Denitrification using excess activated sludge as carbon source: Performance and the microbial community dynamics

2017 ◽  
Vol 238 ◽  
pp. 624-632 ◽  
Author(s):  
Haohao Sun ◽  
Qiang Wu ◽  
Ping Yu ◽  
Liangying Zhang ◽  
Lin Ye ◽  
...  
Keyword(s):  
Microbial Community ◽  
Carbon Source ◽  
Activated Sludge ◽  
Community Dynamics ◽  
Microbial Community Dynamics

Microbial Community Dynamics and Nutrient Removal Performances in A2O System Using Ultrasonic-Disintegrated Sludge Supernatant as Internal Carbon Source

2013 ◽  
Vol 777 ◽  
pp. 196-200
Author(s):  
Ya Li Liu ◽  
Yi Xing Yuan ◽  
Mao An Du
Keyword(s):  
Microbial Community ◽  
Carbon Source ◽  
Nutrient Removal ◽  
Community Dynamics ◽  
Ammonia Nitrogen ◽  
Biological Nutrient Removal ◽  
Ammonia Oxidizing Bacteria ◽  
Microbial Community Dynamics ◽  
Removal Efficiencies ◽  
Community Changes

Ultrasonic-disintegrated sludge supernatant was supplemented into A2O system to assess the effects on nutrient removal performances and microbial community changes. In this experiment, easily biodegradable organics accounted for 50.6% of sludge supernatant, indicating its potential for biological nutrient removal. Simultaneously, during two-month operational period, the ammonia nitrogen (NH4+-N) and total phosphorus (TP) removal efficiencies improved to 92.3% and 93.5% from75.6% and 53.4%. Duo to the application of sludge supernatant, two microbial phyla, Proteobacteria and Actinobacteria, were primarily responsible for the biological nutrient removal. In particular, the sludge supernatant was selective for ammonia oxidizing bacteria Comamonas sp. and denitrifying phosphate accumulating organisms Sphingobacterium.

Emerging investigator series: activated sludge upon antibiotic shock loading: mechanistic description of functional stability and microbial community dynamics

2020 ◽  
Vol 6 (5) ◽  
pp. 1262-1271
Author(s):  
Seungdae Oh ◽  
Donggeon Choi
Keyword(s):  
Microbial Community ◽  
Activated Sludge ◽  
System Performance ◽  
Shock Loading ◽  
Community Dynamics ◽  
Practical Importance ◽  
Environmental Stressors ◽  
Biological Processes ◽  
Functional Stability ◽  
Microbial Community Dynamics

Elucidating the functional stability upon environmental stressors is of great practical importance for managing the system performance of various environmental biological processes (e.g., activated sludge).

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