Bacterial Community Shift during the Startup of a Full-Scale Oxidation Ditch Treating Sewage

2017 ◽  
Vol 27 (1) ◽  
pp. 141-148 ◽  
Author(s):  
Yajun Chen ◽  
Lin Ye ◽  
Fuzheng Zhao ◽  
Lin Xiao ◽  
Shupei Cheng ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Full Scale ◽  
Oxidation Ditch ◽  
Community Shift

Illumina sequencing reveals bacterial community shift and its role in a full-scale A2O sewage treatment process at low temperatures

2018 ◽  
Vol 109 ◽  
pp. 193-204 ◽  
Author(s):  
Xiao-Hu Kang ◽  
Xiu-Kun Wu ◽  
Hui Wang ◽  
Xiao-Ying Zeng ◽  
Yan Leng ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Illumina Sequencing ◽  
Low Temperatures ◽  
Treatment Process ◽  
Sewage Treatment ◽  
Full Scale ◽  
Community Shift

scholarly journals Study on Sludge and Dissolved Oxygen Distribution in a Full-Scale A2/O Oxidation Ditch

Water ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 2776
Author(s):  
Chengyi Li ◽  
Zhao Han ◽  
Yuquan Zhang ◽  
Yuan Zheng ◽  
Hepeng Zhang ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Flow Model ◽  
Rotation Speed ◽  
Full Scale ◽  
Oxidation Ditch ◽  
Bed Height ◽  
Consumption Rates ◽  
The Relationship ◽  
Oxygenation Rate ◽  
Biological Selection

The distribution of velocity, sludge, and dissolved oxygen in a full-scale anaerobic-anoxic-oxic (A2/O) oxidation ditch was numerically simulated under three rotation speed scenarios. The viscosity and settling rate of activated sludge were defined through a user-defined function (UDF), and the sludge phase was calculated using the mixture multiphase flow model. Dissolved oxygen (DO) was set as a user-defined source (UDS) and its generation and consumption rates were defined with UDFs. The relationship between velocity and sludge concentration was found to be contradictory, with dead zones leading to large sludge concentrations at the bottom of the oxidation ditch (OD), but not at the middle-curved wall of the anoxic pool. The flow rate of the reflux slot and aerator oxygenation rate were checked and correlated with DO concentrations in the anaerobic pool. The majority of the large sludge concentrations were concentrated in the biological selection pool and these remained constant with bed height. With reduced propeller and agitator rotation speed, the sludge concentrations reduced in the biological selection pool, but increased in the anaerobic and anoxic pools.

scholarly journals Bacterial community structures are unique and resilient in full-scale bioenergy systems

2011 ◽  
Vol 108 (10) ◽  
pp. 4158-4163 ◽  
Author(s):  
J. J. Werner ◽  
D. Knights ◽  
M. L. Garcia ◽  
N. B. Scalfone ◽  
S. Smith ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Full Scale ◽  
Community Structures ◽  
Bioenergy Systems
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