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Influence of operation mode and wastewater strength on aerobic granulation at pilot scale: Startup period, granular sludge characteristics, and effluent quality.
Water Res. 2019 Sep 01; 160:81-96.WR

Abstract

This study attempted to investigate the influence of operation mode and wastewater strength on startup period, aerobic granular sludge (AGS) characteristics, and system effluent quality at pilot scale. Granulation was monitored in three pilot-scale granular sequencing batch reactors (GSBRs). Comparative evaluation of AN/O/AX/O_SBR and O_SBR, fed with wastewater of the same composition but run with completely different SBR reaction phase arrangements (alternating vs. purely aerobic), revealed the effect of SBR operation mode. Comparative study of the GSBRs operated with alternating SBR reaction phases (AN/O/AX/O_SBR and AN/O_SBR) and fed with wastewater of different strength (high- vs. medium-strength) determined the effect of wastewater composition. Granulation time and granule size were regulated by wastewater strength and the resulting organic and sludge loading conditions. Whereas, AGS morphology, granule structure, and floccular proportion of AGS were attributed to SBR operation mode. Effluent clarity in terms of suspended solid concentration depended on wastewater strength. Subtle but distinct microbial selection strategies were in effect during granulation which were also imposed by wastewater strength. Due to strong correlation between the effluent and AGS microbial structures, demonstrated by biodiversity analysis, differences in the microbial composition of effluent biomass and washout patterns of the GSBRs could be explained by wastewater strength as well. Limited nutrient removal efficiencies, restricted by organic matter concentration, could be due to involvement of unorthodox nutrient removal pathways which warrants further investigation.

Authors+Show Affiliations

Department of Civil Engineering, University of Calgary, Calgary, Canada. Electronic address: roya.pishgar@ucalgary.ca.Department of Civil Engineering, University of Calgary, Calgary, Canada.Department of Civil Engineering, University of Calgary, Calgary, Canada.Department of Civil Engineering, University of Calgary, Calgary, Canada.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31132565

Citation

Pishgar, Roya, et al. "Influence of Operation Mode and Wastewater Strength On Aerobic Granulation at Pilot Scale: Startup Period, Granular Sludge Characteristics, and Effluent Quality." Water Research, vol. 160, 2019, pp. 81-96.
Pishgar R, Dominic JA, Sheng Z, et al. Influence of operation mode and wastewater strength on aerobic granulation at pilot scale: Startup period, granular sludge characteristics, and effluent quality. Water Res. 2019;160:81-96.
Pishgar, R., Dominic, J. A., Sheng, Z., & Tay, J. H. (2019). Influence of operation mode and wastewater strength on aerobic granulation at pilot scale: Startup period, granular sludge characteristics, and effluent quality. Water Research, 160, 81-96. https://doi.org/10.1016/j.watres.2019.05.026
Pishgar R, et al. Influence of Operation Mode and Wastewater Strength On Aerobic Granulation at Pilot Scale: Startup Period, Granular Sludge Characteristics, and Effluent Quality. Water Res. 2019 Sep 1;160:81-96. PubMed PMID: 31132565.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of operation mode and wastewater strength on aerobic granulation at pilot scale: Startup period, granular sludge characteristics, and effluent quality. AU - Pishgar,Roya, AU - Dominic,John Albino, AU - Sheng,Zhiya, AU - Tay,Joo Hwa, Y1 - 2019/05/13/ PY - 2018/12/13/received PY - 2019/04/07/revised PY - 2019/05/08/accepted PY - 2019/5/28/pubmed PY - 2019/11/7/medline PY - 2019/5/28/entrez KW - Aerobic granular sludge (AGS) characteristics KW - Effluent quality KW - Pilot scale KW - Sequencing batch reactor (SBR) operation mode KW - Startup KW - Wastewater strength SP - 81 EP - 96 JF - Water research JO - Water Res. VL - 160 N2 - This study attempted to investigate the influence of operation mode and wastewater strength on startup period, aerobic granular sludge (AGS) characteristics, and system effluent quality at pilot scale. Granulation was monitored in three pilot-scale granular sequencing batch reactors (GSBRs). Comparative evaluation of AN/O/AX/O_SBR and O_SBR, fed with wastewater of the same composition but run with completely different SBR reaction phase arrangements (alternating vs. purely aerobic), revealed the effect of SBR operation mode. Comparative study of the GSBRs operated with alternating SBR reaction phases (AN/O/AX/O_SBR and AN/O_SBR) and fed with wastewater of different strength (high- vs. medium-strength) determined the effect of wastewater composition. Granulation time and granule size were regulated by wastewater strength and the resulting organic and sludge loading conditions. Whereas, AGS morphology, granule structure, and floccular proportion of AGS were attributed to SBR operation mode. Effluent clarity in terms of suspended solid concentration depended on wastewater strength. Subtle but distinct microbial selection strategies were in effect during granulation which were also imposed by wastewater strength. Due to strong correlation between the effluent and AGS microbial structures, demonstrated by biodiversity analysis, differences in the microbial composition of effluent biomass and washout patterns of the GSBRs could be explained by wastewater strength as well. Limited nutrient removal efficiencies, restricted by organic matter concentration, could be due to involvement of unorthodox nutrient removal pathways which warrants further investigation. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/31132565/Influence_of_operation_mode_and_wastewater_strength_on_aerobic_granulation_at_pilot_scale:_Startup_period_granular_sludge_characteristics_and_effluent_quality_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(19)30412-9 DB - PRIME DP - Unbound Medicine ER -
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