Microbial Population Dynamics and Ecosystem Functions of Anoxic/Aerobic Granular Sludge in Sequencing Batch Reactors Operated at Different Organic Loading Rates

Frontiers in Microbiology
Enikö SzabóBritt-Marie Wilén

Abstract

The granular sludge process is an effective, low-footprint alternative to conventional activated sludge wastewater treatment. The architecture of the microbial granules allows the co-existence of different functional groups, e.g., nitrifying and denitrifying communities, which permits compact reactor design. However, little is known about the factors influencing community assembly in granular sludge, such as the effects of reactor operation strategies and influent wastewater composition. Here, we analyze the development of the microbiomes in parallel laboratory-scale anoxic/aerobic granular sludge reactors operated at low (0.9 kg m(-3)d(-1)), moderate (1.9 kg m(-3)d(-1)) and high (3.7 kg m(-3)d(-1)) organic loading rates (OLRs) and the same ammonium loading rate (0.2 kg NH4-N m(-3)d(-1)) for 84 days. Complete removal of organic carbon and ammonium was achieved in all three reactors after start-up, while the nitrogen removal (denitrification) efficiency increased with the OLR: 0% at low, 38% at moderate, and 66% at high loading rate. The bacterial communities at different loading rates diverged rapidly after start-up and showed less than 50% similarity after 6 days, and below 40% similarity after 84 days. The three reactor micro...Continue Reading

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Citations

May 1, 2018·Applied Microbiology and Biotechnology·Britt-Marie WilénMalte Hermansson
Feb 6, 2018·Critical Reviews in Biotechnology·Raquel LiébanaBritt-Marie Wilén
Aug 20, 2019·Applied Microbiology and Biotechnology·Annerys Carabeo-PérezJanet Jiménez-Hernández
Jan 19, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Zerihun A BekeleNancy G Love
Nov 18, 2018·FEMS Microbiology Letters·Yuxiu ZhangTuanyao Chai
Mar 20, 2018·Applied Microbiology and Biotechnology·Juntao XiaXu-Xiang Zhang
Nov 21, 2020·The Science of the Total Environment·Yuya TakimotoTakashi Yamaguchi
Dec 22, 2020·Frontiers in Microbiology·Yu-Ming Cai
Mar 14, 2021·Water Research·Mary Luz Barrios-HernándezChristine M Hooijmans
Mar 31, 2021·Environmental Science and Pollution Research International·Barbara Muñoz-PalazonAlejandro Gonzalez-Martinez
Dec 26, 2019·Journal of Hazardous Materials·Alfonz KedvesZoltán Kónya
Jun 12, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Yajing LiLiyuan Jia
May 27, 2021·Water Environment Research : a Research Publication of the Water Environment Federation·Yuan TianGuanghui Chen
Jul 21, 2021·Journal of Hazardous Materials·Luc MalhautierJean-Louis Fanlo
Apr 11, 2019·Environmental Science & Technology·Raquel LiébanaBritt-Marie Wilén
Oct 11, 2021·The Science of the Total Environment·Ziwei ChenXiaoliu Huangfu

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Methods Mentioned

BETA
amplicon sequencing
PCR
Laser Scanning Microscopy

Software Mentioned

Excel
Zeiss ZEN2010
NMDS
ggplot2
R
ampvis

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