Characteristics of aerobic granular sludge in a sequencing batch reactor with variable aeration
Characteristics of aerobic granular sludge in a sequencing batch reactor with variable aeration
Aerobic granules can be used for the treatment of industrial or municipal wastewater, but high aeration rate is required for the stable operation of the granular sludge system. Therefore, the aim of this research was to reduce aeration rate greatly to decrease the energy consumption for the technology of aerobic granules. Based on the characteristics of sequencing batch reactor with distinct feast and famine periods, aeration rate was reduced from 1.66 to 0.55 cm s?1 in the famine period after granules were formed. It was found that the settleability of aerobic granules in reactor R1 with reduced aeration was the same as that of aerobic granules in reactor R2 with constant aeration rate of 1.66 cm s?1. However, the outer morphology of aerobic granules gradually changed from round shape to long shape, and minor population showed certain shift after aeration rate was reduced in the famine period. Since good settleability is the most essential feature of aerobic granules, it can be said that reducing aeration rate in famine period did not influence the stable operation of aerobic granular sludge system. Furthermore, the experimental results indicated that aeration rate in feast period was much more important to the stable operation of aerobic granules than that in famine period.
761-766
Liu, Yong-Qiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Tay, Joo-Hwa
1bd3ce87-355e-460f-835b-56cb81f3a1b0
Moy, Benjamin Yan-Pui
b148c1e1-9db1-4580-83e8-6a17999dfd92
August 2006
Liu, Yong-Qiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Tay, Joo-Hwa
1bd3ce87-355e-460f-835b-56cb81f3a1b0
Moy, Benjamin Yan-Pui
b148c1e1-9db1-4580-83e8-6a17999dfd92
Liu, Yong-Qiang, Tay, Joo-Hwa and Moy, Benjamin Yan-Pui
(2006)
Characteristics of aerobic granular sludge in a sequencing batch reactor with variable aeration.
Applied Microbiology and Biotechnology, 71 (5), .
(doi:10.1007/s00253-005-0209-1).
Abstract
Aerobic granules can be used for the treatment of industrial or municipal wastewater, but high aeration rate is required for the stable operation of the granular sludge system. Therefore, the aim of this research was to reduce aeration rate greatly to decrease the energy consumption for the technology of aerobic granules. Based on the characteristics of sequencing batch reactor with distinct feast and famine periods, aeration rate was reduced from 1.66 to 0.55 cm s?1 in the famine period after granules were formed. It was found that the settleability of aerobic granules in reactor R1 with reduced aeration was the same as that of aerobic granules in reactor R2 with constant aeration rate of 1.66 cm s?1. However, the outer morphology of aerobic granules gradually changed from round shape to long shape, and minor population showed certain shift after aeration rate was reduced in the famine period. Since good settleability is the most essential feature of aerobic granules, it can be said that reducing aeration rate in famine period did not influence the stable operation of aerobic granular sludge system. Furthermore, the experimental results indicated that aeration rate in feast period was much more important to the stable operation of aerobic granules than that in famine period.
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Published date: August 2006
Organisations:
Water & Environmental Engineering Group
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Local EPrints ID: 352832
URI: http://eprints.soton.ac.uk/id/eprint/352832
ISSN: 0175-7598
PURE UUID: e9c9f667-64d0-4b1a-b33f-264b9df57436
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Date deposited: 17 Jun 2013 14:13
Last modified: 15 Mar 2024 03:47
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Author:
Joo-Hwa Tay
Author:
Benjamin Yan-Pui Moy
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