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CLC number: X52

On-line Access: 2012-02-27

Received: 2011-06-01

Revision Accepted: 2011-11-08

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Journal of Zhejiang University SCIENCE A 2012 Vol.13 No.3 P.219-229

http://doi.org/10.1631/jzus.A1100153


Microbial and hydrodynamic properties of aerobic granules in a sequencing batch reactor treating landfill leachate


Author(s):  Yan-jie Wei, Min Ji, Guo-yi Li, Fei-fei Qin

Affiliation(s):  Key Laboratory of Environmental Protection in Water Transport Engineering Ministry of Communications, Tianjin Research Institute of Water Transport Engineering, Tianjin 300456, China; more

Corresponding email(s):   wei_yj@yahoo.cn, jmtju@yahoo.cn

Key Words:  Aerobic granules, Microbial community, Polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE), Landfill leachate


Yan-jie Wei, Min Ji, Guo-yi Li, Fei-fei Qin. Microbial and hydrodynamic properties of aerobic granules in a sequencing batch reactor treating landfill leachate[J]. Journal of Zhejiang University Science A, 2012, 13(3): 219-229.

@article{title="Microbial and hydrodynamic properties of aerobic granules in a sequencing batch reactor treating landfill leachate",
author="Yan-jie Wei, Min Ji, Guo-yi Li, Fei-fei Qin",
journal="Journal of Zhejiang University Science A",
volume="13",
number="3",
pages="219-229",
year="2012",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1100153"
}

%0 Journal Article
%T Microbial and hydrodynamic properties of aerobic granules in a sequencing batch reactor treating landfill leachate
%A Yan-jie Wei
%A Min Ji
%A Guo-yi Li
%A Fei-fei Qin
%J Journal of Zhejiang University SCIENCE A
%V 13
%N 3
%P 219-229
%@ 1673-565X
%D 2012
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1100153

TY - JOUR
T1 - Microbial and hydrodynamic properties of aerobic granules in a sequencing batch reactor treating landfill leachate
A1 - Yan-jie Wei
A1 - Min Ji
A1 - Guo-yi Li
A1 - Fei-fei Qin
J0 - Journal of Zhejiang University Science A
VL - 13
IS - 3
SP - 219
EP - 229
%@ 1673-565X
Y1 - 2012
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1100153


Abstract: 
A sequencing batch reactor (SBR) seeded with activated sludge was established for landfill leachate treatment. Small bio-aggregates began to appear after 40-d operation, and gradually changed to mature aerobic granules, with a mean size of 0.36–0.60 mm. Their sludge volume index at 5 min (SVI5 min), mixed liquor volatile suspended solids (MLVSS), and wet density were around 35 ml/g, 3.4 g/L, and 1.062 g/cm3, respectively. The settling velocities of the granules in distilled water ranged from 0.3 to 1.3 cm/s, which were faster than those in landfill leachate with a salt content of 1.4% (w/v), and also slightly faster than those predicted by Stokes’ law for porous but impermeable particles. microbial community evolution during the granulation process and stages under different nitrogen loading rates (NLRs) were monitored and analyzed by polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE), cloning, and sequencing of 16S ribosomal RNA (rRNA) fragments. Results revealed that some primary and dominant communities in inoculating activated sludge died out gradually; while a few common bacteria, inhabiting soils, municipal wastewater, or activated sludge systems, dominated in the SBR system throughout. In addition, some other dominant species, associated with the aerobic granulation process, were thought to play a significant role in the formation and growth of aerobic granular sludge. During the stable operation time under low NLR, a few species were present in abundance, and may have been responsible for the high organic removal efficiency at this time.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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