NITRIFIKATIONSHÄMNING VID ÖRESUNDSVERKET I HELSINGBORG / Inhibition of the Nitrification Process at Öresundsverket in Helsingborg
The nitrification process at Öresundsverket in Helsingborg was, during a test period of twelve weeks, effected by inhibiting substances. The inhibition was found both in laboratory tests and in full scale at the treatment plant. The laboratory tests performed are based on week samples. Despite dilution of a potential inhibitor in a week sample, two of the week samples caused considerable inhibition. Two other week samples indicated inhibition of the nitrifying bacterias. Laboratory tests have also been performed by Naturvårdsverket and an industry in Helsingborg. The results of these tests showed that all the industrial waste waters investigated contributed to the inhibition of the nitrification process at Öresundsverket.