Effect of the sulfide, pH and temperature on anammox activity in a continuous flow stirred-tank reactor
A new biological process that removes high concentrations of nitrogen from residual waters has been studied for the last twenty years. Such process allows for a substantial reduction on aeration and carbon sources requirements while also producing low levels of biomass. For nine months, a continuum...
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| Formato: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Brasil |
| Recursos: | Universidade Federal de Viçosa (UFV) |
| Repositorio: | LOCUS Repositório Institucional da UFV |
| Idioma: | inglés |
| OAI Identifier: | oai:locus.ufv.br:123456789/7373 |
| Acesso em linha: | http://www.locus.ufv.br/handle/123456789/7373 |
| Access Level: | acceso abierto |
| Palavra-chave: | Águas residuais - Purificação - Tratamento biológico Oxidação Saneamento Ambiental |
| Resumo: | A new biological process that removes high concentrations of nitrogen from residual waters has been studied for the last twenty years. Such process allows for a substantial reduction on aeration and carbon sources requirements while also producing low levels of biomass. For nine months, a continuum reactor composed of a complete mixture with partial nitrification and the anammox process occurring simultaneously was operated with regular mediation and analysis. An evaluation was conducted on short-term effects of sulfide's addition, pH in acidic conditions and the temperature below optimum values of reactor's functioning, as well as its capacity to recover after exposed. The reactor showed sensitivity to small variations on pH. Losses in ammonia removal efficiency were observed when the reactor operated at pH values lower than 6.71 ± 0.01. The tested sulfide concentrations, i.e. 0.1 and 0.25 mg S L -1 , have caused inhibitory effect. The temperature range of 36 - 25 o C did not compromised the reactor's performance. |
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