Variable aeration in sequencing batch reactor with aerobic granular sludge

Journal of Biotechnology
Yong-Qiang Liu, Joo-Hwa Tay

Abstract

This study investigated the effects of reduced aeration in famine period on the performance of sequencing batch reactor (SBR) with aerobic granular sludge. Aerobic granules were first cultivated in two SBRs (R1 and R2) with acetate as sole carbon source. From operation day 27, aeration rate in R1 was reduced from 1.66 to 0.55 cm s(-1) from 110 min to the end of each cycle and further reduced from 30 min to the end of each cycle from day 63. R2 as a control was operated with a constant aeration rate of 1.66 cm s(-1) in the whole cycle during the entire experimental period. Results showed that changing trends of SVI, concentration, average size and VSS/SS of biomass with time in R1 and R2 were similar although different aeration modes were adopted. At steady state, SVI of aerobic granules and biomass concentration maintained at about 40 ml g(-1) and 6 g l(-1), respectively. Average size of granules was about 750 microm in R1 while 550 microm in R2. This is the first study to demonstrate that aerobic granular sludge could be stable at reduced aeration rate in famine period during more than 3-month operation. Such an operation strategy with reduced aeration rate will lead to a significant reduction of energy consumption, which make...Continue Reading

References

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Apr 28, 2004·Biotechnology and Bioengineering·Britt-Marie WilénJürg Keller
Jun 16, 2004·Applied Microbiology and Biotechnology·Yong-Qiang LiuJoo-Hwa Tay
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Citations

Apr 26, 2007·Applied Microbiology and Biotechnology·Yong-Qiang LiuJian-Long Wang
Nov 7, 2013·Environmental Technology·A Val del RíoR Méndez
Sep 11, 2007·Bioresource Technology·Yong-Qiang LiuJian-Long Wang
Jan 13, 2015·Applied Microbiology and Biotechnology·Fang-Yuan ChenPing Ning
Feb 11, 2015·Bioresource Technology·Farrah Aini DahalanZaini Ujang
May 1, 2018·Applied Microbiology and Biotechnology·Britt-Marie WilénMalte Hermansson
Jan 4, 2008·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Zhiying HanYingxu Chen
Dec 7, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Yoshiaki HasebeSatoshi Tsuneda
Aug 28, 2020·The Science of the Total Environment·Yewei SunZhi-Wu Wang
Apr 28, 2021·Environmental Technology·Vânia S BessaPaula M L Castro

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