Some observations on free ammonia inhibition to Nitrobacter in nitrifying biofilm reactor |
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Authors: | Yu Liu Bernard Capdeville |
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Affiliation: | (1) Unite de Recherche Traitement Biologique des Eaux, GPI-INSA, omplexe Scientifique de Rangueil, 51077 Toulouse, France |
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Abstract: | Summary Free ammonia inhibition to Nitrobacter population in a nitrifying biofilm was investigated. It was found that when the tree ammonia concentration is greater than 0.1 mgN/l the oxidative activity of Nitrobacter was significantly inhibited, and resulting in a transient accumulation of nitrite ions. The results show that Nitrobacter population is capable of rapidly recovering its lost metabolic activity once the free ammonia concentration becomes less than 0.1 mgN/l, and a complete oxidation of nitrite to nitrate was achieved. |
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