|   | 
Author Carrera, P.; Campo, R.; Mendez, R.; Di Bella, G.; Campos, J.L.; Mosquera-Corral, A.; Val del Rio, A.
Title Does the feeding strategy enhance the aerobic granular sludge stability treating saline effluents? Type
Year 2019 Publication Chemosphere Abbreviated Journal Chemosphere
Volume 226 Issue Pages 865-873
Keywords Aerobic granular sludge; Fish canning wastewater; Nutrients removal; Salinity; AOB
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/(m(3).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 SRT5 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 (PADS), 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. (C) 2019 Elsevier Ltd. All rights reserved.
Address [Carrera, P.; Mendez, R.; Mosquera-Corral, A.; Val del Rio, A.] Univ Santiago de Compostela, Sch Engn, Dept Chem Engn, E-15782 Santiago De Compostela, Galicia, Spain, Email: paula.carrera@usc.es;
Corporate Author Thesis
Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0045-6535 ISBN Medium
Area Expedition Conference
Notes WOS:000468709500094 Approved
Call Number UAI @ eduardo.moreno @ Serial 1020
Permanent link to this record