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Effects of high-concentration influent suspended solids on aerobic granulation in pilot-scale sequencing batch reactors treating real domestic wastewater.
Water Res 2018; 131:74-89WR

Abstract

The aim of this study was to investigate the effect of high-influent-concentration suspended solids (SS) on the cultivation, structure and long-term stability of aerobic granular sludge (AGS). Cultivation and long-term stability of AGS were monitored in two pilot-scale sequencing batch reactors fed with raw (R1) and settled (R2) domestic wastewater, representing high and medium SS content, respectively. The real domestic wastewater had high chemical oxygen demand (COD) content (1100 ± 270 mg COD L-1). Aerobic granular sludge was cultivated in 44 days (R1) and 25 days (R2) under the conditions of high settling velocity (18 m h-1) and high organic loading rate (OLR) (2.1-2.4 kg COD m3 day). The AGS in both reactors had similar structural properties during long-term operation and remained structurally and functionally stable during the last five months of operation. Comparative evaluation of the results indicated that the high influent SS content of the real domestic wastewater had a positive influence on maintaining significantly lower SVI30 and relatively lower effluent SS concentration. Moreover, a higher influent SS content resulted in smaller mature granules during the stable period. Microbial community analyses helped to understand the aerobic granular sludge structure and showed that the sludge retention time and OLR affected the granular sludge population. The high influent SS increased biomass detachment from the granular sludge surface and caused wash-out of some bacteria colonizing the exterior of the granular sludge.

Authors+Show Affiliations

Istanbul University, Faculty of Engineering, Environmental Engineering Department, Avcilar 34320, Istanbul, Turkey.Istanbul University, Faculty of Engineering, Environmental Engineering Department, Avcilar 34320, Istanbul, Turkey.Istanbul Technical University, Faculty of Civil Engineering, Environmental Engineering Department, Maslak 34469, Istanbul, Turkey.Istanbul Technical University, Faculty of Civil Engineering, Environmental Engineering Department, Maslak 34469, Istanbul, Turkey.Bioeksen R&D Ltd. Co., Maslak 34469, Istanbul, Turkey.Istanbul University, Faculty of Engineering, Environmental Engineering Department, Avcilar 34320, Istanbul, Turkey. Electronic address: gulsum@istanbul.edu.tr.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

29275102

Citation

Cetin, Ender, et al. "Effects of High-concentration Influent Suspended Solids On Aerobic Granulation in Pilot-scale Sequencing Batch Reactors Treating Real Domestic Wastewater." Water Research, vol. 131, 2018, pp. 74-89.
Cetin E, Karakas E, Dulekgurgen E, et al. Effects of high-concentration influent suspended solids on aerobic granulation in pilot-scale sequencing batch reactors treating real domestic wastewater. Water Res. 2018;131:74-89.
Cetin, E., Karakas, E., Dulekgurgen, E., Ovez, S., Kolukirik, M., & Yilmaz, G. (2018). Effects of high-concentration influent suspended solids on aerobic granulation in pilot-scale sequencing batch reactors treating real domestic wastewater. Water Research, 131, pp. 74-89. doi:10.1016/j.watres.2017.12.014.
Cetin E, et al. Effects of High-concentration Influent Suspended Solids On Aerobic Granulation in Pilot-scale Sequencing Batch Reactors Treating Real Domestic Wastewater. Water Res. 2018 03 15;131:74-89. PubMed PMID: 29275102.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of high-concentration influent suspended solids on aerobic granulation in pilot-scale sequencing batch reactors treating real domestic wastewater. AU - Cetin,Ender, AU - Karakas,Emre, AU - Dulekgurgen,Ebru, AU - Ovez,Suleyman, AU - Kolukirik,Mustafa, AU - Yilmaz,Gulsum, Y1 - 2017/12/13/ PY - 2017/06/17/received PY - 2017/12/08/revised PY - 2017/12/09/accepted PY - 2017/12/25/pubmed PY - 2018/11/6/medline PY - 2017/12/25/entrez KW - Aerobic granular sludge KW - Domestic wastewater KW - Granule structure KW - Influent suspended solids KW - Microbial community KW - Pilot-scale SP - 74 EP - 89 JF - Water research JO - Water Res. VL - 131 N2 - The aim of this study was to investigate the effect of high-influent-concentration suspended solids (SS) on the cultivation, structure and long-term stability of aerobic granular sludge (AGS). Cultivation and long-term stability of AGS were monitored in two pilot-scale sequencing batch reactors fed with raw (R1) and settled (R2) domestic wastewater, representing high and medium SS content, respectively. The real domestic wastewater had high chemical oxygen demand (COD) content (1100 ± 270 mg COD L-1). Aerobic granular sludge was cultivated in 44 days (R1) and 25 days (R2) under the conditions of high settling velocity (18 m h-1) and high organic loading rate (OLR) (2.1-2.4 kg COD m3 day). The AGS in both reactors had similar structural properties during long-term operation and remained structurally and functionally stable during the last five months of operation. Comparative evaluation of the results indicated that the high influent SS content of the real domestic wastewater had a positive influence on maintaining significantly lower SVI30 and relatively lower effluent SS concentration. Moreover, a higher influent SS content resulted in smaller mature granules during the stable period. Microbial community analyses helped to understand the aerobic granular sludge structure and showed that the sludge retention time and OLR affected the granular sludge population. The high influent SS increased biomass detachment from the granular sludge surface and caused wash-out of some bacteria colonizing the exterior of the granular sludge. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/29275102/Effects_of_high_concentration_influent_suspended_solids_on_aerobic_granulation_in_pilot_scale_sequencing_batch_reactors_treating_real_domestic_wastewater_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(17)31009-6 DB - PRIME DP - Unbound Medicine ER -