Nitrite accumulation during denitrification depends on the carbon quality and quantity in wastewater treatment with biofilters.
2015
Rocher, Vincent | Laverman, Anniet M. | Gasperi, Johnny | Azimi, Sam | Guérin, Sabrina | Mottelet, Stéphane | Villières, Thierry | Pauss, André | Laboratoire Eau, Environnement et Systèmes Urbains (LEESU) ; AgroParisTech-Université Paris-Est Marne-la-Vallée (UPEM)-École nationale des ponts et chaussées (ENPC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12) | Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO) ; Université de Rennes (UR)-Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) ; Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) | Centre d'Enseignement et de Recherche Eau Ville Environnement (CEREVE) ; AgroParisTech-École nationale des ponts et chaussées (ENPC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12) | Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB) ; Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) | Laboratoire de Mathématiques Appliquées de Compiègne (LMAC) ; Université de Technologie de Compiègne (UTC) | Transformations Intégrées de la Matière Renouvelable (TIMR) ; Université de Technologie de Compiègne (UTC)
International audience
اظهر المزيد [+] اقل [-]إنجليزي. This study aims to understand the mechanisms of nitrite appearance during wastewater denitrification by biofilters, focusing on the role of the carbon source. Experiments were carried out at lab-scale (batch tests) and full-scale plant (Parisian plant, capacities of 240,000 m3 day−1). Results showed that the nature of the carbon source affects nitrite accumulation rates. This accumulation is low, 0.05 to 0.10 g N-NO2 − per g N-NO3 − eliminated, for alcohols such as methanol, ethanol, or glycerol. The utilization of glycerol leads to fungal development causing clogging of the biofilters. This fungal growth and consequent clogging exclude this carbon source, with little nitrite accumulation, as carbon source for denitrification. Whatever the carbon source, the C/N ratio in the biofilter plays a major role in the appearance of residual nitrite; an optimal C/N ratio from 3.0 to 3.2 allows a complete denitrification without any nitrite accumulation.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل AgroParisTech
