plant for nitrates removal exclusively developed by our company, carries out “ammonia stripping” from digestate, which derives from the anaerobic treatment of biomasses and animal manure (biogas plants). The plant of nitrogen stripping allows to reduce more than 60% of the ammonia’s quantity found inside the digestate. This happens through the following steps: 

• The separation of the solid part of slurry (<0,1mm);
• Air/liquid stripping counter-current contact tower;
• Ammonia recovery through absorption of sulfuric acid solution in a scrubber with a production of ammonium sulfate.

The stripping plant for nitrates removal is composed of two columns: the first is dedicated to the ammonia stripping through warm air, while the second one deals with the absorption of stripped off ammonia.