scholarly journals The influence of aeration control and temperature reduction on nitrogen removal and microbial community in two anammox‐based hybrid sequencing batch biofilm reactors

2021 ◽  
Author(s):  
Mohammad Azari ◽  
Aisha Jurnalis ◽  
Martin Denecke
Keyword(s):  
Microbial Community ◽  
Nitrogen Removal ◽  
Biofilm Reactors ◽  
Temperature Reduction ◽  
Sequencing Batch Biofilm Reactors ◽  
Aeration Control

Autotrophic nitrogen removal in sequencing batch biofilm reactors at different oxygen supply modes

2008 ◽  
Vol 58 (10) ◽  
pp. 1889-1894 ◽  
Author(s):  
C. Wantawin ◽  
J. Juateea ◽  
P. L. Noophan ◽  
J. Munakata-Marr
Keyword(s):  
Nitrogen Removal ◽  
Nitrogen Loss ◽  
Ammonia Concentration ◽  
Anammox Bacteria ◽  
Ammonia Oxidizing Bacteria ◽  
Intermittent Aeration ◽  
Biofilm Reactors ◽  
Air Supply ◽  
Nitrite Oxidizing Bacteria ◽  
Sequencing Batch Biofilm Reactors

Conventional nitrification-denitrification treatment is a common way to treat nitrogen in wastewater, but this process is costly for low COD/N wastewaters due to the addition of air and external carbon-source. However, ammonia may alternatively be converted to dinitrogen gas by autotrophic bacteria utilizing aerobically autotrophically produced nitrite as an electron acceptor under anoxic conditions. Lab-scale sequencing batch biofilm reactors (SBBRs) inoculated with normal nitrifying sludge were employed to study the potential of an oxygen-limited autotrophic nitrification-denitrification process initiated with typical nitrifying sludge for treating a synthetic ammonia wastewater devoid of organic carbon in one step. The ring-laced fibrous carrier (length 0.32 m, surface area 3.4 m2/m) was fixed vertically in a 3 L reactor. Two different air supply modes were applied:continuous aeration to control dissolved oxygen at 1.5 mg/L and intermittent aeration. High nitrogen removals of more than 50% were obtained in both SBBRs. At an ammonia loading of 0.882 gm N/m2-day [hydraulic retention time (HRT) of 24 hr], the SBBR continuously aerated to 1.5 mg DO/L had slightly higher nitrogen removal (64%) than the intermittently alternated SBBR (55%). The main form of residual nitrogen in the effluent was ammonia, at concentrations of 25 mg/L and 37 mg N/L in continuous and intermittent aeration SBBRs, respectively. Ammonia was completely consumed when ammonia loading was reduced to 0.441 gm N/m2-day [HRT extended to 48 hr]. The competitive use of nitrite by aerobic nitrite oxidizing bacteria (ANOB) with anaerobic ammonia-oxidizing bacteria (anammox bacteria) during the expanded aeration period under low remaining ammonia concentration resulted in higher nitrate production and lower nitrogen loss in the continuous aeration SBBR than in the intermittent aeration SBBR. The nitrogen removal efficiencies in SBBRs with continuous and alternating aerated were 80% and 86% respectively. Specific microorganisms in the biofilm were characterized using fluorescence in situ hybridization. Aerobic ammonia-oxidizing bacteria (AAOB) occurred side by side with putative anammox bacteria (cells hybridizing with probe AMX820) throughout the biofilm, though ANOB were rarely detected.

scholarly journals Sequentially aerated membrane biofilm reactors for autotrophic nitrogen removal: microbial community composition and dynamics

2013 ◽  
Vol 7 (1) ◽  
pp. 32-43 ◽  
Author(s):  
Carles Pellicer‐Nàcher ◽  
Stéphanie Franck ◽  
Arda Gülay ◽  
Maël Ruscalleda ◽  
Akihiko Terada ◽  
...  
Keyword(s):  
Microbial Community ◽  
Community Composition ◽  
Nitrogen Removal ◽  
Microbial Community Composition ◽  
Biofilm Reactors ◽  
Autotrophic Nitrogen Removal

Rare earth mine wastewater treatment via modified constructed rapid infiltration system: Nitrogen removal performance and microbial community

2021 ◽  
Vol 150 ◽  
pp. 223-232
Author(s):  
Jiacheng Sun ◽  
Chengyuan Su ◽  
Ying Xie ◽  
Zhi Huang ◽  
Jiayi Bao ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Rare Earth ◽  
Microbial Community ◽  
Nitrogen Removal ◽  
Mine Wastewater ◽  
Rare Earth Mine

Woodchips bioretention column for stormwater treatment: Nitrogen removal performance, carbon source and microbial community analysis

Chemosphere ◽  
2021 ◽  
pp. 131519
Author(s):  
Lingjie Liu ◽  
Fen Wang ◽  
Sihan Xu ◽  
Wei Sun ◽  
Yang Wang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Carbon Source ◽  
Nitrogen Removal ◽  
Community Analysis ◽  
Microbial Community Analysis ◽  
Stormwater Treatment

Two-stage partial nitrification-Anammox process for nitrogen removal from slaughterhouse wastewater: Evaluation of the nitrogen loading rate and microbial community analysis

2021 ◽  
Vol 296 ◽  
pp. 113214
Author(s):  
Natália Carolina Silveira ◽  
Guilherme Henrique Duarte Oliveira ◽  
Márcia Helena Rissato Zamariolli Damianovic ◽  
Eugenio Foresti
Keyword(s):  
Microbial Community ◽  
Nitrogen Removal ◽  
Loading Rate ◽  
Community Analysis ◽  
Nitrogen Loading ◽  
Microbial Community Analysis ◽  
Partial Nitrification ◽  
Two Stage ◽  
Slaughterhouse Wastewater ◽  
Anammox Process
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