Nitrogen Removal Capacity of the River Network in a High Nitrogen Loading Region

2015 ◽  
Vol 49 (3) ◽  
pp. 1427-1435 ◽  
Author(s):  
Yongqiang Zhao ◽  
Yongqiu Xia ◽  
Chaopu Ti ◽  
Jun Shan ◽  
Bolun Li ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
River Network ◽  
Nitrogen Loading ◽  
High Nitrogen ◽  
Removal Capacity ◽  
High Nitrogen Loading

scholarly journals Performance of the anammox sequencing batch reactor treating synthetic and real landfill leachate

2018 ◽  
Vol 44 ◽  
pp. 00179 ◽  
Author(s):  
Mariusz Tomaszewski ◽  
Grzegorz Cema ◽  
Tomasz Twardowski ◽  
Aleksandra Ziembińska-Buczyńska
Keyword(s):  
Nitrogen Removal ◽  
Landfill Leachate ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Nitrogen Loading ◽  
Synthetic Wastewater ◽  
High Nitrogen ◽  
Removal Capacity ◽  
Anammox Activity ◽  
Anammox Process

The anaerobic ammonium oxidation (anammox) process is one of the most energy efficient and environmentally-friendly bioprocess for the treatment of the wastewater with high nitrogen concentration. The aim of this work was to study the influence of the high nitrogen loading rate (NLR) on the nitrogen removal in the laboratory-scale anammox sequencing batch reactor (SBR), during the shift from the synthetic wastewater to landfill leachate. In both cases with the increase of NLR from 0.5 to 1.1 – 1.2 kg N/m3d, the nitrogen removal rate (NRR) increases to about 1 kg N/m3d, but higher NLR caused substrates accumulation and affects anammox process efficiency. Maximum specific anammox activity was determined as 0.638 g N/g VSSd (NRR 1.023 kg N/m3d) and 0.594 g N/g VSSd (NRR 1.241 kg N/m3d) during synthetic and real wastewater treatment, respectively. Both values are similar and this is probably the nitrogen removal capacity of the used anammox biomass. This indicates, that landfill leachate did not influence the nitrogen removal capacity of the anammox process.

Mechanisms of Nitrogen Removal in Forage Rice Field Applied with Liquid Cattle Waste at High Nitrogen Loading

2012 ◽  
Vol 38 (5) ◽  
pp. 290-298 ◽  
Author(s):  
Shohei Riya ◽  
Sheng Zhou ◽  
Masaki Sagehashi ◽  
Akihiko Terada ◽  
Masaaki Hosomi
Keyword(s):  
Nitrogen Removal ◽  
Rice Field ◽  
Nitrogen Loading ◽  
High Nitrogen ◽  
Forage Rice ◽  
High Nitrogen Loading

scholarly journals A sample study on nitrogen removal from polluted streams by using hybrid natural wastewater treatment systems

2018 ◽  
Vol 20 (3) ◽  
pp. 572-581 ◽  
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Overland Flow ◽  
Low Cost ◽  
Free Water ◽  
Filter Material ◽  
Nitrogen Loading ◽  
Water Reservoirs ◽  
Hydraulic Residence Time ◽  
High Nitrogen Loading

<p>The ecological structure and function of the water reservoirs deteriorate dramatically because of streams fed by the excess nitrogen-containing wastewater. To protect the water reservoirs from polluted streams, structures such as natural wastewater treatment (NWT) systems to be created inside or outside streams may be a most suitable and economical solution method to overcoming the problem. In this study, a hybrid NWT system was installed to remove nitrogenous pollutants in Karasu creek (Nigde city, Turkey) in 2014. The system built near the creek consisted of feeding basin (FB), settlement basin (SB), free water surface-constructed wetland (FWS-CW), and overland flow (OF) system respectively. Despite quite high nitrogen loading rates, the system managed to reduce NH4+-N from average 29 mg/L to 12 mg/L and TN from 44 mg/L to 19 mg/L with an average removal efficiency of 57 %. Results revealed that hydraulic and nitrogen loading rate, temperature and seasonal variation, BOD/TKN ratio, hydraulic residence time (HRT), and the use of the filter material were effective on nitrogen removal. The results suggest that the hybrid NWT systems can be used as a low-cost wastewater treatment alternative to improve water quality in streams contaminated by nitrogenous pollutants in the similar areas.</p>

Does high nitrogen loading prevent clear-water conditions in shallow lakes at moderately high phosphorus concentrations?

