The studies carried out draw the following conclusions:

• Slurry acidification reduces ammonia emissions on farms, storage facilities and in soil application.

• Frequent adjustment of slurry pH on pig farms reduces ammonia volatilization by 70%.

• Ammonia losses during slurry storage are reduced by around 50% compared to stored slurry untreated with a natural crust.

• Purification acidification reduces the volatilization of ammonia during and after application in the field.

• During acidification, CO2 and H2S levels increase, but decrease during storage, so there are no significant differences if the whole process is taken into account.

• Different studies show a decrease in methane production between 67 and 90%
(Source: MAGRAMA)

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