Abstract
It is still mysterious whether salinity can be an important factor to induce nitrite accumulation in nitrification process. In this study, two airlift reactors with sponge-carriers, fed with an artificial substrate, were operated at 25 and 35°C to investigate the effect of salinity on nitritation. Even though sodium chloride was stepwise increased to 16g Cl.1-1, the nitrite accumulation could not be found. On the contrary, increasing ammonium loading rate under the same salinity condition, nitrite accumulation accompanied with the proliferation of remaining ammonium. From the result, we can conclude that salinity concentration does not playthe important factor for nitritation process.
