Formation and properties of pure-oxygen aerobic granular sludge (POAGS) at high organic loading rates (HOLR)

2020 ◽  
Vol 179 ◽  
pp. 45-53
Author(s):  
Fanghui Pan ◽  
Youbao Wang ◽  
Yongbin Jiang ◽  
Xinxi Zhang ◽  
Kunxiao Huang ◽  
...  
Keyword(s):  
Granular Sludge ◽  
Pure Oxygen ◽  
Aerobic Granular Sludge ◽  
Organic Loading ◽  
Loading Rates

scholarly journals Aerobic granular sludge treating anaerobically pretreated brewery wastewater at different loading rates

2020 ◽  
Vol 82 (8) ◽  
pp. 1523-1534
Author(s):  
Alessandro di Biase ◽  
Fabio Santo Corsino ◽  
Tanner Ryan Devlin ◽  
Michele Torregrossa ◽  
Giulio Munz ◽  
...  
Keyword(s):  
Removal Rate ◽  
Granular Sludge ◽  
Granular Structure ◽  
Aerobic Granular Sludge ◽  
Organic Loading ◽  
Operational Parameters ◽  
Brewery Wastewater ◽  
Loading Rates ◽  
Performance Results

Abstract In this study, three different aerobic granular sludge (AGS) reactors fed with anaerobically pre-treated brewery wastewater were studied. The AGS reactors were operated under different conditions including organic loading rates (OLR) between 0.8 and 4.1 kg COD m−3 d−1, C:N:P ratios (100:10:1 and 100:6:1) and food to microorganism ratios (F/M) between 0.8 ± 0.6 and 1.2 ± 0.5 and 0.9 ± 0.3 kg-TCOD kg-VSS−1d−1. Stable granulation was achieved within two weeks and the size of the granules increased according to the OLR applied. The results indicated that low C:N:P and F/M ratios were favorable to achieve stable aerobic granules in the long term. The carbon removal rate was load-independent in the range examined (TCOD removal >80%), whereas TN removals were inversely proportional to the OLRs. Overall, a longer aeration reaction time with a lower OLR was beneficial to granular structure, which exhibited a compact and defined architecture. Performance results within the other conditions studied further indicated that the microbial community and its complex functionality in nutrient removal was efficient at operational parameters of OLR at 0.8 ± 0.2 kg-TCOD m−3d−1 and F/M ratio at 0.5 ± 0.2 kg-TCOD VSS−1d−1. Moreover, the protein to polysaccharide ratio increased as OLR decreased, leading to a stable granular structure.

Characterization of aerobic granular sludge at various organic loading rates

2009 ◽  
Vol 44 (2) ◽  
pp. 242-245 ◽  
Author(s):  
Bui Xuan Thanh ◽  
Chettiyappan Visvanathan ◽  
Roger Ben Aim
Keyword(s):  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Organic Loading ◽  
Loading Rates

Aerobic granular sludge reactor treating anaerobically pretreated brewery wastewater at different loading rates

2018 ◽  
Vol 2018 (13) ◽  
pp. 2295-2298
Author(s):  
A. di Biase ◽  
S.F Corsino ◽  
T.R Devlin ◽  
M Torregrossa ◽  
G Munz ◽  
...  
Keyword(s):  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Brewery Wastewater ◽  
Loading Rates

Aerobic granular sludge in an SBR-system treating wastewater rich in particulate matter

2004 ◽  
Vol 49 (11-12) ◽  
pp. 41-46 ◽  
Author(s):  
N. Schwarzenbeck ◽  
R. Erley ◽  
P.A. Wilderer
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Primary Particle ◽  
Loading Rate ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Particle Uptake ◽  
Tracer Experiments

Aerobic granular sludge was successfully cultivated in a lab-scale SBR-system treating malting wastewater with a high content of particulate organic matter (0.9 gTSS/L). At an organic loading rate (CODtotal) of 3.4 kg/(m3·d) an average removal efficiency of 50% in CODtotal and 80% in CODdissolved was achieved. Fractionation of the COD by means of particle size showed that particles with a diameter less than 25–50 μm could be removed at 80% efficiency, whereas particles bigger than 50 μm were only removed at 40% efficiency. Tracer experiments revealed a dense sessile protozoa population covering the granules. The protozoa appeared to be responsible for primary particle uptake from the wastewater.

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