scholarly journals Upgrading municipal lagoons in temperate and cold climates: Total nitrogen removal and phosphorus assimilation at ultra‐low temperatures

2021 ◽  
Author(s):  
Patrick M. D’Aoust ◽  
Simon Vincent ◽  
Guillaume LeBlond ◽  
Raheleh Arabgol ◽  
Richard Hérard ◽  
...  
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Low Temperatures ◽  
Cold Climates ◽  
Total Nitrogen Removal

scholarly journals Upgrading northern municipal lagoons: Total nitrogen removal and phosphorus assimilation at ultra-low temperatures

2021 ◽  
Author(s):  
Patrick M. D'Aoust ◽  
Simon Vincent ◽  
Guillaume Leblond ◽  
Raheleh Arabgol ◽  
Richard Hérard ◽  
...  
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Low Temperatures ◽  
Pilot Scale ◽  
Ammonia Nitrogen ◽  
Biofilm Reactor ◽  
Sulfide Toxicity ◽  
Total Ammonia ◽  
Treatment Train ◽  
Total Nitrogen Removal

In this study, a municipal lagoon with high wintertime effluent total ammonia nitrogen (TAN) concentrations was upgraded with a pilot-scale NIT-NIT-DENIT moving bed biofilm reactor (MBBR) treatment train to characterize its effluent over wintertime operation, investigate the feasibility of upgrading lagoons to achieve substantial biological total nitrogen removal across ultra-low temperatures (0.6 – 3.0°C) and investigate nitrification inhibition pathways in facultative lagoon systems at ultra-low temperatures. Throughout the study, it was observed that the system substantially reduced total nitrogen (TN) and total phosphorus (TP) effluent concentrations by an average of 69.0 ± 24.5% and 74.7 ± 20.1%, respectively, with average TN and TP concentrations exiting the treatment train of 7.60 ± 5.60 mg-N/L and 0.05 ± 0.02 mg-P/L, respectively, indicating the feasibility of upgrading municipal lagoons to meet increasing stringent effluent standards to ensure the perenniality of water resources. Furthermore, it was observed that sulfide toxicity may play an important role in the inhibition of nitrifying organisms in lagoons.

Upstream Biological Treatment for Total Nitrogen Removal in a Direct Potable Reuse Application

2016 ◽  
Vol 2016 (12) ◽  
pp. 3961-3976
Author(s):  
Daniel Olson ◽  
Ifetayo Venner ◽  
David Ornelas
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Biological Treatment ◽  
Potable Reuse ◽  
Total Nitrogen Removal ◽  
Direct Potable Reuse

Effects of tetracycline on simultaneous biological wastewater nitrogen and phosphorus removal

RSC Advances ◽  
2015 ◽  
Vol 5 (73) ◽  
pp. 59326-59334 ◽  
Author(s):  
A. Chen ◽  
Y. Chen ◽  
C. Ding ◽  
H. Liang ◽  
B. Yang
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Phosphorus Removal ◽  
Protective Role ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Total Nitrogen Removal

The presence of 2 and 5 mg L−1of tetracycline decreased total nitrogen removal. Tetracycline induced EPS release and decreased its protective role on cells. Denitrifiers instead of nitrifiers were negatively affected by tetracycline.

Intermittent feeding of wastewater in combination with alternating aeration for complete denitrification and control of filaments

2010 ◽  
Vol 61 (9) ◽  
pp. 2259-2266 ◽  
Author(s):  
Styliani Kantartzi ◽  
Paraschos Melidis ◽  
Alexander Aivasidis
Keyword(s):  
Wastewater Treatment ◽  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Settling Tank ◽  
Treatment Plant ◽  
Operating Conditions ◽  
Anoxic Conditions ◽  
Total Nitrogen Removal

In the present study, a laboratory scale system, consisting of a primary settling tank, a continuous stirred tank reactor and a clarifier were constructed and operated, using wastewater from the municipal wastewater treatment plant in Xanthi, Greece. The system operated under intermittent aeration in aerobic/anoxic conditions and feeding of the wastewater once in every cycle. The unit was inoculated with sludge, which originated from the recirculation stream of the local wastewater treatment plant. The wastewater was processed with hydraulic retention time (HRT) of 12 h, in which various experimental states were studied regarding the combination of aerobic and anoxic intervals. The wastewater was fed in limited time once in every cycle of aerobic/anoxic conditions at the beginning of the anoxic period. The two states that exhibited highest performance in nitrification and total nitrogen removal were, then, repeated with HRT of 10 h. The results show that, regarding the nitrification stage and the organic load removal, the intermittent system achieved optimum efficiency, with an overall removal of biological oxygen demand (BOD5) and ammonium nitrogen in the range of 93–96% and 91–95% respectively. As far as the total nitrogen removal is concerned, and if the stage of the denitrification is taken into account, the performance of the intermittent system surpassed other methods, as it is shown by the total Kjeldahl nitrogen (TKN) removal efficiency of 85–87%. These operating conditions suppressed the growth of filamentous organisms, a fact reflected at the SVI values, which were lower than 150 ml/g.

Total nitrogen removal from high-strength ammonia recycle stream using a single submerged attached growth bioreactor

2007 ◽  
Vol 55 (8-9) ◽  
pp. 59-65 ◽  
Author(s):  
A. Onnis-Hayden ◽  
P.B. Pedros ◽  
J. Reade
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Treatment Plant ◽  
High Strength ◽  
Nitrogen Loading ◽  
Digested Sludge ◽  
Attached Growth ◽  
Anaerobically Digested Sludge ◽  
Total Nitrogen Removal

An experimental study investigating the nitrogen removal efficiency from the recycle stream generated in the dewatering facility of the anaerobically digested sludge at the Deer Island wastewater treatment plant (WWTP) in Boston was conducted using a single submerged attached growth bioreactor (SAGB), designed for simultaneous nitrification and denitrification. The applied nitrogen loading to the reactor ranged from 0.7 to 2.27 kg-N/m3·d, and the corresponding total nitrogen (TN) removal rate ranged from 0.38 to 1.8 kg-N/m3·d. The observed nitrification rates varied from 0.42 kg-N/m3·d to 1.45 kg-N/m3·d with an ammonia load of 0.5 kg-N/m3·d and 1.8 kg-N/m3·d, respectively. An average nitrification efficiency of 91% was achieved throughout the experiment. Denitrification efficiency varied from 55%, obtained without any addition of carbon source, to 95% when methanol was added in order to obtain a methanol/nitrate ratio of about 3 kg methanol/kg NO3−-N.

Novel 3D Pd-Cu(OH)2/CF cathode for rapid reduction of nitrate-N and simultaneous total nitrogen removal from wastewater

2021 ◽  
Vol 401 ◽  
pp. 123232
Author(s):  
Changhui Zhou ◽  
Jing Bai ◽  
Yan Zhang ◽  
Jinhua Li ◽  
Zhijing Li ◽  
...  
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Rapid Reduction ◽  
Nitrate N ◽  
Total Nitrogen Removal

Optimization of a full-scale site to achieve total nitrogen removal through implementation of a denitrification-submerged anoxic filter

2017 ◽  
Vol 32 (2) ◽  
pp. 242-249 ◽  
Author(s):  
I. Manzano ◽  
J. S. Dias ◽  
J. Cannon ◽  
A. Soares
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Full Scale ◽  
Total Nitrogen Removal
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