scholarly journals Effects of different external carbon sources and electron acceptors on interactions between denitrification and phosphorus removal in biological nutrient removal processes

2018 ◽  
Vol 19 (4) ◽  
pp. 305-316 ◽  
Author(s):  
Xiang Hu ◽  
Dominika Sobotka ◽  
Krzysztof Czerwionka ◽  
Qi Zhou ◽  
Li Xie ◽  
...  
Keyword(s):  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Carbon Sources ◽  
Electron Acceptors ◽  
Biological Nutrient Removal ◽  
Removal Processes

Comparison of phosphorus removal characteristics between various biological nutrient removal processes

1997 ◽  
Vol 36 (12) ◽  
pp. 61-68 ◽  
Author(s):  
Eun Lee Sang ◽  
Soo Kim Kwang ◽  
Hwan Ahn Jae ◽  
Whoe Kim Chang
Keyword(s):  
Adverse Effect ◽  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Phosphorus Release ◽  
Biological Nutrient Removal ◽  
Phosphorus Concentration ◽  
Bench Scale ◽  
Removal Processes

Bench scale experiments were carried out with four biological nutrient removal(BNR) units, A/O, A2/O, Phostrip and P/L units, to investigate the behavior of phosphorus in the system and to compare the characteristics of phosphorus removal in four experimental BNR units. The influent COD/T-P ratio was varied from 22 to 64 by changing COD concentration while maintaining phosphorus concentration constant. In general sidestream BNR units such as Phostrip and P/L units outperformed mainstream BNR units such as A/O and A2/O units in terms of phosphorus removal. While phosphorus release and uptake in A/O and A2/O units became less significant at low influent COD/T-P, the phosphorus release in A2/O unit was further influenced by nitrate in return sludge and thus A2/O unit required even higher influent COD/T-P ratio for luxury uptake of phosphorus. The luxury uptake of phosphorus in Phostrip and P/L units were not affected by influent COD/T-P ratio and the adverse effect of nitrate in return sludge on anaerobic phosphorus release in P/L process was not significant due to the sludge blanket in P-stripper.

Re-use of winery wastewaters for biological nutrient removal

2007 ◽  
Vol 56 (2) ◽  
pp. 95-102 ◽  
Author(s):  
L. Rodríguez ◽  
J. Villaseñor ◽  
I.M. Buendía ◽  
F.J. Fernández
Keyword(s):  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Pilot Scale ◽  
Cod Removal ◽  
Biological Nutrient Removal ◽  
Organic Substrates ◽  
Winery Wastewater ◽  
A Value ◽  
Removal Processes

The aim of this study was to evaluate the feasibility of the re-use of the winery wastewater to enhance the biological nutrient removal (BNR) process. In batch experiments it was observed that the addition of winery wastewater mainly enhanced the nitrogen removal process because of the high denitrification potential (DNP), of about 130 mg N/g COD, of the contained substrates. This value is very similar to that obtained by using pure organic substrates such as acetate. The addition of winery wastewater did not significantly affect either phosphorus or COD removal processes. Based on the experimental results obtained, the optimum dosage to remove each mg of N–NO3 was determined, being a value of 6.7 mg COD/mg N–NO3. Because of the good properties of the winery wastewater to enhance the nitrogen removal, the viability of its continuous addition in an activated sludge pilot-scale plant for BNR was studied. Dosing the winery wastewater to the pilot plant a significant increase in the nitrogen removal was detected, from 58 to 75%. The COD removal was slightly increased, from 89 to 95%, and the phosphorus removal remained constant.

Efficient Biological Nutrient Removal in a Membrane Bioreactor Using Denitrifying Phosphorus Removal and Simultaneous Nitrification and Denitrification

2014 ◽  
Vol 507 ◽  
pp. 693-701
Author(s):  
Jiu Yi Li ◽  
Nian Peng Wu ◽  
Jin Li ◽  
Ai Min Wang ◽  
Yong Chen ◽  
...  
Keyword(s):  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Membrane Bioreactor ◽  
Phosphorus Release ◽  
Biological Nutrient Removal ◽  
Return Flow ◽  
Denitrifying Phosphorus Removal ◽  
Bioreactor System ◽  
Removal Processes ◽  
The Impact

Biological nutrient removal (BNR) is generally integrated in municipal wastewater treatment plants to alleviate the impact of treated effluent on receiving watersheds. This paper studies the performance of BNR in a membrane bioreactor system consisting of anaerobic, anoxic, micro-aerobic and aerobic compartments treating a synthetic wastewater containing low organic matters. The membrane bioreactor system designed an anti-stream, stepwise return flow scheme to produce ideal conditions for the occurrence of simultaneous nitrification and denitification and denitrifying phosphorus removal processes. The proposed membrane reactor system has established higher biomass concentrations and ideal environments for biological nutrient removal processes, which results in high nutrient removal efficiencies treating low organic wastewaters. Four compartment configurations in the reactor system minimized the impact of oxidized nitrogen species in return flow on phosphorus release in the anaerobic tank and the anti-stream, stepwise return flow scheme encouraged the utilization of nitrate as the electronic acceptor in phosphorus uptake in the micro-aerobic tank. Denitrifying phosphorus removal and simultaneous nitrification and denitrification processes are the main mechanisms responsible for efficient nutrient removal. High phosphorus release activities and high phosphate concentration in the anaerobic tank make it is potentially feasible to recover phosphorus resource from wastewater.