2005 ◽  
Vol 50 (1) ◽  
pp. 27-41 ◽  
Author(s):  
Maria A. Gonzalez Sagrario ◽  
Erik Jeppesen ◽  
Joan Goma ◽  
Martin Sondergaard ◽  
Jens Peder Jensen ◽  
...  
Keyword(s):  
Shallow Lakes ◽  
Nitrogen Loading ◽  
Clear Water ◽  
High Nitrogen ◽  
High Phosphorus ◽  
Water Conditions ◽  
High Nitrogen Loading

Sustainable nitrogen removal by denitrifying anammox applied for anaerobic pre-treated potato wastewater

2012 ◽  
Vol 66 (12) ◽  
pp. 2630-2637 ◽  
Author(s):  
A. Mulder ◽  
A. I. Versprille ◽  
D. van Braak
Keyword(s):  
Nitrogen Removal ◽  
Oxygen Demand ◽  
Nitrogen Loading ◽  
Biofilm Reactor ◽  
Ammonium Oxidation ◽  
Loading Rates ◽  
Removal Capacity ◽  
Nitrite Production ◽  
Conversion Rates ◽  
In Series

The feasibility of sustainable nitrogen removal was investigated in a two stage biofilm configuration consisting of a MBBR (Moving Bed Biofilm Reactor) and a Deamox reactor (Biobed-EGSB). The MBBR is used for nitrification and the denitrifying ammonium oxidation (Deamox) is aimed at a nitrogen removal process in which part of the required nitrite for the typical anammox reaction originated from nitrate. Anaerobic pre-treated potato wastewater was supplied to a MBBR and Deamox reactor operated in series with a bypass flow of 30%. The MBBR showed stable nitrite production at ammonium-loading rates of 0.9–1.0 kg NH4-N/m3 d with ammonium conversion rates of 0.80–0.85 kg NH4-N/m3 d. The nitrogen-loading rate and conversion rate of the Deamox reactor were 1.6–1.8 and 1.6 kg N/m3 d. The maximum ammonium removal capacity in the Deamox reactor was 0.6 kg NH4-N/m3 d. The removal efficiency of soluble total nitrogen reached 90%. The Deamox process performance was found to be negatively affected during decline of the operating temperature from 33 to 22 °C and by organic loading rates with a chemical oxygen demand (COD)/NO2-N ratio &gt;1.

Anammox process for nitrogen removal from anaerobically digested fish canning effluents

2006 ◽  
Vol 53 (12) ◽  
pp. 265-274 ◽  
Author(s):  
A. Dapena-Mora ◽  
J.L. Campos ◽  
A. Mosquera-Corral ◽  
R. Méndez
Keyword(s):  
Nitrogen Removal ◽  
Bacterial Population ◽  
Loading Rate ◽  
Population Distribution ◽  
Nitrogen Loading ◽  
Fish Analysis ◽  
Organic Carbon Content ◽  
High Nitrogen ◽  
N Concentration ◽  
Anammox Process

The Anammox process was used to treat the effluent generated in an anaerobic digester which treated the wastewater from a fish cannery once previously processed in a Sharon reactor. The effluents generated from the anaerobic digestion are characterised by their high ammonium content (700–1,000 g NH+4-N m−3), organic carbon content (1,000–1,300 g TOC m−3) and salinity up to 8,000–10,000 g NaCl m−3. In the Sharon reactor, approximately 50% of the NH+4-N was oxidised to NO−2-N via partial nitrification. The effluent of the Sharon step was fed to the Anammox reactor which treated an averaged nitrogen loading rate of 500 g N m−3· d−1. The system reached an averaged nitrogen removal efficiency of 68%, mainly limited due to the nonstoichiometric relation, for the Anammox process, between the ammonium and nitrite added in the feeding. The Anammox reactor bacterial population distribution, followed by FISH analysis and batch activity assays, did not change significantly despite the continuous entrance to the system of aerobic ammonium oxidisers coming from the Sharon reactor. Most of the bacteria corresponded to the Anammox population and the rest with slight variable shares to the ammonia oxidisers. The Anammox reactor showed an unexpected robustness despite the continuous variations in the influent composition regarding ammonium and nitrite concentrations. Only in the period when NO−2-N concentration was higher than the NH+4-N concentration did the process destabilise and it took 14 days until the nitrogen removal percentage decreased to 34% with concentrations in the effluent of 340 g NH+4-N m−3 and 440 g NO−2-N m−3, respectively. Based on these results, it seems that the Sharon–Anammox system can be applied for the treatment of industrial wastewaters with high nitrogen load and salt concentration with an appropriate control of the NO−2-N/NH+4-N ratio.

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