Startup strategy for nitrogen removal via nitrite in a BAF system
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Fecha de publicación
2018-10-26ISSN
1615-7591
Resumen
A biological aerated filter (BAF) pilot plant consisting of two reactors (aerobic and anoxic one) was used to determine a strategy to remove nitrogen via nitrite. RNA/DNA analysis was performed to assess microbial activity and support chemical results. In less than 13 days the pilot plant was able to remove COD and suspended solids. Nitrogen removal via nitrite pathway could not be observed until day 130 when the empty bed contact time (EBCT) was set at 0.71 h. Nitrite was detected in the aerated BAF effluent but never nitrate. qPCR of amoA gene from RNA and DNA extracts of the aerobic biofilm confirmed that ammonia oxidizing bacteria (AOB) were present from the beginning of the operation but not active. AOB activity increased with time, reaching stability from operational day 124. The combination of both, low EBCT together with high OLR, has been demonstrated to be a feasible strategy to startup a BAF to achieve nitrogen removal via nitrite.
Tipo de documento
Artículo
Versión del documento
Versión presentada
Lengua
English
Materias (CDU)
577 - Bioquímica. Biología molecular. Biofísica
579 - Microbiología
Páginas
34
Publicado por
Springer
Publicado en
Bioprocess and Biosystems Engineering
Citación
Gabarró, Jordi, Miriam Guivernau, Laura Burgos, Oswald Garanto, and August Bonmatí. 2018. "Startup Strategy For Nitrogen Removal Via Nitrite In A BAF System". Bioprocess And Biosystems Engineering 42 (2): 233-243. Springer Science and Business Media LLC. doi:10.1007/s00449-018-2028-7.
Program
Sostenibilitat en Biosistemes
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