Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.6/1957
Título: Biological and technical study of a partial-SHARON reactor at laboratory scale: effect of hydraulic retention time
Autor: Gonzalez-Martinez, A.
Calderon, K.
Albuquerque, António
Hontoria, E.
Gonzalez-Lopez, J.
Guisado, I.
Osorio, Francisco
Palavras-chave: SHARON process
Nitrificação
Partial nitrification
Tratamento de águas residuais
Submerged biofilter
Biofilters
Remoção de azoto
Nitrogen removal
Hydraulic retention time
Biofilm reactors
Data: Fev-2013
Editora: Springer
Resumo: This study was on the technical and biological characteristics of a partial-SHARON submerged-filter bioreactor of 3 L. The main focus was the influence of the hydraulic retention time (HRT) on biofilms. For this purpose, we used molecular tools based on the partial 16S rRNA genes. The results showed that the HRT may affect the nitrification processes of a bioreactor using synthetic wastewater containing 600 mg/L of ammonia. It was found that an HRT of 0.5 day transformed 100 % of the ammonium into nitrite. However, when the HRT was decreased to 0.4 day, there was a significant reduction (35 %) in the quantity of ammonia transformed, which confirmed the complexity of the system operation. Moreover, a PCR-TGGE approach highlighted the differences observed. The results obtained showed that an HRT of 0.5 day reduced bacterial biodiversity in the biofilms, which were mainly formed by Nitrosomonas and Diaphorobacter. In contrast, an HRT of 0.4 day facilitated the formation of heterogeneous biofilms formed by nitrifying bacteria, such as Nitrosomonas sp., Nitrosospira sp., and Nitrosovibrio sp.).
Peer review: yes
URI: http://hdl.handle.net/10400.6/1957
ISSN: 1615-7591
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