Hoppegarten, Survey on Air in Stables (Ammonium)
and Pig Slurry (Stickstoff) (nitrogen)


Extracts from the Assessment  of the  Biologisch-Chemischen-Insti­tuts Hoppegarten,

Rennbahnallee 110, D-15366 Dahlwitz-Hoppegarten, Tel. 03342-300698, about the effect of penag-g in husbandry.


Trial Location

2 Pig Sties with each  4 Stables  á 14 Compartments. each: 10 pigs



The Slurry of 1 Sty was treated with PENAC-G, the of the other sty remained without treatment.



During 6 weeks after housing measures of ammonium in the air were taken in both variations.


Ammoniumconcentrationen in the Air after Housing

The above bar graph, plotted at intervals of 2,4,5 & 6 weeks, clearly shows (on the left) the degree to which the ammonia content of the sty treated with PENAC-G was reduced compared to the conventional control (on the right). It shows a 30% decrease of ammonia after 6 weeks.


The significantly reduced levels of free ammonia in the air circulating within the sty, achieved by the use of penac-g, will be of direct benefit to the health of boths the animals and their attendants within the building.


Further positive effects for the animals can be expected  in sties with similar conditions and a longer housing of the pigs due  to the application of PENAC-G. The above survey ran over 6 weeks. From the trend of the graph it follows that even higher rductions will be achieved when PENAC-G is used over a longer period. 



The following graph shows the concentrations of both variations over the 6 weeks housing period of the following parameters: pH, NH4-N, Total Nitrogen (according to Kjeldahl), NO3, NO2, BSB, CSB.


Results of the Slurry Analyses







with penac-g









with penac-g




with penac-g









with penac-g




It will be noted that the Total Nitrogen Content  increased in the sample treated with PENAC-G whereas it decreased in the control, which also released more NH4-N (ammonia) into the atmosphere.

In the PENAG-G treated slurry the Nitrate (NO3) increases,  whereas in  the control  Nitrate Content decreases.  PH-paramteter and the BSB5 show similar behaviour in both variations. The CSB (Chemical Oxygen Demand - the amount of soluble Oxygen [mg/l] needed as chemical oxydation for the degradation of pollutants in a water) of the slurry treated with PENAC-G reduces against a fractional rise in the control. .  The measurements refer to fresh substances, the individaul figures show conditions after 2, 4, 5 and 6.