Synergy between autotrophic denitrification and Anammox driven by FeS in a fluidized bed bioreactor for advanced nitrogen removal

Chemosphere ◽  
2021 ◽  
pp. 130726
Author(s):  
Jingde Ma ◽  
Jingyue Wei ◽  
Qiaoping Kong ◽  
Zemin Li ◽  
Jianxin Pan ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Nitrogen Removal ◽  
Autotrophic Denitrification ◽  
Fluidized Bed Bioreactor ◽  
Advanced Nitrogen Removal

Nitrogen removal in a fluidized bed bioreactor by using mixed culture under oxygen-limited conditions

2004 ◽  
Vol 50 (6) ◽  
pp. 313-320 ◽  
Author(s):  
T. Khin ◽  
A.P. Annachhatre
Keyword(s):  
Fluidized Bed ◽  
Mixed Culture ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Flow Rates ◽  
Fluidized Bed Bioreactor ◽  
Oxygen Gas ◽  
Do Concentration ◽  
Total Nitrogen Removal ◽  
Nitrification And Denitrification

Nitrogen removal involving nitrification and denitrification was investigated in a fluidized bed bioreactor by using mixed culture sludge under oxygen-limited conditions. Methane was used as a sole carbon source for denitrification. In this study, optimal nitrification and denitrification rates were examined by varying methane and oxygen gas dissolution flow rates, 90 ml/min, 400 ml/min and 650 ml/min, in each. Simultaneously nitrification and denitrification was achieved. The total nitrogen removal rate was 15-mg N/g VSS. d, 21-mg N/g VSS. d and 26.4-mg N/g VSS. d at gas dissolution flow rate 90 ml/min, 400 ml/min and 650 ml/min, respectively. No significant accumulation of nitrite was found in this experiment. Nitrogen removal rates depend on gas dissolution flow rates. DO concentration was at 0.5Ð2 mg/L.

Study on De-Nitrification of Improved Step-Feed Progress

2014 ◽  
Vol 703 ◽  
pp. 171-174
Author(s):  
Bing Wang ◽  
Yi Xiao ◽  
Shou Hui Tong ◽  
Lan Fang ◽  
Da Hai You ◽  
...  
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Fluidized Bed ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Operating Conditions ◽  
Removal Mechanism ◽  
Aerobic Zone

Improved step-feed de-nitrification progress combined with biological fluidized bed was introduced in this study. The progress had good performance and capacity of de-nitrification and organic matter. The experiment result showed that the de-nitrification efficiency of the improved biological fluidized bed with step-feed process was higher than the fluidized bed A/O process under the same water quality and the operating conditions. When the influent proportion of each segment was equal, the system showed good nitrogen removal efficiency with the change of influent C/N ratio, HRT and sludge return ratio. The removal rate of TN reached up to 88.2%. It showed that the simultaneous nitrification and de-nitrification phenomenon happened in the aerobic zone. The nitrogen removal mechanism was also studied.

Global modeling and simulation of a three-phase fluidized bed bioreactor

2009 ◽  
Vol 33 (1) ◽  
pp. 359-370 ◽  
Author(s):  
Mauren Fuentes ◽  
Miguel C. Mussati ◽  
Nicolás J. Scenna ◽  
Pío A. Aguirre
Keyword(s):  
Modeling And Simulation ◽  
Fluidized Bed ◽  
Global Modeling ◽  
Fluidized Bed Bioreactor ◽  
Three Phase
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