Promoting the granulation process of aerobic sludge via a sustainable strategy of effluent reflux in view of AHLs-mediated quorum sensing

2022 ◽  
Vol 303 ◽  
pp. 114091
Author(s):  
Yatong Ji ◽  
Haitian Yu ◽  
Runjuan Cao ◽  
Xiangyang Xu ◽  
Liang Zhu
Keyword(s):  
Quorum Sensing ◽  
Granulation Process ◽  
Aerobic Sludge

Modeling and verification of selective sludge discharge as the controlling factor for aerobic granulation

2010 ◽  
Vol 62 (10) ◽  
pp. 2442-2449
Author(s):  
A. J. Li ◽  
T. Zhang ◽  
X. Y. Li
Keyword(s):  
Laboratory Experiments ◽  
Growth Form ◽  
Experimental Studies ◽  
Controlling Factor ◽  
Substrate Uptake ◽  
Granulation Process ◽  
Sludge Flocs ◽  
Dense Granules ◽  
Biomass Dynamics ◽  
Aerobic Sludge

Mathematical simulation and laboratory experiments were conducted to investigate the controlling factor for aerobic sludge granulation. A model was used to describe the biomass dynamics during the granulation process. The simulation results indicate that the selective discharge of small and loose sludge flocs is the key controlling factor for granulation. In the experimental studies, tests were conducted with four batch column reactors (BCR) that were seeded with both activated sludge flocs and mature granules. Three different sludge discharge methods were tested, including unselective discharge of mixed sludge, selective discharge of small and slow-settling flocs, and selective discharge of settled dense sludge. The results show that mixed sludge discharge and discharge of dense sludge resulted in disappearance of granules from the reactors. Only selective discharge of small and slow-settling sludge flocs led to complete granulation. Small and loose sludge flocs were found to have a clear advantage over large and dense granules in substrate uptake. It can be concluded that selective discharge of loose flocs removes these competitors in suspended-growth mode from the reactors and makes the substrate more available for uptake and utilization by the biomass in attached-growth form, leading to granulation.

Understanding of aerobic sludge granulation enhanced by sludge retention time in the aspect of quorum sensing

2019 ◽  
Vol 272 ◽  
pp. 226-234 ◽  
Author(s):  
Zhiming Zhang ◽  
Zhuodong Yu ◽  
Zihao Wang ◽  
Ke Ma ◽  
Xiangyang Xu ◽  
...  
Keyword(s):  
Quorum Sensing ◽  
Retention Time ◽  
Sludge Retention Time ◽  
Sludge Granulation ◽  
Aerobic Sludge

Effects of Sulfamethoxazole on Aerobic Sludge Granulation Process

2021 ◽  
Author(s):  
Cui Di ◽  
Nianpeng Wei ◽  
Na Ling ◽  
Guochen Zheng ◽  
Yuan Sun ◽  
...  
Keyword(s):  
Granulation Process ◽  
Sludge Granulation ◽  
Aerobic Sludge
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