The Effect of Untreated and Acidified Biochar on NH3-N Emissions from Slurry Digestate

The development of new options to reduce ammonia (NH3) emissions during slurry manure storage is still required due the shortcomings current technologies. This study aimed identify what extent untreated and acid-treated biochar (BC) pure acids could nitrogen (NH3-N) volatilization increase retention in digestate. NH3-N were effectively reduced by H2SO4 H3PO4 acids, BC when applied mixed into digestate acidified treatments on surface Acidification increased specific area number O-containing functional groups decreased pH, alkalinity hydrophobic property. Compared BC, ability was greater it with surface. effect pH not different, except for H2O2, from that addition respective acid total N concentration significantly correlated emissions. These findings indicate be an effective conditioner storage.