Assessment of the denitrification potential for biological nutrient removal processes using OUR/NUR measurements

2002 ◽  
Vol 46 (9) ◽  
pp. 237-246 ◽  
Author(s):  
S. Sözen ◽  
N. Artan ◽  
D. Orhon ◽  
E. Avcioglu
Keyword(s):  
Mass Balance ◽  
Nutrient Removal ◽  
Carbon Sources ◽  
Biological Nutrient Removal ◽  
Meat Processing ◽  
Denitrification Potential ◽  
Removal Processes ◽  
University Of Cape Town ◽  
Activated Sludge Systems ◽  
Key Parameter

The denitrification potential, a key parameter in nutrient removal activated sludge systems, is mathematically described in terms of mass balance expressions for different carbon sources, namely, easily biodegradable substrate, slowly biodegradable substrate and biomass. Mass balance was derived both for single-anoxic (pre-denitrification) and dual anoxic (Bardenpho) systems. Correction factors for anoxic growth were experimentally determined using respirometry for domestic sewage and meat processing wastewater. The denitrification potential expressions were evaluated for different process configurations such as pre-denitrification, Bardenpho process and University of Cape Town (UCT) process.

scholarly journals Modelization of Nutrient Removal Processes at a Large WWTP Using a Modified ASM2d Model

2018 ◽  
Vol 15 (12) ◽  
pp. 2817 ◽  
Author(s):  
Jakub Drewnowski ◽  
Jacek Makinia ◽  
Lukasz Kopec ◽  
Francisco-Jesus Fernandez-Morales
Keyword(s):  
Nutrient Removal ◽  
Carbon Sources ◽  
Oxygen Demand ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Organic Substrates ◽  
Modified Model ◽  
Rate Limiting Step ◽  
Uptake Rates ◽  
Rate Limiting

The biodegradation of particulate substrates starts by a hydrolytic stage. Hydrolysis is a slow reaction and usually becomes the rate limiting step of the organic substrates biodegradation. The objective of this work was to evaluate a novel hydrolysis concept based on a modification of the activated sludge model (ASM2d) and to compare it with the original ASM2d model. The hydrolysis concept was developed in order to accurately predict the use of internal carbon sources in enhanced biological nutrient removal (BNR) processes at a full scale facility located in northern Poland. Both hydrolysis concepts were compared based on the accuracy of their predictions for the main processes taking place at a full-scale facility. From the comparison, it was observed that the modified ASM2d model presented similar predictions to those of the original ASM2d model on the behavior of chemical oxygen demand (COD), NH4-N, NO3-N, and PO4-P. However, the modified model proposed in this work yield better predictions of the oxygen uptake rate (OUR) (up to 5.6 and 5.7%) as well as in the phosphate release and uptake rates.

scholarly journals Construction, Operation And Evaluation Of A Compact Upright Bioreactor For The Elimination Of Nutrients (CUBEN)

2021 ◽  
Author(s):  
Maryam Reza
Keyword(s):  
Phosphorus Removal ◽  
Nitrate Removal ◽  
Biological Nutrient Removal ◽  
Economic Losses ◽  
Removal Process ◽  
Quality Issue ◽  
Property Price ◽  
Removal Processes ◽  
Construction Operation ◽  
Water Quality Issue

Eutrophication is reported as the most important water quality issue around the world. The potential death of Lake Winnipeg, the world's ninth largest lake, is a dramatic exampe of this ecological disater in Canda. Property price devaluation, tourist repulsion, and toxicity due to eutrophication cause the annual economic losses over $3 billion in Europe, South and North America. The objective of this thesis is to develop an efficient biological nutrient removal reactor to be commercialized and used in the water/wastewater treatment industry. This bioreactor has a unique configuration which is filed as a US patent technology called "Compact Upright Bioreactor for the Elimination of Nutrients", invented by M. Alvarez Cuenca and M. Reza. It consists of four stages including Deaeration, Anoxic, Anaerobic and Aerobic where Do removal, denitrification and phosphorus removal processes take place respectively. The bioreactor performs very well obtaining 100% Do removal and 98% nitrate removal efficiency. The phosphorus removal process requires much longer operational period to reach steady state. The phosphorus removal process shows variable results having a maximum of 60% removal success.

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