Granulation of activated sludge in a pilot-scale sequencing batch reactor for the treatment of low-strength municipal wastewater

Ni, Bing-Jie, Xie, Wen-Ming, Liu, Shao-Gen, Yu, Han-Qing, Wang, Ying-Zhe, Wang, Gan and Dai, Xian-Liang (2009) Granulation of activated sludge in a pilot-scale sequencing batch reactor for the treatment of low-strength municipal wastewater. Water Research, 43 3: 751-761. doi:10.1016/j.watres.2008.11.009


Author Ni, Bing-Jie
Xie, Wen-Ming
Liu, Shao-Gen
Yu, Han-Qing
Wang, Ying-Zhe
Wang, Gan
Dai, Xian-Liang
Title Granulation of activated sludge in a pilot-scale sequencing batch reactor for the treatment of low-strength municipal wastewater
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
1879-2448
Publication date 2009-02-01
Sub-type Article (original research)
DOI 10.1016/j.watres.2008.11.009
Volume 43
Issue 3
Start page 751
End page 761
Total pages 11
Place of publication London United Kingdom
Publisher I W A Publishing
Language eng
Formatted abstract
Aerobic granulation of activated sludge was achieved in a pilot-scale sequencing batch reactor (SBR) for the treatment of low-strength municipal wastewater (<200 mg L-1 of COD, chemical oxygen demand). The volume exchange ratio and settling time of an SBR were found to be two key factors in the granulation of activated sludge grown on the low-strength municipal wastewater. After operation of 300 days, the mixed liquor suspended solids (MLSS) concentration in the SBR reached 9.5 g L-1 and consisted of approximate 85% granular sludge. The average total COD removal efficiency kept at 90% and NH4+-N was almost completely depleted (∼95%) after the formation of aerobic granules. The granules (with a diameter over 0.212 mm) had a diameter ranging from 0.2 to 0.8 mm and had good settling ability with a settling velocity of 18-40 m h-1. Three bacterial morphologies of rod, coccus and filament coexisted in the granules. Mathematical modeling was performed to get insight into this pilot-scale granule-based reactor. The modified IWA activated sludge model No 3 (ASM3) was able to adequately describe the pilot-scale SBR dynamics during its cyclic operation.
Keyword Aerobic granulation
Low-strength
Mathematical modeling
Municipal wastewater
Pilot-scale
Sequencing batch reactor (SBR)
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Advanced Water Management Centre Publications
 
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