METOD FÖR BESTÄMNING AV NITRIFIKATIONSHÄMNING AV KEMISKAÄMNEN OCH AVLOPPSVATTEN MED EN RENKULTUR AV MIKROORGANISMER / Method for the determination of inhibition of nitrification by chemicals and waste water using a pure culture of microorganisms
A method for the determination of inhibitory effects of chemicals and waste waters on the nitrification processis presented. The method uses pure cultures of microorganisms, which are immobilized on an alginate carrier. The nitrification rate of the test subsrance or waste water, with a maximum concentradon of 90 vol%, is measured during a period of 30 minutes and compared with the nitrification rate ofa reference solution. The methhod shows good agreement with the ISO 9509 standard method, and is more reproducible, fasier and simpler to use.