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Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents?

Abstract

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 (4.97-13.45 g NaCl/L) and organic loading rates (OLR, 1.80-6.65 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 (80-90%) which was higher than in R1 with a fully aerobic phase (75-85%). 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.

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  • Authors+Show Affiliations

    ,

    Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Galicia, Spain. Electronic address: paula.carrera@usc.es.

    ,

    Dipartimento di Ingegneria Civile e Ambientale - DICEA, Università degli Studi di Firenze, 50139 Firenze, Italy. Electronic address: riccardo.campo@unifi.it.

    ,

    Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Galicia, Spain. Electronic address: ramon.mendez.pampin@usc.es.

    ,

    Facoltà di Ingegneria e Architettura, Università degli Studi di Enna "Kore'', Cittadella Universitaria, 94100 Enna, Italy. Electronic address: gaetano.dibella@unikore.it.

    ,

    Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Avda. Padre Hurtado 750, Viña del Mar, Chile. Electronic address: jluis.campos@uai.cl.

    ,

    Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Galicia, Spain. Electronic address: anuska.mosquera@usc.es.

    Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Galicia, Spain. Electronic address: mangeles.val@usc.es.

    Source

    Chemosphere 226: 2019 Jul pg 865-873

    MeSH

    Aerobiosis
    Biomass
    Bioreactors
    Denitrification
    Nitrogen
    Phosphorus
    Salinity
    Sewage
    Waste Disposal, Fluid
    Waste Water

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    30978598

    Citation

    Carrera, P, et al. "Does the Feeding Strategy Enhance the Aerobic Granular Sludge Stability Treating Saline Effluents?" Chemosphere, vol. 226, 2019, pp. 865-873.
    Carrera P, Campo R, Méndez R, et al. Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents? Chemosphere. 2019;226:865-873.
    Carrera, P., Campo, R., Méndez, R., Di Bella, G., Campos, J. L., Mosquera-Corral, A., & Val Del Rio, A. (2019). Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents? Chemosphere, 226, pp. 865-873. doi:10.1016/j.chemosphere.2019.03.127.
    Carrera P, et al. Does the Feeding Strategy Enhance the Aerobic Granular Sludge Stability Treating Saline Effluents. Chemosphere. 2019;226:865-873. PubMed PMID: 30978598.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents? AU - Carrera,P, AU - Campo,R, AU - Méndez,R, AU - Di Bella,G, AU - Campos,J L, AU - Mosquera-Corral,A, AU - Val Del Rio,A, Y1 - 2019/03/21/ PY - 2018/11/29/received PY - 2019/03/11/revised PY - 2019/03/19/accepted PY - 2019/4/13/pubmed PY - 2019/6/14/medline PY - 2019/4/13/entrez KW - AOB KW - Aerobic granular sludge KW - Fish canning wastewater KW - Nutrients removal KW - Salinity SP - 865 EP - 873 JF - Chemosphere JO - Chemosphere VL - 226 N2 - 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 (4.97-13.45 g NaCl/L) and organic loading rates (OLR, 1.80-6.65 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 (80-90%) which was higher than in R1 with a fully aerobic phase (75-85%). 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. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/30978598/Does_the_feeding_strategy_enhance_the_aerobic_granular_sludge_stability_treating_saline_effluents L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)30569-7 DB - PRIME DP - Unbound Medicine ER -