the anaerobic digestion of pig manure. The mode of operation (process,
temperature) along with the acclimation of biomass at higher
ammonia concentrations ensured a high-stabilization of the digestion
process without inhibition and thus VFA components did not
accumulate in the digester. The possible inhibition by FAN was
insignificant for the studied period and an extensive research is
necessary to obtain the inhibitive threshold level of FAN in
PADSBR.