In order to avoid greenhouse gas emissions, mainly ammonia and volatile organic compounds, we can acidify the slurry. With this we fix the ammoniacal nitrogen and in this way we partly avoid its volatilization.

The studies carried out draw the following conclusions:

• Slurry acidification reduces ammonia emissions on farm, storage facilities and in land application.
• Frequent pH adjustment of slurry on pig farms reduces ammonia volatilization by 70%.
• Ammonia losses during slurry storage are reduced by around 50% compared to slurry stored without treating with a natural rind.
• The acidification of the slurry reduces the volatilization of ammonia during and after its application in the field.
• During acidification, the levels of CO2 and H2S increase, but they decrease during storage, so there are no significant differences if the entire process is taken into account.
• Different studies show a decrease in methane production between 67 and 90% (Font MAGRAMA)