JH Agro A/S

- Manure Pigs



In the JHacidificationNH4 + plant liquid manure is mixed with sulfuric acid to adjust the pH value from about 7 to 5-6. When the pH value of the manure is lowered ammonia is converted to ammonium. Ammonium does not evaporate, and therefore harmful ammonia volatilization is reduced – by up to 71 %.


Plant components

A JHacidificationNH4 + plant for pigs consists of an acid tank and a process tank, where manure is mixed with sulfuric acid. The plant is connected by pipes to the existing stalls and the manure storage tank on the farm.

The process tank is 4 Meters deep and with concrete ceiling. The size of the process tank  is adapted to the size of the individual farm. Fitting for the stirrer and the pump in the process tank is made in acid-resistant stainless steel.

Treatment process

Manure from the stalls will automatically be pumped into the sump and mixed with sulfuric acid from the tank. The treated slurry is then pumped both in the manure storage tank and back to the stalls to also eliminate ammonia volatilization here.

The treated manure can be distributed directly from the manure storage tank in fields and can increase agricultural output by up to 15%,  because fertilizer value is also improved.

Safety and function

The plant has a verified ammonia emission reduction efficiency and operational stability according to the VERA test protocols for Livestock Housing and Management Systems.

VERA (Verification of Environmental Technologies for Agricultural Production) was established in 2008 in collaboration between the Danish, Dutch and German environmental and agricultural authorities. Read more about VERA here.


  • Reduction of ammonia up to 71 %
  • No limit on protein content of the feed
  • Increased fertilizer value of the manure
  • Rise in agricultural output of up to 15%
  • Manure incorporation into grass fields in principle not necessary
  • Minimum manganese deficiency
  • Less ammonia in the stable air
  • Contributes to the profit of the owner
  • Manure is more homogeneous and easier to handle

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