RESUMEN
AIMS: To study the effect of pH, temperature and substrate on the magnitude of N(2)O and NO production by heterotrophic nitrifiers. METHODS AND RESULTS: The change in N(2)O and NO production by the heterotrophic nitrifiers Alcaligenes faecalis subsp. parafaecalis and Paracoccus pantotrophus because of variations in pH, temperature and substrate was studied in chemostat cultures under steady-state conditions. N(2)O, NO and CO(2) production increased with temperature between 4 and 32 degrees C. For N(2)O an optimum temperature of 28 degrees C was observed. No optimum temperature was found for NO. Highest N(2)O and CO(2) productions were observed at a pH of 7.0. However, besides having an optimum at pH 7.0, especially NO production but also N(2)O production increased significantly at pH Asunto(s)
Alcaligenes faecalis/metabolismo
, Dióxido de Carbono/metabolismo
, Óxido Nítrico/biosíntesis
, Óxido Nitroso/metabolismo
, Ácido Cítrico/análisis
, Medios de Cultivo
, Concentración de Iones de Hidrógeno
, Paracoccus pantotrophus/crecimiento & desarrollo
, Compuestos de Amonio Cuaternario/análisis
, Temperatura