| Titre : | Two-stage start-up to achieve the stable via-nitrite pathway in a demonstration SBR for anaerobic codigestate treatment (2013) |
| Auteurs : | Nicola Frison, Auteur ; Silvia Lampis, Auteur ; David Bolzonella, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 47, Novembre 2012) |
| Article en page(s) : | pp. 15423-15430 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Anaerobe |
| Résumé : | The supernatant effluent from full scale anaerobic codigestion of waste-activated sludge and the organic fraction of municipal solid waste was treated by a demonstration sequencing batch reactor for short-cut nitrogen removal. After inoculation with conventional municipal activated sludge, the strategy of two-stage start-up allowed us the fast speciation of ammonia oxidizing bacteria (achieved within 20 days), then the achievement of the maximal treatment potential (0.8 kgN m―3 d―1) for nitritation-denitritation. By automatic indirect control of the free ammonia and the free nitrous acid concentrations, the via-nitrite pathway was fully and stably achieved under aerobic conditions (DO of 1.5 mg L―1) and T of 15 °C. Under ordinary operation, the specific nitritation rates were 15―20 mgN gMLVSS―1h―1, while the denitritation rate was 45―50 mgN gMLVSS―1h―1. In-situ and ex-situ respirometry and gene-based molecular techniques demonstrated the stable presence of a dominant, restricted ammonia oxidizing bacterial population after the first-stage aerobic start-up. We therefore demonstrated that codigestion and advanced nitrogen removal from anaerobic supernatant may optimize the performances of an integrated municipal treatment plant. |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=26679662 |
