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

Organic loading rate (OLR) regulation for enhancement of aerobic sludge granulation: Role of key microorganism and their function

2019 ◽  
Vol 653 ◽  
pp. 630-637 ◽  
Author(s):  
Zhiming Zhang ◽  
Jianxiang Qiu ◽  
Ronghao Xiang ◽  
Haitian Yu ◽  
Xiangyang Xu ◽  
...  
Keyword(s):  
Loading Rate ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Sludge Granulation ◽  
Aerobic Sludge

scholarly journals Aerobic Sludge Granulation in a Full-Scale Sequencing Batch Reactor

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Jun Li ◽  
Li-Bin Ding ◽  
Ang Cai ◽  
Guo-Xian Huang ◽  
Harald Horn
Keyword(s):  
Extracellular Polymeric Substances ◽  
Sequencing Batch Reactor ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Full Scale ◽  
Granule Formation ◽  
Sludge Granulation ◽  
Aerobic Sludge ◽  
Raw Wastewater

Aerobic granulation of activated sludge was successfully achieved in a full-scale sequencing batch reactor (SBR) with 50,000 m3 d−1for treating a town’s wastewater. After operation for 337 days, in this full-scale SBR, aerobic granules with an average SVI30of 47.1 mL g−1, diameter of 0.5 mm, and settling velocity of 42 m h−1were obtained. Compared to an anaerobic/oxic plug flow (A/O) reactor and an oxidation ditch (OD) being operated in this wastewater treatment plant, the sludge from full-scale SBR has more compact structure and excellent settling ability. Denaturing gradient gel electrophoresis (DGGE) analysis indicated thatFlavobacteriumsp., uncultured beta proteobacterium, unculturedAquabacteriumsp., and unculturedLeptothrixsp. were just dominant in SBR, whereas uncultured bacteroidetes were only found in A/O and OD. Three kinds of sludge had a high content of protein in extracellular polymeric substances (EPS). X-ray fluorescence (XRF) analysis revealed that metal ions and some inorganics from raw wastewater precipitated in sludge acted as core to enhance granulation. Raw wastewater characteristics had a positive effect on the granule formation, but the SBR mode operating with periodic feast-famine, shorter settling time, and no return sludge pump played a crucial role in aerobic sludge granulation.

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.

Effects of seed sludge properties and selective biomass discharge on aerobic sludge granulation

2010 ◽  
Vol 160 (1) ◽  
pp. 108-114 ◽  
Author(s):  
Guo-ping Sheng ◽  
An-jie Li ◽  
Xiao-yan Li ◽  
Han-qing Yu
Keyword(s):  
Seed Sludge ◽  
Sludge Properties ◽  
Sludge Granulation ◽  
Aerobic Sludge

Aerobic sludge granulation: state-of-the-art

2009 ◽  
Vol 1 (2) ◽  
pp. 136 ◽  
Author(s):  
Jose Luis Campos ◽  
Monica Figueroa ◽  
Anuska Mosquera Corral ◽  
Ramon Mendez
Keyword(s):  
State Of The Art ◽  
Sludge Granulation ◽  
Aerobic Sludge

scholarly journals Effect of seeding sludge type and hydrodynamic shear force on the aerobic sludge granulation in sequencing batch airlift reactors

2009 ◽  
Vol 4 (5) ◽  
pp. 826-831 ◽  
Author(s):  
K. Y. Koh ◽  
K. H. Kueh ◽  
K. T. Loh ◽  
H. J. Leong ◽  
A. S. M. Chua ◽  
...  
Keyword(s):  
Shear Force ◽  
Hydrodynamic Shear ◽  
Sludge Granulation ◽  
Aerobic Sludge ◽  
Airlift Reactors

AEROBIC SLUDGE GRANULATION FOR PARTIAL NITRIFICATION OF AMMONIA-RICH INORGANIC WASTEWATER

2013 ◽  
Vol 12 (7) ◽  
pp. 1375-1380 ◽  
Author(s):  
An-Jie Li ◽  
Xiao-Yan Li ◽  
Xiang-Chun Quan ◽  
Zhi-Feng Yang
Keyword(s):  
Partial Nitrification ◽  
Sludge Granulation ◽  
Aerobic Sludge
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