Nitrification inhibition test of high salinity wastewater

Ravi Kumar Chhetri*, Argyro Kokkoli, Sofoklis Karvelas, Henrik Rasmus Andersen

*Corresponding author for this work

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

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Nitrification inhibition test is performed to test if the water received by wastewater treatment plant are toxic to the nitrifying bacteria in the WWTP. Standard test method on nitrification inhibition namely, ISO 9509 or modified ISO 9509 method (REFLAB method) could not differentiate the toxicity between salt and toxicant in the sample. Nitrification inhibition test of saline wastewater was tested using salt-adapted nitrifying bacteria grown on biofilm carriers. Results of nitrification inhibition of samples measured with this method were compared with ISO and REFLAB method for real samples and selected specific chemicals. Standard deviation of the new method for nitrification inhibition at the 50% inhibition level was below 3%. Thus, this method is suitable to test the nitrification inhibition of saline wastewater since it differentiate the toxicity between salt and actual toxicants.
Original languageEnglish
Publication date2019
Number of pages2
Publication statusPublished - 2019
EventDansk Vand Konference 2019 - Århus, Denmark
Duration: 12 Nov 201913 Nov 2019


ConferenceDansk Vand Konference 2019
Internet address


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