Effect of process parameters and operational mode on nitrous oxide emissions from a nitritation reactor treating reject wastewater
Nitrous oxide (N₂O) and methane emissions were monitored in a continuous granular airlift nitritation reactor from ammonium-rich wastewater (reject wastewater). N₂O emissions were found to be dependent on dissolved oxygen (DO) concentration in the range of 1-4.5 mg O₂/L, increasing within this range...
| Autores: | , , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Recursos: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:166591 |
| Acesso em linha: | https://ddd.uab.cat/record/166591 https://dx.doi.org/urn:doi:10.1016/j.watres.2013.11.009 |
| Access Level: | acceso abierto |
| Palavra-chave: | Partial nitrification Reject wastewater Nitrous oxide emissions Continuous vs discontinuous operation Economical analysis |
| Resumo: | Nitrous oxide (N₂O) and methane emissions were monitored in a continuous granular airlift nitritation reactor from ammonium-rich wastewater (reject wastewater). N₂O emissions were found to be dependent on dissolved oxygen (DO) concentration in the range of 1-4.5 mg O₂/L, increasing within this range when reducing the DO values. At higher DO concentrations, N₂O emissions remained constant at 2.2% of the N oxidized to nitrite, suggesting two different mechanisms behind N₂O production, one dependent and one independent of DO concentration. Changes on ammonium, nitrite, free ammonia and free nitrous acid concentrations did not have an effect on N₂O emissions within the concentration range tested. When operating the reactor in a sequencing batch mode under high DO concentration (. |
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