Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents?
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Título: | Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents? |
Autor/a: | Carrera Fernández, Paula Campo, Riccardo Méndez Pampín, Ramón José Di Bella, Gaetano Campos Gómez, José Luis Mosquera Corral, Anuska Val del Río, María Ángeles |
Centro/Departamento: | Universidade de Santiago de Compostela. Departamento de Enxeñaría Química |
Palabras chave: | Aerobic granular sludge | Fish canning wastewater | Nutrients removal | Salinity | AOB | |
Data: | 2019 |
Editor: | Elsevier |
Cita bibliográfica: | Carrera, P., Campo, R., Méndez, R. et al. (2019). Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents?. Chemosphere 226, 865-873. doi: 10.1016/j.chemosphere.2019.03.127 |
Resumo: | The development and stability of aerobic granular sludge (AGS) was studied in two Sequencing Batch Reactors (SBRs) treating fish canning wastewater. R1 cycle comprised a fully aerobic reaction phase, while R2 cycle included a plug-flow anaerobic feeding/reaction followed by an aerobic reaction phase. The performance of the AGS reactors was compared treating the same effluents with variable salt concentrations (4.97e13.45 g NaCl/L) and organic loading rates (OLR, 1.80e6.65 kg CODs/(m3 $d)). Granulation process was faster in R2 (day 34) than in R1 (day 90), however the granular biomass formed in the fully aerobic configuration was more stable to the variable feeding composition. Thus, in R1 solid retention times (SRT), up to 15.2 days, longer than in R2, up to 5.8 days, were achieved. These long SRTs values helped the retention of nitrifying organisms and provoked the increase of the nitrogen removal efficiency to 80% in R1 while it was approximately of 40% in R2. However, the presence of an anaerobic feeding/reaction phase increased the organic matter removal efficiency in R2 (80e90%) which was higher than in R1 with a fully aerobic phase (75e85%). Furthermore, in R2 glycogen-accumulating organisms (GAOs) dominated inside the granules instead of phosphorous-accumulating organisms (PAOs), suggesting that GAOs resist better the stressful conditions of a variable and high-saline influent. In terms of AGS properties an anaerobic feeding/ reaction phase is not beneficial, however it enables the production of a better quality effluent |
Versión do editor: | https://doi.org/10.1016/j.chemosphere.2019.03.127 |
URI: | http://hdl.handle.net/10347/21982 |
DOI: | 10.1016/j.chemosphere.2019.03.127 |
ISSN: | 0045-6535 |
E-ISSN: | 1879-1298 |
Dereitos: | © 2019 The Authors. Open Access. Published by Elsevier Ltd. This article is available under the Creative Commons CC-BY-NC-ND license and permits non-commercial use of the work as published, without adaptation or alteration provided the work is fully attributed |
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